Capacitor fixing structure for frequency converter

Abstract

The utility model discloses a capacitor fixing structure for a frequency converter. The capacitor fixing structure for the frequency converter comprises a casing, the casing comprises a vertical mounting frame, the front side of the vertical mounting frame is provided with a mounting structure, and the rear side of the vertical mounting frame is provided with at least one first limiting piece; the at least one tray is arranged on the vertical mounting frame; the at least one second limiting piece is arranged on the rear side of the capacitor and is in plug-in fit with the first limiting piece so as to limit the rear side of the capacitor; and the at least one front fastener is arranged at the front side of the capacitor, and the front fastener is fixedly connected with the mounting structure and limits the front side of the capacitor. The assembling and disassembling difficulty of the capacitor can be reduced, and the replacement or maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converters, and in particular to a capacitor fixing structure for a frequency converter. Background Art

[0002] A variable frequency drive (VFD) is a device used to control the speed and output power of an alternating current motor. It can achieve precise speed regulation by controlling the input voltage and frequency of the motor, thereby effectively saving energy and prolonging the service life of the motor.

[0003] The frequency converter uses electronic technology to control the frequency and voltage of alternating current by controlling the on and off of electronic components in the frequency converter. In the frequency converter, capacitors are used to filter the input voltage and rectify the output voltage. The capacitors are usually fixed on the bottom plate of the frequency converter by fasteners.

[0004] In the prior art, capacitors are usually installed vertically on the horizontal mounting surface of the frequency converter and fixed on the bottom plate of the frequency converter by fasteners. The vertical installation of capacitors has the following advantages:

[0005] 1. The heat dissipation area is increased, thereby improving the heat dissipation effect.

[0006] 2. The volume is reduced, thereby reducing the volume of the frequency converter.

[0007] 3. The installation is convenient, reducing the installation time.

[0008] However, in the prior art, when capacitors are installed vertically, they are fixed on both sides by fasteners, and only 3 capacitors can be installed in each cabinet. This makes the assembly and disassembly inconvenient, especially for maintenance. When it is necessary to replace or maintain the components in the client capacitor, it is very difficult to disassemble the capacitor from the complete frequency converter, and it requires more effort from the service personnel. Summary of the Utility Model

[0009] In view of this, the utility model provides a capacitor fixing structure for a frequency converter, which can reduce the difficulty of installing and disassembling the capacitor and improve the replacement or maintenance efficiency.

[0010] According to an embodiment of the utility model, there is provided a capacitor fixing structure for a frequency converter, including:

[0011] A casing, the casing includes a vertical mounting frame, an installation structure is arranged on the front side of the vertical mounting frame, and at least one first limiting member is arranged on the rear side;

[0012] At least one tray, arranged on the vertical mounting frame;

[0013] At least one second limiting member, which is arranged at the rear side of the capacitor and forms a plug-in fit with the first limiting member to limit the rear side of the capacitor;

[0014] At least one front fastener, which is arranged at the front side of the capacitor, is fixedly connected to the mounting structure, and limits the front side of the capacitor.

[0015] In a preferred embodiment, the number of trays is multiple, and the multiple trays are arranged at intervals in the vertical direction on the vertical mounting frame, and each tray forms a capacitor mounting position.

[0016] In a preferred embodiment, at least one slider extending along the installation direction of the capacitor is arranged on the bearing surface of the tray, and the slider guides the installation of the capacitor in a sliding manner.

[0017] In a preferred embodiment, the first limiting member includes a Z-shaped plate, the Z-shaped plate includes two side plates and a middle plate, the first side plate is fixedly installed on the vertical mounting frame, the middle plate extends away from the vertical mounting frame, and a receiving space for the second limiting member is formed between the middle plate and the vertical mounting frame, the second side plate is located on the installation path of the capacitor and forms a stop for the installation position of the capacitor, and the second limiting member is in plug-in fit with the second side plate.

[0018] In a preferred embodiment, a slot is formed on the second side plate, the second limiting member includes a U-shaped plate and an L-shaped plate, one U-shaped side wall of the U-shaped plate is fixedly connected to the rear side wall of the capacitor, and an installation groove is formed between the U-shaped plate and the rear side wall, the first side plate of the L-shaped plate is inserted into the installation groove, and the second side plate of the L-shaped plate extends towards the second side plate and is inserted into the slot.

[0019] In a preferred embodiment, the second side plate is attached to the bottom wall of the U-shaped plate and is fixedly connected by bolts.

[0020] In a preferred embodiment, a strip-shaped groove is formed on the first side plate, a fixing hole is formed on the vertical mounting frame, and the bolt passes through the strip-shaped groove and is fixedly connected in the fixing hole.

[0021] In a preferred embodiment, the front fastener is arranged at the front side of the middle side wall of the capacitor and protrudes laterally from the middle side wall of the capacitor.

[0022] In a preferred embodiment, the front fastener includes a U-shaped plate and an L-shaped plate, one U-shaped side wall of the U-shaped plate is fixedly connected to the middle side wall of the capacitor, and an installation groove is formed between the U-shaped plate and the middle side wall, the first side plate of the L-shaped plate is inserted into the installation groove, and the second side plate of the L-shaped plate is attached to the bottom wall of the U-shaped plate and is fixedly connected to the bottom wall of the U-shaped plate.

[0023] In a preferred embodiment, the lateral protrusion height of the second side plate of the L-shaped plate relative to the middle side wall is less than or equal to the lateral protrusion height of the U-shaped plate relative to the middle side wall.

[0024] As can be seen from the above solution, for the capacitor fixing structure for an inverter according to the present invention, the capacitor can be installed in a front-back manner. The capacitor is inserted from the front side of the vertical installation frame, then placed on the tray, and pushed into the capacitor installation position from the tray, so that the second limiting member at the rear side of the capacitor is inserted and matched with the first limiting member along the installation direction of the capacitor. The cooperation between the second limiting member and the first limiting member forms a limit stop for the rear side of the capacitor. When the capacitor is installed in place, the front fastener reaches the matching position with the installation structure on the front side of the vertical installation frame and is fixedly connected, thereby forming a limit stop for the front side of the capacitor, so that the capacitor is stably held on the tray, completing the fixed installation of the capacitor. When the capacitor needs to be disassembled, only the disassembly between the front fastener and the installation structure needs to be completed, and the entire capacitor can be pulled out from the front side of the vertical installation frame. The entire installation, fixing, and disassembly process of the capacitor only requires operating on the front fastener on the front side of the capacitor. Therefore, the operation is simpler, more convenient and time-saving, and can effectively improve the replacement and maintenance efficiency of the capacitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The following will make those of ordinary skill in the art more clearly understand the above and other features and advantages of the present invention by referring to the preferred embodiments of the present invention described in detail with reference to the drawings. In the drawings:

[0026] Figure 1 is the first axonometric view of the capacitor fixing structure for an inverter according to the present invention;

[0027] Figure 2 is Figure 1 the enlarged structural schematic diagram of the L position of

[0028] Figure 3 is the second axonometric view of the capacitor fixing structure for an inverter according to the present invention;

[0029] Figure 4 is Figure 3 the enlarged structural schematic diagram of the M position of

[0030] Figure 5 is the third axonometric view of the capacitor fixing structure for an inverter according to the present invention.

[0031] In the above drawings, the following reference numerals are used:

[0032] 1. Housing; 2. Vertical mounting frame; 3. Mounting structure; 4. First limiting member; 5. Tray; 6. Second limiting member; 7. Front fastener; 8. Side plate; 9. Intermediate plate; 10. Slide block; 11. U-shaped plate; 12. L-shaped plate; 13. Mounting groove; 14. Bolt; 15. Fixing hole; 16. Slot; 17. Strip-shaped groove; 18. Intermediate side wall; 19. Capacitor. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the present utility model clearer, the following examples are given to further elaborate on the present utility model in detail.

[0034] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0035] It should be pointed out that unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0036] In the present utility model, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" usually refer to the directions shown in the drawings, or refer to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contours of the respective components themselves, but the above orientation terms do not limit the present utility model.

[0037] As Figures 1 to 5 shown, according to an embodiment of the present utility model, a capacitor fixing structure for an inverter includes: a housing 1, the housing 1 includes a vertical mounting frame 2, a mounting structure 3 is provided on the front side of the vertical mounting frame 2, and at least one first limiting member 4 is provided on the rear side; at least one tray 5 is provided on the vertical mounting frame 2; at least one second limiting member 6 is provided on the rear side of the capacitor 19 and forms a plug-in fit with the first limiting member 4 to limit the rear side of the capacitor 19; at least one front fastener 7 is provided on the front side of the capacitor 19, and the front fastener 7 is fixedly connected to the mounting structure 3 and limits the front side of the capacitor 19.

[0038] In this embodiment, after adopting the capacitor fixing structure for the frequency converter, the capacitor 19 can be installed in a front-to-back manner. The capacitor 19 is inserted from the front side of the vertical installation frame 2, then placed on the tray 5, and pushed into the capacitor installation position from the tray 5, so that the second limiting member 6 at the rear side of the capacitor 19 is inserted and matched with the first limiting member 4 along the installation direction of the capacitor 19, and the cooperation between the second limiting member 6 and the first limiting member 4 is used to form a limiting stop for the rear side of the capacitor 19. When the capacitor 19 is installed in place, the front fastener 7 and the installation structure 3 on the front side of the vertical installation frame 2 reach the mating position and are fixedly connected, thereby forming a limiting stop for the front side of the capacitor 19, so that the capacitor 19 is stably held on the tray 5, and the fixed installation of the capacitor 19 is completed. When the capacitor 19 needs to be disassembled, only the disassembly between the front fastener 7 and the installation structure 3 needs to be completed, and the entire capacitor 19 can be pulled out from the front side of the vertical installation frame 2. The entire installation, fixing, and disassembly process of the capacitor 19 only needs to operate on the front fastener 7 on the front side of the capacitor 19. Therefore, the operation is simpler, more convenient and time-saving, and can effectively improve the replacement and maintenance efficiency of the capacitor 19.

[0039] In one embodiment, the number of trays 5 is multiple, and the multiple trays 5 are arranged at intervals in the vertical direction on the vertical installation frame 2, and each tray 5 forms a capacitor installation position.

[0040] In this embodiment, the tray 5 is pre-fixed and installed at a preset position on the vertical installation frame 2, so that the space between adjacent trays 5 is sufficient to meet the installation space required for the capacitor 19. Since the capacitor 19 is installed by being pushed into the capacitor installation position of the tray 5 from the front side of the vertical installation frame 2 along the front-to-back direction during installation, the setting of other trays 5 will not hinder the installation of the capacitor 19. The capacitor 19 can be quickly inserted into the space between adjacent trays 5. The second limiting member 6 at the rear side of the capacitor 19 is inserted and matched with the first limiting member 4 along the installation direction of the capacitor 19, which also avoids the fixation of the rear side structure of the capacitor 19 occupying the space in the vertical direction, so that the fixation of the rear side structure of the capacitor 19 can be realized through the horizontal installation, and the vertical space required during installation is smaller. This front-to-back installation method of the capacitor 19 makes the structural design of the tray 5 more convenient, and the structure of the formed capacitor installation position is more compact. With the same installation space of the vertical installation frame 2, when the capacitor 19 is installed by the above structural method, the installation quantity of the capacitor 19 can be increased significantly. For example, originally 3 capacitors 19 could be installed, and after adopting the above structure, 9 capacitors 19 can be installed, making the installation space on the vertical installation frame 2 more fully utilized.

[0041] In one embodiment, at least one slider 10 extending along the installation direction of the capacitor 19 is provided on the bearing surface of the tray 5, and the slider 10 guides the installation of the capacitor 19 in a sliding manner. In this embodiment, by providing the slider 10 on the tray 5, the slider 10 can be used to carry and guide the capacitor 19, avoiding direct contact between the capacitor 19 and the tray 5, thereby reducing the sliding contact area of the capacitor 19, reducing the sliding resistance of the capacitor 19 during installation, reducing the sliding friction of the capacitor 19, avoiding sliding wear between the capacitor 19 and the tray 5 during installation, and improving the service life of the tray 5 and the capacitor 19.

[0042] In one embodiment, the slider 10 is in the structure of a long strip plate and extends from the front side to the rear side of the tray 5 along the installation direction of the capacitor 19.

[0043] In one embodiment, the number of the sliders 10 is multiple, and the multiple sliders 10 are arranged at intervals on the tray 5. The arrangement direction of the sliders 10 is perpendicular to the installation direction of the capacitor 19, so as to support the capacitor 19 from multiple positions and improve the stability of the capacitor 19 during installation.

[0044] In one embodiment, the slider 10 is made of plastic and has a self-lubricating function, which can further reduce the frictional resistance during the installation of the capacitor 19 and reduce the wear during the installation and disassembly of the capacitor 19.

[0045] In one embodiment, the tray 5 can be fixedly connected to the vertical installation frame 2 by means of welding, bolt connection, etc.

[0046] In one embodiment, angle irons are provided at the bottom of the tray 5. The tray 5 is fixedly connected to the angle irons, and the angle irons are fixedly connected to the vertical installation frame 2 by bolts.

[0047] In one embodiment, the first limiting member 4 includes a Z-shaped plate. The Z-shaped plate includes two side plates 8 and an intermediate plate 9. The first side plate 8 is fixedly installed on the vertical installation frame 2. The intermediate plate 9 extends away from the vertical installation frame 2 and forms an accommodation space for the second limiting member 6 with the vertical installation frame 2. The second side plate 8 is located on the installation path of the capacitor 19 and forms a stop for the installation position of the capacitor 19. The second limiting member 6 is in plug-in fit with the second side plate 8.

[0048] In this embodiment, the first limiting member 4 adopts a Z-shaped plate structure. Both side plates 8 of the Z-shaped plate structure are perpendicular to the middle plate 9. The two side plates 8 are parallel to each other, and the two side plates 8 are respectively located on two opposite sides of the middle plate 9, and the extending directions of the two side plates 8 relative to the middle plate 9 are opposite. That is, the first side plate 8 located on the first side of the middle plate 9 extends towards the outer side where the vertical mounting frame 2 is located, and the second side plate 8 located on the second side of the middle plate 9 extends towards the side where the capacitor 19 is located. This structural arrangement enables the first side plate 8 to be located at the position of the vertical mounting frame 2 and facilitates fixed connection with the vertical mounting frame 2. The second side plate 8 can be located at the mounting position of the capacitor 19, facilitating positioning cooperation with the capacitor 19. At the same time, the middle plate 9 extends along the mounting direction of the capacitor 19, which can also reserve space for the setting of the second limiting member 6. By adjusting the length of the middle plate 9, the structural design of the first limiting member 4 can better meet the installation position requirements of the capacitor 19 and improve the installation accuracy of the capacitor 19. This structure of the first limiting member 4 can be formed by bending, with simple and convenient molding, low implementation cost, and can simultaneously achieve installation cooperation with the vertical mounting frame 2 and the capacitor 19, and the structural design is reasonable.

[0049] In one embodiment, the first limiting member 4 can also adopt an L-shaped plate structure, or other structures that are convenient for installing and positioning the capacitor 19.

[0050] In one embodiment, a slot 16 is formed on the second side plate 8. The second limiting member 6 includes a U-shaped plate 11 and an L-shaped plate 12. One U-shaped side wall of the U-shaped plate 11 is fixedly connected to the rear side wall of the capacitor 19, and an installation groove 13 is formed between the U-shaped plate 11 and the rear side wall. The first side plate of the L-shaped plate 12 is inserted into the installation groove 13, and the second side plate of the L-shaped plate 12 extends towards the second side plate 8 and is inserted into the slot 16.

[0051] In this embodiment, the slot 16 on the second side plate 8 is correspondingly arranged with the second side plate of the L-shaped plate 12 on the second limiting member 6, and the shape of the slot matches the cross-sectional shape of the second side plate of the L-shaped plate 12. Thus, after the second side plate of the L-shaped plate 12 and the slot 16 are inserted and matched, effective limiting can be achieved in all directions of up, down, left, and right. The range of up, down, left, and right here is determined with reference to the front side of the capacitor 19.

[0052] Since the second side plate of the L-shaped plate 12 needs to be inserted into the slot 16, the second side plate of the L-shaped plate 12 needs to extend out of the bottom wall of the U-shaped plate 11 to prevent the bottom wall of the U-shaped plate 11 from interfering with the insertion between the second side plate of the L-shaped plate 12 and the slot 16.

[0053] The second limiting member 6 is composed of a U-shaped plate 11 and an L-shaped plate 12. The U-shaped plate 11 can be used to install and fix the second limiting member 6 on the capacitor 19, improving the bonding strength and structural stability between the second limiting member 6 and the rear side wall of the capacitor 19. Moreover, the structural characteristics of the L-shaped plate 12 can be utilized to form a structure for inserting into the slot 16, and the L-shaped plate 12 can also be installed and fixed by using the U-shaped plate 11.

[0054] In one embodiment, the U-shaped plate 11 and the capacitor 19 can be fixed by welding.

[0055] In one embodiment, in order to further reduce the matching difficulty between the second side plate of the L-shaped plate 12 and the slot 16, two guiding bevels are provided on the side of the second side plate of the L-shaped plate 12 facing the slot 16. The two guiding bevels are respectively located on the upper and lower sides of the second side plate of the L-shaped plate 12, which can reduce the width of the second side plate of the L-shaped plate 12 in the up and down directions when entering the slot 16, and can guide the installation of the second side plate of the L-shaped plate 12 by utilizing the characteristic that the width of the guiding bevel gradually increases along with the increase of the installation depth.

[0056] In one embodiment, the guiding bevel is a straight edge or an arc edge.

[0057] When the second side plate of the L-shaped plate 12 is inserted into the slot 16 in place, the two guiding bevels completely pass out of the slot 16, so as not to have an adverse effect on the positioning of the second side plate of the L-shaped plate 12 in the slot 16.

[0058] In one embodiment, the second side plate is attached to the bottom wall of the U-shaped plate 11 and is fixedly connected by bolts 14.

[0059] In this embodiment, the second side plate of the L-shaped plate 12 is attached to the bottom wall of the U-shaped plate 11 and is fixedly connected to the bottom wall of the U-shaped plate 11 by bolts 14 to realize the installation and fixation of the L-shaped plate 12. The first side plate of the L-shaped plate 12 passes through the installation groove 13, which can limit the relative position between the L-shaped plate 12 and the U-shaped plate 11. In addition, after the first side plate of the L-shaped plate 12 is attached to the rear side wall of the capacitor 19, it can be fixed by welding or bolt connection, etc., further improving the stability of the connection structure between the second limiting member 6 and the capacitor 19.

[0060] Of course, in some embodiments, the first side plate of the L-shaped plate 12 can also be suspended after passing through the installation groove 13 to position the relative position between the second side plate of the L-shaped plate 12 and the U-shaped plate 11, improving the positioning and assembly efficiency between the second side plate of the L-shaped plate 12 and the U-shaped plate 11.

[0061] In one embodiment, a strip-shaped groove 17 is formed in the first side plate 8, and a fixing hole 15 is formed in the vertical mounting frame 2. A bolt 14 passes through the strip-shaped groove 17 and is fixedly connected in the fixing hole 15.

[0062] In this embodiment, by forming the strip-shaped groove 17 in the first side plate 8, it is possible to conveniently adjust the connection position between the first limiting member 4 and the vertical mounting frame 2, thereby eliminating the adverse effects caused by processing errors and the like on the connection between the first limiting member 4 and the vertical mounting frame 2, and making the installation accuracy of the first limiting member 4 higher.

[0063] In one embodiment, a plurality of fixing holes 15 are formed in the vertical mounting frame 2, and the first limiting member 4 can adjust the matching position with the fixing holes 15 as needed, making it more flexible and convenient to use.

[0064] In one embodiment, the front fastener 7 is arranged on the front side of the middle side wall 18 of the capacitor 19 and laterally extends from the middle side wall 18 of the capacitor 19.

[0065] In this embodiment, the middle side wall 18 refers to the side wall located between the front side wall and the rear side wall of the capacitor 19.

[0066] The front fastener 7 is arranged on the middle side wall 18 of the capacitor 19, and the setting position on the middle side wall 18 can be adjusted as needed, so that the setting position of the front fastener 7 on the middle side wall 18 of the capacitor 19 can be adjusted according to the different specifications of the vertical mounting frame 2 and the capacitor 19, making the setting position of the front fastener 7 always adaptable to the installation position of the capacitor 19 on the vertical mounting frame 2, and having better applicability.

[0067] In one embodiment, the front fastener 7 includes a U-shaped plate 11 and an L-shaped plate 12. One U-shaped side wall of the U-shaped plate 11 is fixedly connected to the middle side wall 18 of the capacitor 19, and an installation groove 13 is formed between the U-shaped plate 11 and the middle side wall 18. The first side plate of the L-shaped plate 12 is inserted into the installation groove 13, and the second side plate of the L-shaped plate 12 is attached to the bottom wall of the U-shaped plate 11 and fixedly connected to the bottom wall of the U-shaped plate 11.

[0068] In one embodiment, the lateral extension height of the second side plate of the L-shaped plate 12 relative to the middle side wall 18 is less than or equal to the lateral extension height of the U-shaped plate 11 relative to the middle side wall 18.

[0069] In this embodiment, since the second side plate of the L-shaped plate 12 is used to achieve the installation and fixation with the U-shaped plate 11 and does not need to have the plugging function, for the consideration of material cost and processing cost, the lateral extension height of the second side plate of the L-shaped plate 12 relative to the middle side wall 18 is less than or equal to the lateral extension height of the U-shaped plate 11 relative to the middle side wall 18.

[0070] In one embodiment, the capacitor fixing structure for an inverter further includes a capacitor 19, and the capacitor 19 is installed on a tray 5.

[0071] When installing and fixing the capacitor 19 using the capacitor fixing structure for an inverter in this embodiment, first install a second limiting member 6 on the rear side wall of the capacitor 19, then install a first limiting member 4 at the corresponding position of the vertical installation frame 2 of the housing 1, then fixedly install the tray 5 on the vertical installation frame 2, and finally insert the capacitor 19 into the capacitor installation position of the tray 5 from the front side of the vertical installation frame 2, and make the first limiting member 4 and the second limiting member 6 be inserted and fixed with each other, and then use a front fastener 7 to fix the front side of the capacitor 19 on the vertical installation frame 2 to complete the installation of the entire capacitor 19.

[0072] In the subsequent process, if replacement or repair is needed, only the front fastener 7 between the capacitor 19 and the vertical installation frame 2 needs to be disassembled, and the entire capacitor 19 can be pulled out from the tray 5 by one-sided operation. The operation is simple and convenient, and it will not affect other capacitors 19 and other components, so it is more convenient and time-saving.

[0073] As can be seen from the above solution, according to the capacitor fixing structure for an inverter proposed by the present invention, the capacitor can be installed in a front-back manner. The capacitor is inserted from the front side of the vertical installation frame, then placed on the tray, and pushed into the capacitor installation position from the tray, so that the second limiting member on the rear side of the capacitor is inserted and cooperated with the first limiting member along the installation direction of the capacitor, and the cooperation between the second limiting member and the first limiting member forms a limiting stop for the rear side of the capacitor. When the capacitor is installed in place, the front fastener and the installation structure on the front side of the vertical installation frame reach the cooperation position and are fixedly connected, so as to form a limiting stop for the front side of the capacitor, so that the capacitor is stably held on the tray to complete the fixed installation of the capacitor. When the capacitor needs to be disassembled, only the disassembly between the front fastener and the installation structure needs to be completed, and the entire capacitor can be pulled out from the front side of the vertical installation frame. The entire installation, fixing and disassembly process of the capacitor only needs to operate on the front fastener on the front side of the capacitor, so the operation is simpler, more convenient and time-saving, and can effectively improve the replacement and maintenance efficiency of the capacitor.

[0074] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A capacitor fixing structure for a frequency converter, characterized in that: include: A housing (1), the housing (1) comprising a vertical mounting frame (2), a mounting structure (3) being arranged on the front side of the vertical mounting frame (2), and at least one first position-limiting member (4) being arranged on the rear side; At least one tray (5) arranged on the vertical mounting frame (2); At least one second limiting member (6) is arranged on the rear side of the capacitor (19) and is plug-fitted with the first limiting member (4) to limit the rear side of the capacitor (19); At least one front fastener (7) is arranged on the front side of the capacitor (19); the front fastener (7) is fixedly connected to the mounting structure (3) and limits the front side of the capacitor (19).

2. The capacitor fixing structure according to claim 1, characterized in that: There are a plurality of trays (5), and the plurality of trays (5) are arranged on the vertical installation frame (2) at intervals along the vertical direction, and each tray (5) forms a capacitor installation position.

3. The capacitor fixing structure according to claim 1, characterized in that: At least one sliding block (10) extending along the installation direction of the capacitor (19) is provided on the bearing surface of the tray (5), and the sliding block (10) provides sliding guidance for the installation of the capacitor (19).

4. The capacitor fixing structure according to claim 1, characterized in that: The first limiting member (4) comprises a Z-shaped plate, and the Z-shaped plate comprises two side plates (8) and a middle plate (9). The first side plate (8) is fixedly mounted on the vertical mounting frame (2). The middle plate (9) extends in a direction away from the vertical mounting frame (2) and forms a receiving space for the second limiting member (6) between the middle plate (9) and the vertical mounting frame (2). The second side plate (8) is located on the mounting path of the capacitor (19) and forms a stop for the mounting position of the capacitor (19). The second limiting member (6) is plugged into and matched with the second side plate (8).

5. The capacitor fixing structure according to claim 4, characterized in that: A slot (16) is provided on the second side plate (8), the second limiting member (6) comprises a U-shaped plate (11) and an L-shaped plate (12), a U-shaped side wall of the U-shaped plate (11) is fixedly connected to the rear side wall of the capacitor (19), and a mounting groove (13) is formed between the U-shaped side wall and the rear side wall, a first side plate of the L-shaped plate (12) is inserted into the mounting groove (13), and a second side plate of the L-shaped plate (12) extends toward the second side plate (8) and is inserted into the slot (16).

6. The capacitor fixing structure according to claim 5, characterized in that: The second side plate is fitted with the bottom wall of the U-shaped plate (11) and is fixedly connected by bolts (14).

7. The capacitor fixing structure according to claim 4, characterized in that: A strip groove (17) is provided on the first side plate (8), and a fixing hole (15) is provided on the vertical installation frame (2). A bolt (14) passes through the strip groove (17) and is fixedly connected in the fixing hole (15).

8. The capacitor fixing structure according to claim 1, characterized in that: The front fastener (7) is arranged on the front side of the middle side wall (18) of the capacitor (19) and protrudes laterally from the middle side wall (18) of the capacitor (19).

9. The capacitor fixing structure according to claim 8, characterized in that: The front fastener (7) comprises a U-shaped plate (11) and an L-shaped plate (12); a U-shaped side wall of the U-shaped plate (11) is fixedly connected to the middle side wall (18) of the capacitor (19) and forms a mounting groove (13) between the U-shaped side wall and the middle side wall (18); a first side plate of the L-shaped plate (12) is inserted into the mounting groove (13); and a second side plate of the L-shaped plate (12) is attached to the bottom wall of the U-shaped plate (11) and fixedly connected to the bottom wall of the U-shaped plate (11).

10. The capacitor fixing structure according to claim 9, characterized in that: The lateral extension height of the second side plate of the L-shaped plate (12) relative to the middle side wall (18) is less than or equal to the lateral extension height of the U-shaped plate (11) relative to the middle side wall (18).

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