Energy storage cabinet

By designing a detachable energy storage cabinet, the problem of the non-replaceable external panels of the cabinet in the existing technology is solved, the replacement of the cabinet side panels and top covers is realized, and the use needs of customers is met, and the lightweight design is reduced cost.

CN222508893UActive Publication Date: 2025-02-18SHANGHAI PYLON TECH CO LTD
View PDF 0 Cites 1 Cited by

Patent Information

Application Number
CN202420548935.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-03-20
Publication Date
2025-02-18
Estimated Expiration
2034-03-20

AI Technical Summary

Technical Problem

In the prior art, conventional cabinets made of foam structures cannot be replaced with external panels, resulting in the inability to meet the needs of customers when there are bumps or scratches.

Method used

An energy storage cabinet is designed that includes a removable rack, side panels and top cover. The side plate can be independently installed on the side of the frame, and the top cover is removably buckled on the top of the frame and the side plate. The structure of the hook and the clamping projection is used to achieve clamping between the side plate and the frame.

Benefits of technology

The replacement of the cabinet side panels and top cover is achieved, meeting the customer's needs for the appearance and practicality of the cabinet. At the same time, the thickness of the panels is reduced through the combination of plates and sealant strips, which helps to lightweight design and reduces cost.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222508893U_ABST
    Figure CN222508893U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of cabinets, in particular to an energy storage cabinet which comprises a rack, side plates and a top cover. The number of the side plates is multiple, and the side plates are detachably installed on the side portions of the machine frame respectively. The top cover is detachably arranged on the top of the rack and the top of the side plate in a buckled mode. According to the energy storage cabinet provided by the invention, the front, back, left and right side plates and the top cover at the top can be replaced, so that when the side plates or the top cover of the cabinet is damaged or scratched, the side plates or the top cover can be replaced at any time, the attractiveness and the practicability are ensured, the use requirements of customers are met, and only the damaged structure needs to be replaced; the use of other structures is not influenced, and the material cost is saved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present application relates to the technical field of cabinets, and in particular to an energy storage cabinet. Background Art

[0002] In recent years, the appearance of cabinets has become increasingly demanded. If a cabinet delivered to the site has problems such as bumps and scratches, the entire cabinet may be replaced. However, the external panels of conventional cabinets are mostly welded to the internal frame, making the external panels non-replaceable and unable to meet customer needs. Utility Model Content

[0003] The purpose of the present application is to provide an energy storage cabinet, which to a certain extent solves the technical problem that the conventional cabinet in the prior art is an integrated cabinet made of a foam structure, and when bumps or scratches occur, the external panel cannot be replaced, thereby failing to meet the customer's usage needs.

[0004] The present application provides an energy storage cabinet, comprising: a frame, side panels and a top cover; wherein the number of the side panels is multiple, and they are respectively detachably installed on the respective sides of the frame; the top cover is detachably buckled on the top of the frame and the side panels.

[0005] In the above technical solution, further, the side panel is snap-connected with the frame.

[0006] In any of the above technical solutions, further, a hook is formed on the top of the side plate, a clamping protrusion is formed on the top of the frame, and the hook is clamped on the clamping protrusion.

[0007] In any of the above technical solutions, further, the frame includes a longitudinal beam, a top plate and a connecting piece; wherein the longitudinal beams are multiple in number and are sequentially arranged at intervals and surround a supporting body;

[0008] The top plate is arranged at the top of the plurality of longitudinal beams, and a clamping portion is formed on the top plate, a clamping groove is formed between any two adjacent longitudinal beams, and the clamping portion is clamped in the clamping groove; the connecting member is arranged at the top of the top plate, and the connecting member is formed with the clamping protrusion.

[0009] In any of the above technical solutions, further, the energy storage cabinet also includes a bottom plate, and the bottom plate is installed at the bottom of the rack.

[0010] In any of the above technical solutions, further, the bottom of the side plate is bent to form a limiting plate, and the limiting plate abuts against the lower surface of the bottom plate.

[0011] In any of the above technical solutions, further, the limiting plate and the bottom plate are detachably connected via a fastening component.

[0012] In any of the above technical solutions, further, the side edges of the frame are concave to form a drainage groove, and the drainage groove extends along the height direction of the frame;

[0013] The side opening of the drainage groove is closed by the side plate adjacent to the drainage groove to form a drainage channel, and the bottom plate is formed with a drainage hole connected to the drainage channel.

[0014] In any of the above technical solutions, further, the energy storage cabinet also includes a side sealing strip, which is arranged on the side wall of the drainage groove, and the two sides of the side sealing strip are respectively against the inner wall of the side panel adjacent to the drainage groove.

[0015] In any of the above technical solutions, further, the energy storage cabinet also includes a top sealing strip, each side of the top of the rack is provided with the top sealing strip, and the top sealing strip is against the inner wall of the side plate;

[0016] A drainage gap is formed between the adjacent ends of any two adjacent top sealing strips, and the drainage gap is communicated with the top of the drainage groove.

[0017] In any of the above technical solutions, further, the outer wall of any two adjacent side panels is concave to form a mounting groove, and the other one of the two adjacent side panels is bent to form a closed portion, and the closed portion is arranged in the mounting groove and abuts against the inner wall of the mounting groove.

[0018] In any of the above technical solutions, further, the top cover is detachably connected to the side panel.

[0019] In any of the above technical solutions, further, the side wall of the top cover is connected to the side plate through a pin.

[0020] Compared with the prior art, the beneficial effects of this application are:

[0021] The energy storage cabinet provided in the present application has replaceable side panels on the front, back, left and right sides and the top cover. Therefore, when the side panels or top cover of the cabinet are damaged or scratched, they can be replaced at any time to ensure aesthetics and practicality and meet customer usage needs. Moreover, only the damaged structure needs to be replaced, which does not affect the use of other structures and saves material costs.

[0022] In addition, the present application adopts a structure in which a panel and a sealing strip cooperate, replacing the foam sealing structure in the prior art. While effectively waterproofing, it reduces the thickness of the panel, contributes to lightweight design, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of the structure of the energy storage cabinet provided in the embodiment of the present application;

[0025] Figure 2 Another structural schematic diagram of the energy storage cabinet provided in an embodiment of the present application;

[0026] Figure 3 Another structural schematic diagram of the energy storage cabinet provided in the embodiment of the present application;

[0027] Figure 4 for Figure 3 Cross-sectional view along section AA;

[0028] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at B;

[0029] Figure 6 Another structural schematic diagram of the energy storage cabinet provided in the embodiment of the present application;

[0030] Figure 7 for Figure 6 Cross-sectional view along section CC;

[0031] Figure 8 for Figure 7 A schematic diagram of the enlarged structure at D;

[0032] Fig. 9 An assembly diagram of a rack and a base plate provided in an embodiment of the present application;

[0033] Fig.10 for Fig. 9 A schematic diagram of the enlarged structure at E;

[0034] Fig.11 Another assembly diagram of the rack and the base plate provided in the embodiment of the present application;

[0035] Fig.12 for Fig.11 A schematic diagram of the enlarged structure at F;

[0036] Fig.13 A schematic diagram of the structure of the side panel provided in the embodiment of the present application;

[0037] Fig.14 for Fig.13 Schematic diagram of the enlarged structure at G;

[0038] Fig.15 A schematic diagram of the structure of a longitudinal beam provided in an embodiment of the present application;

[0039] Fig.16 A schematic diagram of the structure of the top plate provided in the embodiment of the present application;

[0040] Fig.17 Another assembly diagram of the rack and the base plate provided in the embodiment of the present application;

[0041] Fig.18 for Fig.17 Schematic diagram of the enlarged structure at H;

[0042] Fig.19 Another structural schematic diagram of the energy storage cabinet provided in an embodiment of the present application.

[0043] Reference numerals:

[0044] 1-frame, 11-longitudinal beam, 111-clamping groove, 112-drainage groove, 12-top plate, 121-clamping part, 122-drainage outlet, 13-connecting piece, 131-installation base plate, 132-Z-shaped bending plate, 133-clamping protrusion, 14-connecting cross beam, 2-side plate, 21-hook, 22-limiting plate, 23-installation groove, 24-drainage hole, 3-top cover, 4-bottom plate, 41-bottom clamping protrusion, 5-side sealing strip, 6-top sealing strip, 7-pin, 8-drainage gap, 9-drainage channel, 10-second fastening member, 15-third fastening member. DETAILED DESCRIPTION

[0045] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0046] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. 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 application claimed, but merely represents the selected embodiments of the present application.

[0047] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0048] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] Refer to the following Figures 1 to 19 An energy storage cabinet according to some embodiments of the present application is described.

[0051] See also Figure 1 and Figure 2 As shown, an embodiment of the present application provides an energy storage cabinet, comprising: a frame 1, side panels 2 and a top cover 3; wherein, there are multiple side panels 2, and they are detachably installed on each side of the frame 1, that is, the number of sides of the frame 1 corresponds to the number of side panels 2, and one side panel 2 is installed on a corresponding side of the frame 1; the top cover 3 is detachably buckled on the top of the frame 1 and the side panels 2.

[0052] Based on the structure described above, it can be known that the energy storage cabinet provided in the present application has replaceable side panels 2 on the front, back, left and right sides and a top cover 3 on the top. Therefore, when the side panels 2 or top cover 3 of the cabinet are damaged or scratched, they can be replaced at any time to ensure aesthetics and practicality and meet customer usage needs. Moreover, only the damaged structure needs to be replaced, which does not affect the use of other structures and saves material costs.

[0053] In this embodiment, preferably, Figures 3 to 5 , Fig.13 , Fig.14 , Fig.17 and Fig.18 As shown, a hook 21 is formed on the top of the side plate 2 , and a clamping protrusion 133 is formed on the top of the frame 1 , and the hook 21 is clamped on the clamping protrusion 133 .

[0054] According to the structure described above, the side panel 2 is directly clamped on the side of the frame 1. Compared with the bolt locking structure, the operation is simpler and more convenient, which greatly shortens the operation time of the on-site operator. Moreover, the clamping structure is not exposed and does not affect the appearance.

[0055] Of course, the side panel 2 and the frame 1 may also adopt other snap-fit ​​structures. For example, the inner wall of the side panel 2 close to the frame 1 is provided with a snap buckle or a slot. Correspondingly, the side edge of the frame 1, that is, the longitudinal beam 11 described below, is provided with a corresponding snap buckle or a slot. The snap-fit ​​connection between the side panel 2 and the frame 1 can also be achieved through the cooperation of the snap buckle and the slot. In addition, the side panel 2 and the frame 1 are not only connected by snap-fitting, but the two can also be connected by a first fastening member such as a bolt, which is selected according to actual needs.

[0056] In this embodiment, preferably, Fig. 9 , Fig.11 , Figures 15 to 17 As shown, the frame 1 includes a longitudinal beam 11, a top plate 12 and a connecting member 13; wherein, there are multiple longitudinal beams 11, which are sequentially arranged at intervals and surround a supporting body;

[0057] The top plate 12 is arranged on the top of multiple longitudinal beams 11, and the top plate 12 forms a clamping portion 121, and a clamping groove 111 is formed between any two adjacent longitudinal beams 11, and the clamping portion 121 is clamped in the clamping groove 111; the connecting member 13 is arranged on the top of the top plate 12, and the connecting member 13 forms a clamping protrusion 133.

[0058] According to the structure described above, the longitudinal beam 11 and the top plate 12 are assembled together to form a supporting body, and the connecting member 13 is connected to the top plate 12 so that the connecting member 13 serves as a structure for clamping the side plate 2 .

[0059] Furthermore, preferably, the connector 13 and the top plate 12 are detachably connected by a second fastening member 10 such as screws or bolts. It can be seen that the top plate 12 and the plurality of longitudinal beams 11 are detachable, and the connector 13 and the top plate 12 are detachable. The rack 1 is a detachable structure, which is convenient for installation and disassembly, especially for later operation and maintenance. Of course, not limited to the above, the connector 13 and the top plate 12 can also be connected by non-detachable connection methods such as welding. In addition, in order to further strengthen the connection firmness between the top plate 12 and the longitudinal beams 11, the two can be further welded and fixed, which is selected according to actual needs.

[0060] Furthermore, preferably, the number of longitudinal beams 11 is four, and they are arranged to form a square structure. Correspondingly, the top plate 12 is a square plate. Of course, the number of longitudinal beams 11 is not limited to this, and can be less than four, such as three, or greater than four, such as five, six, seven, etc., depending on actual needs.

[0061] Further, preferably, Fig.15 As shown, a connecting crossbeam 14 can be provided between the two longitudinal beams 11 to play a reinforcing role.

[0062] Further, preferably, the cross section of the longitudinal beam 11 along the direction perpendicular to its height is bent and can be formed by bending.

[0063] Further, preferably, Fig.18 As shown, the connecting member 13 includes a connected mounting base plate 131 and a Z-shaped bending plate 132, and the mounting base plate 131 is connected to the top plate 12 by a second fastening member 10, and the top of the Z-shaped bending plate 132 along the height direction of the frame 1 is the aforementioned snap-on protrusion 133, and then the hook 21 of the side panel 2 is snap-on to the top of the Z-shaped bending plate 132 along its height direction.

[0064] In this embodiment, preferably, Fig.19 As shown, the energy storage cabinet further includes a base plate 4 , and the base plate 4 is installed at the bottom of the rack 1 .

[0065] According to the structure described above, the bottom plate 4 serves to seal the bottom of the cabinet and to prevent water and dust.

[0066] Further, preferably, Fig.17 As shown, the bottom plate 4 is arranged at the bottom of multiple longitudinal beams 11, and the bottom plate 4 is formed with a bottom clamping protrusion 41, and a clamping groove 111 is formed between any two adjacent longitudinal beams 11, and the bottom clamping protrusion 41 is clamped in the clamping groove 111, which is a detachable connection method and is easy to install and disassemble. In addition, in order to further strengthen the connection firmness between the top plate 12 and the longitudinal beam 11, the two can be further welded and fixed, which is selected according to actual needs.

[0067] In this embodiment, preferably, Fig.19 As shown, the bottom of the side plate 2 is bent to form a limiting plate 22 , and the limiting plate 22 abuts against the lower surface of the bottom plate 4 .

[0068] According to the structure described above, the limiting plate 22 at the bottom of the side plate 2 just abuts against the lower surface of the bottom plate 4, playing a role in fixing and limiting the side plate 2, making it more stable and firm to be assembled with the frame 1.

[0069] Further, preferably, the limit plate 22 is arranged perpendicularly to the side panel 2. When the cabinet is placed along the vertical direction, the side panel 2 is along the vertical direction, and the limit plate 22 is arranged along the horizontal direction. Of course, it is not limited to this and can also be designed according to actual needs.

[0070] Further, preferably, the limiting plate 22 and the side plate 2 are an integrated structure and are formed by bending. Of course, it is not limited to this and can also be designed according to actual needs.

[0071] In this embodiment, preferably, Fig.19 -As shown, the limiting plate 22 and the bottom plate 4 are detachably connected via a fastening member, namely a third fastening member 15 such as a screw or a bolt, which serves to reinforce the connection between the side plate 2 and the frame 1, making the side plate 2 more stable.

[0072] Of course, the connection method between the limiting plate 22 and the bottom plate 4 is not limited to the above, and the two can also be connected by means of a pin 7 or a buckle.

[0073] In this embodiment, preferably, Figures 6 to 12 As shown, the side edge of the frame 1, i.e., the longitudinal beam 11 mentioned above, is concavely formed with a drainage groove 112, and the drainage groove 112 extends along the height direction of the frame 1; the side opening of the drainage groove 112 is closed by the side plate 2 adjacent to the drainage groove 112 to form a drainage channel 9, and the bottom plate 4 is formed with a drainage hole 24 connected to the drainage channel 9.

[0074] According to the structure described above, the water entering from the top can be promptly drained from the bottom by using the drainage channel 9 and the drainage hole 24 to avoid damage to the products inside the cabinet.

[0075] Further, preferably, the top plate 12 is formed with a drain port 122 , and the drain port 122 is connected to the drain channel 9 , so as to avoid running water.

[0076] Furthermore, preferably, the cross-section of the drainage channel 9 along its height direction is square, which can drain a large amount of water and has a simple structure and is easy to process and manufacture. Of course, the cross-section of the drainage channel 9 along its height direction is not limited to this, and the cross-section can also be circular or other polygonal, depending on actual needs.

[0077] In this embodiment, preferably, Figure 8 As shown, the energy storage cabinet further includes a side sealing strip 5 , which is arranged on the side wall of the drainage groove 112 , and two sides of the side sealing strip 5 respectively abut against the inner wall of the side panel 2 adjacent to the drainage groove 112 .

[0078] According to the structure described above, the side sealing strip 5 seals the drainage groove 112, preventing the water in the drainage groove 112 from penetrating into the internal products through the side wall of the drainage groove 112, thereby protecting the products. In addition, since the present application adopts the structure of the sealing strip, replacing the foaming sealing structure in the prior art, the thickness of the cabinet panel can be greatly reduced, which is conducive to lightweight design and reduces material costs.

[0079] Further, preferably, the side sealing strip 5 includes a plurality of side sealing strips, and the number of the side sealing strips is the same as and corresponds to the number of the side walls of the drainage groove 112 , and each side wall of the drainage groove 112 is provided with a side sealing strip 5 .

[0080] Further, preferably, the side sealing strip 5 can be adhered to the side wall of the drainage groove 112 .

[0081] In this embodiment, preferably, Fig.11 and Fig.12 As shown, the energy storage cabinet further includes a top sealing strip 6, and each side edge of the top of the rack 1 is provided with a top sealing strip 6, and the top sealing strip 6 abuts against the inner wall of the side panel 2;

[0082] A drainage gap 8 is formed between the adjacent ends of any two adjacent top sealing strips 6 , and the drainage gap 8 is communicated with the top of the drainage groove 112 .

[0083] According to the structure described above, the top sealing strip 6 plays the role of top sealing and waterproofing, and plays the role of protecting the product, and a drainage gap 8 is arranged between two adjacent top sealing strips 6, and preferably, this drainage gap 8, the aforementioned drainage port 122 and the drainage groove 112 are corresponding and connected.

[0084] Further, preferably, the top sealing strip 6 is arranged on the upper surface of the top plate 12, and when the top plate 12 is a square plate, the number of the top sealing strips 6 is four.

[0085] Further, preferably, the top sealing strip 6 can be adhered to the top plate 12 .

[0086] In this embodiment, preferably, Figure 8 , Fig.13 and Fig.14 As shown, the outer wall of one of any two adjacent side panels 2 is concave to form a mounting groove 23, and the other of the two adjacent side panels 2 is bent to form a closed portion, and the closed portion is arranged in the mounting groove 23 and abuts against the inner wall of the mounting groove 23.

[0087] According to the structure described above, the overlapping of two adjacent side panels 2 further plays a waterproof role, and makes the assembly of the two more stable, and keeps them flush with other surfaces, which is more beautiful.

[0088] In this embodiment, preferably, Figure 2 As shown, the side wall of the top cover 3 is connected to the side plate 2 by a pin 7, which plays a role in positioning and reinforcing the connection. It is also a detachable installation method, which is convenient for later operation and maintenance.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An energy storage cabinet, characterized in that: include: A frame, side panels and a top cover; wherein the side panels are multiple in number and are detachably mounted on the respective sides of the frame; and the top cover is detachably buckled on the top of the frame and the side panels.

2. The energy storage cabinet according to claim 1, characterized in that: The side plate is clamped with the frame.

3. The energy storage cabinet according to claim 2, characterized in that: A hook is formed on the top of the side plate, a clamping protrusion is formed on the top of the frame, and the hook is clamped on the clamping protrusion.

4. The energy storage cabinet according to claim 3, characterized in that: The frame includes a longitudinal beam, a top plate and a connecting piece; wherein the longitudinal beams are in plurality and are sequentially arranged at intervals and surround a supporting body; The top plate is arranged at the top of the plurality of longitudinal beams, and a clamping portion is formed on the top plate, a clamping groove is formed between any two adjacent longitudinal beams, and the clamping portion is clamped in the clamping groove; the connecting member is arranged at the top of the top plate, and the connecting member is formed with the clamping protrusion.

5. The energy storage cabinet according to claim 1, characterized in that: The energy storage cabinet also includes a bottom plate, and the bottom plate is installed at the bottom of the frame.

6. The energy storage cabinet according to claim 5, characterized in that: The bottom of the side plate is bent to form a limiting plate, and the limiting plate abuts against the lower surface of the bottom plate.

7. The energy storage cabinet according to claim 6, characterized in that: The limiting plate is detachably connected to the bottom plate via a fastening member.

8. The energy storage cabinet according to claim 5, characterized in that: The side edges of the frame are concave to form a drainage groove, and the drainage groove extends along the height direction of the frame; The side opening of the drainage groove is closed by the side plate adjacent to the drainage groove to form a drainage channel, and the bottom plate is formed with a drainage hole connected to the drainage channel.

9. The energy storage cabinet according to claim 8, characterized in that: The energy storage cabinet further includes a side sealing strip, which is arranged on the side wall of the drainage groove, and two sides of the side sealing strip are respectively against the inner wall of the side plate adjacent to the drainage groove.

10. The energy storage cabinet according to claim 8, characterized in that: The energy storage cabinet further comprises a top sealing strip, each side edge of the top of the rack is provided with the top sealing strip, and the top sealing strip abuts against the inner wall of the side plate; A drainage gap is formed between the adjacent ends of any two adjacent top sealing strips, and the drainage gap is communicated with the top of the drainage groove.

11. The energy storage cabinet according to claim 1, characterized in that: The outer wall of any one of the two adjacent side panels is concave to form a mounting groove, and the other of the two adjacent side panels is bent to form a closed portion, and the closed portion is arranged in the mounting groove and abuts against the inner wall of the mounting groove.

12. The energy storage cabinet according to claim 1, characterized in that: The top cover is detachably connected to the side panels.

13. The energy storage cabinet according to claim 1, characterized in that: The side wall of the top cover is connected to the side plate through a pin.

Citation Information

Cited By

  • Integrated liquid cooling-air cooling composite heat dissipation energy storage cabinet

    CN121601872A