Sound insulation cover, compressor assembly and electric appliance

Abstract

The utility model provides a sound insulation cover, a compressor assembly and an electric appliance. The soundproof cover comprises a cover body; a plurality of folding panels; the sound-proof cover has a first state that all the folding panels are flatly laid on the plane where the access hole is located so as to close the access hole and a second state that all the folding panels are mutually stacked so as to open the access hole. According to the soundproof cover, the compressor assembly and the motor provided by the utility model, the cover body is provided with the access hole, and the access hole is controlled to be opened and closed by using the plurality of folding panels, so that the access hole can be reliably closed by using the folding panels to ensure the soundproof effect, and the soundproof cover can be switched to the second state to open the access hole to facilitate maintenance; therefore, the problems that in the prior art, the operation is complex due to the fact that the sound insulation cover needs to be disassembled, and the matched part of the self-tapping screw is prone to damage are solved, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of noise reduction structures, in particular to a sound insulation cover, a compressor assembly and an electrical appliance. Background Art

[0002] During the operation of a compressor, noise will be generated. To reduce the impact of the noise on the surrounding environment, it is usually necessary to perform sound insulation and noise reduction treatment on the compressor. Therefore, a compressor sound insulation device is designed, which includes a side wall extending axially and a cover plate arranged at the upper end of the side wall. The side wall and the cover plate are connected and form a compressor cavity for accommodating the compressor inside. An acoustic absorption layer is arranged on the inner wall of the compressor cavity; an opening is provided at the lower part of the compressor cavity, and the purpose of sound insulation and noise reduction of the compressor can be achieved by directly buckling the compressor through the opening.

[0003] However, in the prior art, a large number of fastening structures such as bolts, nuts, and self-tapping screws are required for the sound insulation cover to fix the side plate and the frame. The structure is complex. Especially when the compressor is being repaired, it is necessary to disassemble the bolts, nuts, and self-tapping screws, which seriously increases the repair operation and repair time of the user and reduces the user experience. Summary of the Utility Model

[0004] In order to solve the technical problem that the sound insulation cover in the prior art is difficult to disassemble and assemble, which is not convenient for repairing the device inside the sound insulation cover and affects the user experience, a sound insulation cover, a compressor assembly and an electrical appliance are provided, which use a plurality of folding panels to adjust the repair opening in a way of laying flat and closing and folding and opening to facilitate repair.

[0005] A sound insulation cover includes:

[0006] A housing, on which a repair opening is provided;

[0007] A plurality of folding panels, all the folding panels are connected in sequence, and a hinge shaft is arranged between two adjacent folding panels;

[0008] The sound insulation cover has a first state in which all the folding panels are laid flat on the plane where the repair opening is located to close the repair opening and a second state in which all the folding panels are stacked on each other to open the repair opening.

[0009] The sound insulation cover further includes a guide rail, the guide rail is arranged on the housing, and part of the hinge shafts are slidably arranged on the guide rail.

[0010] The guide rail includes an upper guide rail and a lower guide rail. The upper guide rail is arranged at the upper edge of the repair opening, the lower guide rail is arranged at the lower edge of the repair opening, the upper end of the hinge shaft is slidably matched with the upper guide rail, and the lower end of the hinge shaft is slidably matched with the lower guide rail.

[0011] The hinge shaft includes a first hinge shaft and a second hinge shaft. Every two folding panels form a folding panel group. Two folding panels in the same folding panel group are hinged and cooperated through the first hinge shaft. Adjacent two folding panel groups are hinged and cooperated through the second hinge shaft. The second hinge shaft is in sliding cooperation with the guide rail.

[0012] A chute is arranged at the end of the second hinge shaft. The chute is in sliding cooperation with the guide rail.

[0013] The folding panel has opposite first edge and second edge. Among two adjacent folding panels, the first edge of one folding panel is hinged and cooperated with the second edge of the other folding panel through the hinge shaft.

[0014] A groove is formed on the first edge. A protrusion is formed on the second edge. The protrusion can extend into the groove. The hinge shaft sequentially passes through the groove and the protrusion.

[0015] The sound insulation cover further includes a frame. The guide rail constitutes a cross beam of the frame.

[0016] The frame further includes a column assembly. The column assembly is located at the corner of the cover body. The end of the guide rail is detachably connected with the column assembly. And the folding panel at the end is magnetically connected with the column assembly.

[0017] The column assembly includes an outer column and an inner column. The inner column is located on one side of the outer column facing the inside of the cover body. And the outer column and the inner column are detachably connected. There is a first spacing between the outer column and the inner column. The end of the folding panel is detachably arranged in the first spacing.

[0018] The frame further includes a cross beam. A pressing plate is arranged at the end of the inner column. The end of the cross beam is located between the pressing plate and the outer column. The pressing plate is detachably connected with the outer column. And the pressing plate can extrude the cross beam towards the outer column.

[0019] A magnetic structure is arranged on the outer column. The magnetic structure is in magnetic cooperation with the side plate of the cover body.

[0020] Polyurethane material is arranged inside the folding panel.

[0021] A sound absorption structure is arranged between two adjacent folding panels.

[0022] The folded panels of a part form the left door body, and the folded panels of the remaining part form the right door body. When the sound insulation cover is in the first state, the left door body and the right door body jointly close the maintenance opening. And when the sound insulation cover is in the second state, all the folded panels forming the left door body fold towards the left end of the maintenance opening, and all the folded panels forming the right door body fold towards the right end of the maintenance opening.

[0023] The sound insulation cover further includes handles, and the handles are provided on both the left door body and the right door body. When the sound insulation cover is in the first state, the two handles are detachably connected.

[0024] A compressor assembly includes the above-mentioned sound insulation cover.

[0025] An electrical appliance includes the above-mentioned sound insulation cover.

[0026] The sound insulation cover, the compressor assembly and the motor provided by the present utility model are provided with a maintenance opening on the cover body, and the opening and closing of the maintenance opening are controlled by a plurality of folded panels. It can not only reliably close the maintenance opening by the folded panels to ensure the sound insulation effect, but also switch the sound insulation cover to the second state to open the maintenance opening for convenient maintenance, thus avoiding the problems in the prior art that the sound insulation cover needs to be disassembled, resulting in complex operation and easy damage to the mating parts of the self-tapping screws, and improving the user experience. Description of the Drawings

[0027] Figure 1 It is a schematic structural diagram of the sound insulation cover in the first state provided by an embodiment of the present utility model;

[0028] Figure 2 It is a schematic structural diagram of the sound insulation cover in the second state provided by an embodiment of the present utility model;

[0029] Figure 3 It is an exploded view of the sound insulation cover provided by an embodiment of the present utility model;

[0030] Figure 4 It is an exploded view of the folded panel, the first hinge shaft and the second hinge shaft provided by an embodiment of the present utility model;

[0031] Figure 5 It is a schematic structural diagram of the outer column provided by an embodiment of the present utility model;

[0032] Figure 6 It is a schematic structural diagram of the inner column provided by an embodiment of the present utility model;

[0033] Figure 7 It is a schematic diagram of the cooperation between the outer column, the inner column and the cross beam provided by an embodiment of the present utility model;

[0034] In the figure:

[0035] 1. Cover body; 11. Maintenance opening; 2. Folding panel; 31. Upper guide rail; 32. Lower guide rail; 41. First hinge shaft; 42. Second hinge shaft; 21. First edge; 22. Second edge; 23. Groove; 24. Protrusion; 12. Outer column; 13. Inner column; 5. Handle. Detailed implementation manners

[0036] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0037] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0038] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances, so as to describe the embodiments of the present utility model herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0039] It should be noted that in the description of the present utility model, the terms indicating directions or positional relationships such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0040] In addition, it should be noted that in the description of the present utility model, unless otherwise clearly specified and defined, the terms "installation", "setting", and "connection" 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 directly connected, indirectly connected through an intermediate medium, or the internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] In the prior art, a large number of fastening structures such as bolts, nuts, and self-tapping screws are required for the sound insulation cover to fix the side plates and the frame. The structure is complex. Especially when the compressor is being repaired, the bolts, nuts, and self-tapping screws need to be disassembled, which seriously increases the repair operation and repair time of the user and reduces the user experience. Therefore, this application provides a sound insulation cover as Figures 1 to 7 shown, including: a cover body 1, on which a maintenance opening 11 is provided; a plurality of folding panels 2, all the folding panels 2 are connected in sequence, and a hinge shaft is provided between adjacent two folding panels 2. Based on the reliable connection of adjacent two folding panels 2 by the hinge shaft, the two folding panels 2 can rotate relative to each other, so as to achieve the effect of mutual stacking; the sound insulation cover has a first state in which all the folding panels 2 are laid flat on the plane where the maintenance opening 11 is located to close the maintenance opening 11 and a second state in which all the folding panels 2 are stacked on each other to open the maintenance opening 11. By providing the maintenance opening 11 on the cover body 1 and controlling the opening and closing of the maintenance opening 11 by using a plurality of folding panels 2, not only can the maintenance opening 11 be reliably closed by the folding panels 2 to ensure the sound insulation effect, but also the sound insulation cover can be switched to the second state to open the maintenance opening 11 for convenient maintenance, thus avoiding the problems of complex operation and easy damage of the mating part of the self-tapping screw caused by the need to disassemble the sound insulation cover in the prior art and improving the user experience.

[0042] During use, the sound insulation cover is covered on the structure to be noise-reduced. When the sound insulation cover is in the first state, at this time all the folding panels 2 are laid flat at the maintenance opening 11, so that the maintenance opening 11 can be shielded. At this time, the inside and outside of the sound insulation cover are relatively closed, ensuring the sound insulation and noise reduction effect of the sound insulation cover; when the sound insulation cover is in the second state, at this time the folding panels 2 are stacked on each other to open the maintenance opening 11, and the user can directly repair the structure to be noise-reduced inside the sound insulation cover through the maintenance opening 11 without disassembling the plate body of the sound insulation cover, etc., thus reducing the operation difficulty of the maintenance and improving the user experience.

[0043] Specifically, the sound insulation cover further includes a guide rail, which is arranged on the cover body 1, and part of the hinge shaft is slidably arranged on the guide rail. By using the guide rail to limit the movement of the hinge shaft, the folding panel 2 can be folded in a set direction, so as to ensure the reliable adjustment of the shielding and opening of the inspection opening 11 by the folding panel 2.

[0044] Furthermore, the guide rail includes an upper guide rail 31 and a lower guide rail 32. The upper guide rail 31 is arranged at the upper edge of the inspection opening 11, and the lower guide rail 32 is arranged at the lower edge of the inspection opening 11. The upper end of the hinge shaft is slidably matched with the upper guide rail 31, and the lower end of the hinge shaft is slidably matched with the lower guide rail 32. By using the upper guide rail 31 and the lower guide rail 32 to limit the upper end and the lower end of the hinge shaft respectively, it is further ensured that the folding panel 2 can be folded in a set direction, so as to ensure the reliable adjustment of the shielding and opening of the inspection opening 11 by the folding panel 2.

[0045] The hinge shaft includes a first hinge shaft 41 and a second hinge shaft 42. Every two folding panels 2 form a folding panel group. The two folding panels 2 in the same folding panel group are hinged together through the first hinge shaft 41. The adjacent two folding panel groups are hinged together through the second hinge shaft 42, and the second hinge shaft 42 is slidably matched with the guide rail. The first hinge shaft 41 is only used to hinge the two folding panels 2 in the same folding panel group, while the second hinge shaft 42 can not only hinge the two folding panels 2 in the same folding panel group, but also cooperate with the guide rail to limit the movement path of the folding panel 2. When all the folding panels 2 are laid flat, the first hinge shaft 41, the second hinge shaft 42 and the guide rail are all in the same plane. When the folding panels 2 are stacked on each other, the first hinge shaft 41 will protrude out of the plane where the guide rail is located, so that the two folding panels 2 in the same folding panel group can be stacked relatively. At this time, the second hinge shaft 42 is still in the plane where the guide rail is located under the limitation of the guide rail, ensuring the reliable position of the folding panel 2 when it is stacked relatively.

[0046] A chute is arranged at the end of the second hinge shaft 42, and the chute is slidably matched with the guide rail to ensure the reliable sliding match between the second hinge shaft 42 and the guide rail. Specifically, the guide rail includes a U-shaped installation groove and a slide rail located in the middle of the installation groove. The second hinge shaft 42 is arranged in the installation groove, and the chute is matched with the slide rail. The inner surface of the U-shaped installation groove can abut and limit the outer wall of the second hinge shaft 42, and at the same time, the slide rail can abut and limit the inner surface of the chute, ensuring the cooperation reliability between the second hinge shaft 42 and the guide rail.

[0047] The folding panel 2 has opposite first and second edges 21 and 22. In two adjacent folding panels 2, the first edge 21 of one folding panel 2 is hinged to the second edge 22 of the other folding panel 2 through the hinge shaft. Since both the first edge 21 and the second edge 22 are hinged to the same hinge shaft, the distance between the folding panels 2 can be minimized as much as possible, the sealing fit effect between the folding panels 2 can be improved, and further the sealing and sound insulation effect of the sound insulation cover can be improved.

[0048] Specifically, a groove 23 is formed on the first edge 21, and a protrusion 24 is formed on the second edge 22. The protrusion 24 can extend into the groove 23, and the hinge shaft sequentially passes through the groove 23 and the protrusion 24. By using the cooperation of the groove 23 and the protrusion 24, the installation of the hinge shaft is facilitated, and at the same time, the gap between two adjacent folding panels 2 can be adjusted to a continuous U shape, further improving the sealing fit effect between the folding panels 2.

[0049] The sound insulation cover further includes a frame. The guide rail constitutes the cross beam of the frame, that is, at this time, one side of the frame is an inspection opening 11. When assembling the sound insulation cover, the installation of part of the frame can be directly realized by installing the guide rail, further reducing the structural complexity of the frame and improving the disassembly and assembly efficiency of the sound insulation cover.

[0050] The frame further includes a column assembly. The column assembly is located at the corner of the cover body 1. The end of the guide rail is detachably connected to the column assembly, and the folding panel 2 at the end is magnetically connected to the column assembly. By setting the column assembly and the guide rail to be detachably connected, the disassembly and assembly difficulty of the sound insulation cover is reduced. At the same time, by setting the folding panel 2 and the column assembly to be magnetically connected, when installing the sound insulation cover, after connecting the column assembly and the lower guide rail 32, the folding panel 2 can be placed on the lower guide rail 32, and then the folding panel 2 is slid towards the column assembly, so that the folding panel 2 is magnetically adsorbed to the column assembly, completing the positioning and installation of the folding panel 2.

[0051] Specifically, the column assembly includes an outer column 12 and an inner column 13. The inner column 13 is located on the side of the outer column 12 facing the inside of the cover body 1, and the outer column 12 and the inner column 13 are detachably connected. There is a first distance between the outer column 12 and the inner column 13, and the end of the folding panel 2 is detachably arranged in the first distance. By using the cooperation of the inner column 13 and the outer column 12, multi-directional limiting of the folding panel 2 in the non-guide rail direction is realized, so that the fixing of the folding panel 2 can be ensured to be reliable.

[0052] Preferably, the outer column 12 has a first side surface and a second side surface connected to each other. The first magnetic structure is provided on both the first side surface and the second side surface. The first side surface is magnetically engaged with the second magnetic structure on the first surface of the folding panel 2 through the first magnetic structure, and the second side surface is magnetically engaged with the second magnetic structure on the second surface of the folding panel 2 through the first magnetic structure. That is, through the first magnetic structures on the first side surface and the second side surface, the magnetic engagement in different orientations on the folding panel 2 is used to ensure reliable fixation and positioning of the folding panel 2.

[0053] The frame further includes a cross beam. A pressing plate is provided at the end of the inner column 13. The end of the cross beam is located between the pressing plate and the outer column 12. The pressing plate is detachably connected to the outer column 12, and the pressing plate can squeeze the cross beam towards the outer column 12. When assembling the sound insulation cover, place the cross beam at the end of the column, then place the inner column 13 from the inside, and make the pressing plate located above the cross beam, and then connect the pressing plate to the outer column 12, thereby completing the installation between the column assembly and the cross beam. At this time, the entire installation process of the frame is only to move the cross beam, connect the pressing plate and the outer column 12, effectively reducing the complexity of the assembly operation, shortening the disassembly and assembly time, and at the same time avoiding the problem that the sound insulation cover cannot be used again after being removed due to the use of self-tapping screws.

[0054] As Figure 5 and 6 shown, the cross-section of the outer column 12 and the cross-section of the inner column 13 are also L-shaped. The two L-shapes can enclose an L-shaped installation channel, and the end of the side plate of the sound insulation cover can extend into the L-shaped installation channel to complete the installation of the side plate. When the side plate is the folding panel 2, the end of the folding panel 2 can also be installed into the installation channel.

[0055] A bearing plate is provided at the bottom of the outer column 12, and the end of the lower cross beam can be arranged on the bearing plate to complete the connection between the lower cross beam and the outer column 12.

[0056] Positioning columns are also provided on the bearing plate, and positioning holes are provided on the inner column 13. The positioning columns and the positioning holes cooperate with each other to realize the positioning cooperation between the inner column 13 and the outer column 12. Similarly, a guiding plate is formed on the pressing plate, and the guiding plate can be in positioning cooperation with the outer surface of the outer column 12, so as to realize the positioning cooperation between the inner column 13 and the outer column 12 from the height direction of the inner column 13.

[0057] A magnetic structure is provided on the outer column 12, and the magnetic structure is magnetically engaged with the side plate of the cover body 1. The magnetic structure is used to facilitate the positioning and fixation of the outer column 12 and the side plate.

[0058] During the installation of the sound insulation cover, the lower crossbeam is placed on the bearing plate of the corresponding outer column 12, thus completing the lower layer structure of the frame;

[0059] Install the side plates of the sound insulation cover on the outer column 12 and the lower crossbeam, and make the ends of the side plates magnetically cooperate with the outer column 12. When the side plate is composed of the folding panel 2, make the folding panel 2 at the end magnetically cooperate with the corresponding outer column 12;

[0060] Then, set the upper crossbeam on the top of the side plate and the outer column 12, so that the upper crossbeam is located on the top of the side plate, and the end of the upper crossbeam is set on the upper end of the outer column 12;

[0061] Finally, install the inner column 13, make the inner column 13 engage and cooperate with the outer column 12, the positioning hole and the positioning post are positioned and cooperate, the guide plate and the outer surface of the outer column 12 are positioned and cooperate. At the same time, the pressing plate on the inner column 13 can be pressed above the upper crossbeam, and finally the pressing plate is engaged and cooperated with the outer column 12, then the installation of the whole sound insulation cover can be completed. As Figure 7 shown, set a hook on the pressing plate of the inner column, and use a buckle structure (not shown in the figure) to fix the outer column 12 and the inner column 13 by clamping.

[0062] In order to avoid the inconvenient installation due to the too large size of the side plate of the sound insulation cover, the side plate without the inspection port 11 on the sound insulation cover is composed of at least two splicing panels, and the adjacent two splicing panels are magnetically cooperated.

[0063] The folding panel 2 is provided with polyurethane material. The polyurethane material is used to improve the sound insulation effect of the folding panel 2.

[0064] An acoustic absorption structure is arranged between two adjacent folding panels 2. When the sound insulation cover is in the first state, the gap between the folding panels 2 can be filled by the attracting structure to improve the sound insulation effect of the sound insulation cover. Preferably, the attracting structure is compressible acoustic absorption sponge.

[0065] Part of the folding panels form the left door body, and the remaining folding panels form the right door body. When the sound insulation cover is in the first state, the left door body and the right door body jointly close the inspection port 11, and when the sound insulation cover is in the second state, all the folding panels 2 forming the left door body fold to the left end of the inspection port 11, and all the folding panels 2 forming the right door body fold to the right end of the inspection port 11. At this time, the inspection door of the sound insulation cover is a left-right split structure, reducing the length size of the left door body and the right door body, thereby reducing the use difficulty of the user during the process of moving and stacking the folding panels 2, and improving the user experience.

[0066] The sound insulation cover further includes a handle 5, and the handle 5 is provided on both the left door body and the right door body. When the sound insulation cover is in the first state, the two handles 5 are detachably connected. The handle 5 can facilitate the user's operation of the left door body and the right door body, and can also improve the sealing effect of the maintenance opening 11 when the two handles 5 are detachably connected when the sound insulation cover is in the first state. Preferably, the two handles 5 are magnetically engaged.

[0067] A compressor assembly includes the above-mentioned sound insulation cover.

[0068] An electrical appliance includes the above-mentioned sound insulation cover.

[0069] The above embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the appended claims.

Claims

1. A sound insulation cover, characterized in that: Comprising: A cover body (1) provided with an inspection opening (11) thereon; A plurality of folding panels (2), all the folding panels (2) are connected in sequence, and a hinge shaft is provided between two adjacent folding panels (2); The sound insulation cover has a first state in which all the folding panels (2) are laid flat on the plane where the inspection opening (11) is located to close the inspection opening (11), and a second state in which all the folding panels (2) are stacked on each other to open the inspection opening (11).

2. The sound insulation cover according to claim 1, characterized in that: The sound insulation cover further includes guide rails which are arranged on the cover body (1), and part of the hinge shafts are slidably arranged on the guide rails.

3. The sound insulation cover according to claim 2, wherein: The guide rails include an upper guide rail (31) and a lower guide rail (32). The upper guide rail (31) is arranged at the upper edge of the inspection opening (11), and the lower guide rail (32) is arranged at the lower edge of the inspection opening (11). The upper end of the hinge shaft is slidably matched with the upper guide rail (31), and the lower end of the hinge shaft is slidably matched with the lower guide rail (32).

4. The sound insulation cover according to claim 2, characterized in that: The hinge shaft includes a first hinge shaft (41) and a second hinge shaft (42). Every two folding panels (2) form a folding panel group. The two folding panels (2) in the same folding panel group are hinged together through the first hinge shaft (41), and adjacent folding panel groups are hinged together through the second hinge shaft (42). The second hinge shaft (42) is slidably matched with the guide rail.

5. The sound insulation cover according to claim 4, characterized in that: A chute is arranged at the end of the second hinge shaft (42), and the chute is slidably matched with the guide rail.

6. The sound insulation cover according to claim 1, characterized in that: The folding panel (2) has opposite first and second edges (21, 22). In two adjacent folding panels (2), the first edge (21) of one folding panel (2) is hinged to the second edge (22) of the other folding panel (2) through the hinge shaft.

7. The sound insulation cover according to claim 6, characterized in that: A groove (23) is formed on the first edge (21), and a protrusion (24) is formed on the second edge (22). The protrusion (24) can extend into the groove (23), and the hinge shaft sequentially passes through the groove (23) and the protrusion (24).

8. The sound insulation cover according to claim 2, wherein: The sound insulation cover further includes a frame, and the guide rails form the cross beams of the frame.

9. The sound insulation cover according to claim 8, characterized in that: The frame further includes a column assembly which is located at the corner of the cover body (1). The end of the guide rail is detachably connected to the column assembly, and the folding panel (2) at the end is magnetically connected to the column assembly.

10. The sound insulation cover according to claim 9, characterized in that: The column assembly includes an outer column (12) and an inner column (13). The inner column (13) is located on the side of the outer column (12) facing the inside of the cover body (1), and the outer column (12) and the inner column (13) are detachably connected. There is a first distance between the outer column (12) and the inner column (13), and the end of the folding panel (2) is detachably arranged within the first distance.

11. The sound insulation cover according to claim 10, wherein: The frame further includes a cross beam. A pressing plate is provided at the end of the inner column (13). The end of the cross beam is located between the pressing plate and the outer column (12). The pressing plate is detachably connected to the outer column (12), and the pressing plate can squeeze the cross beam towards the outer column (12).

12. The sound insulation cover according to claim 11, characterized in that: A magnetic structure is provided on the outer column (12), and the magnetic structure is magnetically matched with the side plate of the cover body (1).

13. The sound insulation cover according to claim 1, characterized in that: The folding panel (2) is internally provided with a polyurethane material.

14. The sound insulation cover according to claim 1, characterized in that: A sound absorption structure is provided between two adjacent folding panels (2).

15. The sound insulation cover according to claim 1, characterized in that: Some of the folding panels form a left door body, and the remaining folding panels form a right door body. When the sound insulation cover is in the first state, the left door body and the right door body jointly close the maintenance opening (11). When the sound insulation cover is in the second state, all the folding panels (2) forming the left door body fold towards the left end of the maintenance opening (11), and all the folding panels (2) forming the right door body fold towards the right end of the maintenance opening (11).

16. The sound insulation cover according to claim 15, characterized in that: The sound insulation cover further includes a handle (5). The handle (5) is provided on both the left door body and the right door body. When the sound insulation cover is in the first state, the two handles (5) are detachably connected.

17. A compressor assembly, characterized in that: Including the sound insulation cover according to any one of claims 1 to 16.

18. An electrical appliance, characterized in that: Including the sound insulation cover according to any one of claims 1 to 16.

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