Return air frame assembly and air conditioning equipment

Abstract

The present disclosure relates to a return air frame assembly and an air conditioning device. The return air frame assembly includes: a first cover plate and a second cover plate, which are oppositely arranged along a first direction; an electrical box body, including a first plate and a second plate. The first plate is located between the first cover plate and the second cover plate, and the first plate is located at an end of the second cover plate along a second direction for mounting a circuit board; the second plate is angularly connected to an end of the first plate along a third direction; and an electrical box cover, which is buckled on a side of the electrical box body away from the second cover plate and forms a cavity, including a third plate and a fourth plate. The third plate is oppositely arranged with the first plate along the second direction, and the fourth plate is angularly connected to an end of the third plate along the first direction close to the second cover plate; the second plate extends towards a direction away from the second cover plate and abuts against the third plate. A first groove is provided at an end of the second plate away from the first plate, and a first flanging is provided on a side edge thereof. The first flanging is angularly arranged with the second plate. The fourth plate extends towards the second cover plate and abuts against an end of the second cover plate.

Description

Technical Field

[0001] The present disclosure relates to the technical field of air conditioning equipment, and particularly relates to a return air frame assembly and an air conditioner. Background Art

[0002] A duct machine, which is short for a concealed air conditioner, can also be called an air conditioner duct machine or a duct machine air conditioner. The duct machine air conditioner is inexpensive, easy to maintain, and suitable for the air conditioner usage habits of Chinese people, and is widely used.

[0003] Currently, in the prior art, the electrical boxes of duct machines are mainly divided into two installation methods: hanging type and concealed type. The hanging electrical box mainly has a five-sided box structure as the main body, and is equipped with an installation flat electrical box cover. The main body houses controller parts such as a main board, and feet are added at the rear to fix the main body to the side of the duct machine with screws. The structure is simple, but the box body is independent of the shell, lacking aesthetics.

[0004] The main body part of the concealed electrical box usually does not have five sides, but three sides or two sides. The missing part is provided by the electrical box cover, side plates, or upper and lower cover plates. The box body participates in the composition of the entire shell, making the appearance of the whole machine small, flexible, regular, and beautiful, and gradually becoming the industry trend. However, since the box body itself lacks multi-sided support compared to the hanging type, the strength is insufficient. However, because it directly participates in the composition of the shell, it is greatly affected by assembly, vibration, and dropping, etc., and it is difficult to ensure the structural strength of the electrical box. Summary of the Invention

[0005] The present disclosure provides a return air frame assembly and an air conditioner, which can improve the structural strength of the electrical box.

[0006] The first aspect of the present disclosure provides a return air frame assembly, including:

[0007] A first cover plate;

[0008] A second cover plate, which is disposed opposite to the first cover plate along a first direction;

[0009] An electrical box body. The return air frame assembly includes a first plate and a second plate. The first plate is located between the first cover plate and the second cover plate, and the first plate is located at the end of the second cover plate along a second direction for installing a circuit board. The second plate is angularly connected to the end of the first plate along a third direction. The second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction and the second direction; and

[0010] An electrical box cover, which is buckled on the side of the electrical box body away from the second cover plate to form a cavity. The electrical box cover includes a third plate and a fourth plate. The third plate is disposed opposite to the first plate along the second direction, and the fourth plate is angularly connected to one end of the third plate along the first direction close to the second cover plate;

[0011] Among them, the second plate extends in a direction away from the second cover plate and abuts against the third plate. A first groove is provided at one end of the second plate away from the first plate. A first hem is provided on the side edge of the first groove. The first hem is disposed at an angle with the second plate. The fourth plate extends toward the second cover plate and abuts against the end of the second cover plate.

[0012] In some embodiments, the return air frame assembly further includes a wire fixing member, which is installed on the inner side of the second plate through a fastener and is used for limiting the wires led out from the circuit board.

[0013] In some embodiments, the first groove has a first side wall, a second side wall and a third side wall. The first ends of the first side wall and the second side wall are connected by the third side wall to form a groove bottom. An opening is formed between the second ends of the first side wall and the second side wall. The width of the first groove at the opening is greater than the width of the groove bottom.

[0014] In some embodiments, the width of the first groove gradually decreases from the opening to the groove bottom to form a trapezoidal groove.

[0015] In some embodiments, the first hem is bent toward the inner side of the second plate.

[0016] In some embodiments, at the length section of the groove bottom of the first groove, a first overlapping edge is provided on the side of the first hem away from the second plate. The first overlapping edge is stacked on the inner side of the first hem.

[0017] In some embodiments, at both edges of the end of the second plate away from the first plate on both sides of the first groove, second hems are provided. The second hems are located inside the third plate and are used for transitional connection with the third plate.

[0018] In some embodiments, the bending width of the first hem relative to the second plate is less than the folding-back width of the second hem relative to the second plate.

[0019] In some embodiments, third hems and fourth hems are respectively provided on two adjacent sides of the second plate adjacent to the first plate. The third hem is disposed at an angle with the second plate and abuts against the first cover plate. The fourth hem is disposed at an angle with the second plate and abuts against the second cover plate.

[0020] In some embodiments, a bracket is further included. The bracket includes a first mounting plate and a second mounting plate connected at an angle. The first mounting plate is welded to the area of the first plate facing away from the second plate and extends along the first direction. The second mounting plate extends in a direction away from the second plate;

[0021] The first cover plate includes a first main body plate and a first flanging. The first flanging is at least provided at one end of the first main body plate close to the second plate along the third direction. The first flanging is located outside the second mounting plate and is connected to one end of the second mounting plate;

[0022] The second cover plate includes a second main body plate and a second flanging. The second flanging is provided at least at one end of the first main body plate close to the second plate along the third direction. The second flanging is located outside the second mounting plate and is connected to the other end of the second mounting plate.

[0023] In some embodiments, a pressing portion is provided on the first cover plate. The pressing portion protrudes integrally towards the inner side of the first cover plate. A second groove for accommodating the pressing portion is provided on the first side of the first plate close to the first cover plate.

[0024] In some embodiments, a third groove for passing a wire is provided on the first side of the first plate close to the first cover plate. A fifth flanging is provided in the area of the first side outside the third groove. The fifth flanging forms an angle with the first plate and extends in a direction away from the second plate.

[0025] In some embodiments, a protrusion is provided at the position of the bottom of the third groove on the fifth flanging. The protrusion extends towards the outside of the fifth flanging and is used for selectively fixing to the first cover plate.

[0026] In some embodiments, a second overlapping edge is provided on the inner side wall of the third groove. The second overlapping edge is stacked on the side of the first plate away from the electrical box cover.

[0027] In some embodiments, a wire passing hole is provided on the first plate for guiding the wire of the fan in the return air frame assembly to the circuit board. A third overlapping edge is provided at the edge of the wire passing hole. The third overlapping edge is stacked on the side of the first plate away from the electrical box cover.

[0028] In some embodiments, a fourth groove is provided on the second side of the first plate close to the second cover plate for guiding the wire of the ambient temperature sensor to the circuit board. Sixth flangings are provided on both parts of the second side on both sides of the fourth groove. The sixth flangings form an angle with the first plate and extend in a direction away from the second plate.

[0029] In some embodiments, the fourth groove has a first edge, a second edge and a third edge. The first edge and the second edge are oppositely arranged, and the first ends of the first edge and the second edge are connected by the third edge respectively. An opening is formed between the second ends respectively. Seventh flangings are provided on the first edge, the second edge and the third edge. The seventh flangings form an angle with the first plate and extend in a direction away from the second plate.

[0030] In some embodiments, the seventh flangings corresponding to the first edge, the second edge and the third edge are independent of each other.

[0031] In some embodiments, the seventh flanging is trapezoidal, and the width of the top of the seventh flanging is smaller than the width of the root.

[0032] The second aspect of the present disclosure provides an air conditioning device, including the return air frame assembly of the above embodiments.

[0033] In some embodiments, the air conditioning device includes a ducted air conditioner or a ceiling-mounted air conditioner.

[0034] In the return air frame assembly of the embodiments of the present disclosure, the electrical box body is designed as an L-shaped structure, which can realize the miniaturization and dexterity of the overall structure of the electrical box. The part structure is simple, which is convenient for manufacturing and assembly. Moreover, the first plate is used for installing electrical components. When installing electrical components, some auxiliary structures such as wire fixing parts need to be installed on the second plate, and holes also need to be drilled. By providing a first groove at the free end of the second plate and a first folding edge on the inner edge of the first groove, the anti-deformation ability of the second plate can be greatly improved, thereby improving the overall structural strength of the battery box, with less deformation when affected by assembly, vibration or dropping, reducing the manufacturing cost while meeting the expected functions of the electrical box, and improving the production efficiency. Description of the Drawings

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 It is an exploded view of some embodiments of the return air frame assembly of the present disclosure.

[0037] Figure 2 It is a schematic structural diagram of some embodiments of the return air frame assembly of the present disclosure.

[0038] Figure 3 It is a first-angle schematic view of some embodiments of the electrical box body in the return air frame assembly of the present disclosure.

[0039] Figure 4 It is a second-angle schematic view of some embodiments of the electrical box body in the return air frame assembly of the present disclosure.

[0040] Figure 5 It is a first-angle schematic view of the fixing plate installed on the electrical box body.

[0041] Figure 6 It is a second-angle schematic view of the fixing plate installed on the electrical box body. Detailed Embodiments

[0042] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation on the present disclosure and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts belong to the scope of protection of the present disclosure.

[0043] Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and devices should be regarded as part of the specification.

[0044] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "center", "transverse", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present disclosure 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 should not be construed as limiting the scope of protection of the present disclosure.

[0045] In the description of the present disclosure, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Without further statement, the above terms have no special meaning, and therefore should not be construed as limiting the scope of protection of the present disclosure.

[0046] As Figures 1 to 6 , the present disclosure provides a return air frame assembly. In some embodiments, it includes:

[0047] A first cover plate 1;

[0048] A second cover plate 2, which is disposed opposite to the first cover plate 1 along the first direction z;

[0049] An electrical box body 3, including a first plate 31 and a second plate 32. The first plate 31 is located between the first cover plate 1 and the second cover plate 2, and the first plate 31 is located at the end of the second cover plate 2 along the second direction x. The first plate 31 is used for installing a circuit board. The second plate 32 is angularly connected to the end of the first plate 31 along the third direction y. The second direction x is perpendicular to the first direction z, and the third direction y is perpendicular to the first direction z and the second direction x; and

[0050] The electrical box cover 4 is buckled on one side of the electrical box body 3 away from the second cover plate 2 to form a cavity. The electrical box cover 4 includes a third plate 41 and a fourth plate 42. The third plate 41 is disposed opposite to the first plate 31 along the second direction x. The fourth plate 42 is angularly connected to one end of the third plate 41 close to the second cover plate 2 along the first direction z.

[0051] Wherein, the second plate 32 extends in a direction away from the second cover plate 2 and abuts against the third plate 41. One end of the second plate 32 away from the first plate 31 is provided with a first groove 321. A first folded edge 322 is provided on the side edge of the first groove 321. The first folded edge 322 is disposed at an angle to the second plate 32.

[0052] For example, in the installed state, the first cover plate 1 is the upper cover plate, and the second cover plate 2 is the return air cover plate. Both the first cover plate 1 and the second cover plate 2 can be rectangular plate-like structures.

[0053] Along the second direction x, the length of the first cover plate 1 is greater than the length of the second cover plate 2. One end of the first cover plate 1 is aligned with one end of the second cover plate 2, and the other end of the first cover plate 1 extends beyond the second cover plate 2. The electrical box occupies the length area where the first cover plate 1 extends beyond the second cover plate 2. The first cover plate 1 forms one surface of the electrical box.

[0054] Along the third direction y, the width of the first cover plate 1 is greater than the width of the second cover plate 2. One side of the first cover plate 1 is aligned with one side of the second cover plate 2, and the other side of the first cover plate 1 extends beyond the second cover plate 2. The electrical box is located on the side where the first cover plate 1 and the second cover plate 2 are aligned. The second plate 32 is located at a position of the first plate 31 close to the outer edges of the first cover plate 1 and the second cover plate 2.

[0055] The electrical box body 3 is an L-shaped structure. The first plate 31 is located between the first cover plate 1 and the second cover plate 2 and can extend along the first direction z. The first plate 31 is used for installing a circuit board. The circuit board can be installed on the first plate 31 through a fixing plate 6 and is located in the cavity. The second plate 32 can be vertically connected to the end of the first plate 31 along the third direction y. The electrical box cover 4 is buckled on one side of the electrical box body 3 away from the second cover plate 2 to form a cavity. The fourth plate 42 can be vertically connected to one end of the third plate 41 close to the second cover plate 2 along the first direction z. The first folded edge 322 can be continuously provided on the inner side edge of the first groove 321.

[0056] In this embodiment, the electrical box body 3 is designed as an L-shaped structure, which can realize the miniaturization and dexterity of the overall structure of the electrical box. The part structure is simple, which is convenient for manufacturing and assembly.

[0057] Moreover, the first plate 31 is used for mounting the circuit board. Some auxiliary structures, such as the wire fixing member 7, need to be mounted on the second plate 32, and holes also need to be drilled. Since the area of the second plate 32 is smaller than that of the first plate 31, the instantaneous impact load during drilling is relatively large, and due to the small area, the load distribution is more concentrated. By providing a first groove 321 at the free end of the second plate 32 and a first folded edge 322 on the inner edge of the first groove 321, compared with the overall rectangular plate, the anti-deformation ability of the second plate 32 can be greatly improved, thereby enhancing the overall structural strength of the electrical box, preventing bending during drilling, and having less deformation when affected by assembly, vibration, or dropping. While meeting the expected functions of the electrical box, the manufacturing cost can be reduced and the production efficiency can be improved.

[0058] In some embodiments, the air return frame assembly further includes a wire fixing member 7, which is mounted on the inner side of the second plate 32 through a fastener 8 and is used for limiting the wires led out from the circuit board.

[0059] Specifically, the wire fixing member 7 can be mounted on the second plate 32 through a fixing member. When installing, holes need to be drilled on the second plate 32. Mounting holes 412 can be provided on the third plate 41 of the electrical box cover 4, and a coil passing through hole 413 is installed in the mounting hole 412. The wire fixing member 7 can be arranged close to the coil passing through hole 413 so that the wire harness led out from the wire fixing member 7 can directly lead out from the coil passing through hole 413. As Figure 5 shown, a fixing plate 6 is mounted on the first plate 31, and the circuit board is mounted on the fixing plate 6.

[0060] By providing the first groove 321, it is convenient for the wires led out from the wire fixing member 7 to reach the coil passing through hole 413. For the electrical box cover 4, if the structural strength of the third plate 41 is to be improved, an eighth folded edge 411 is provided on the side of the third plate 41 close to the second plate 32 along the third direction y. The eighth folded edge 411 is located in the areas on both sides of the coil passing through hole 413, and the eighth folded edge 411 can block the gaps on both sides of the first groove 321 located on both sides of the coil passing through hole 413.

[0061] In some embodiments, as Figure 3 shown, the first groove 321 has a first side wall 321A, a second side wall 321B, and a third side wall 321C. The first ends of the first side wall 321A and the second side wall 321B are connected by the third side wall 321C to form a groove bottom, and an opening is formed between the second ends of the first side wall 321A and the second side wall 321B. The width of the first groove 321 at the opening is greater than the width of the groove bottom.

[0062] This kind of structure can avoid forming an acute angle between the groove bottom and the side wall of the first groove 321, can reduce stress concentration, and improve the strength of the electrical box body 3 as the main load-bearing component; moreover, compared with acute angles and right angles, obtuse angles are also convenient for forming the first folded edge 322 through bending of sheet metal parts.

[0063] Optionally, the width of the first groove 321 at the opening may also be equal to or less than the width of the groove bottom.

[0064] In some embodiments, the width of the first groove 321 gradually decreases from the opening to the groove bottom to form a trapezoidal groove. For example, the first groove 321 is an isosceles trapezoid. Such a structure can make the forces at both ends of the second plate 32 along the first direction z more balanced.

[0065] Optionally, the first groove 321 may also be rectangular or other quadrilaterals, or other polygons other than quadrilaterals, etc.; on this basis, in addition to planes, the first side wall 321A and the second side wall 321B of the first groove 321 may also form curved surfaces or bent surfaces, etc.

[0066] In some embodiments, the first hem 322 is bent toward the inner side of the second plate 32.

[0067] With this structure, the first hem 322 cannot be seen from the outside of the electrical box, which can improve the aesthetics of the electrical box; moreover, for the electrical box cover 4, if it is necessary to improve the structural strength of the third plate 41, when an eighth hem 411 is provided on the side of the third plate 41 close to the second plate 32 along the third direction y, the eighth hem 411 can be attached to the outside of the second plate 32 to prevent the first hem 322 from affecting the attachment of the eighth hem 411 to the second plate 32, and the structural strength of the electrical box and the entire return air frame can be improved.

[0068] In some embodiments, as Figure 3 shown, on the length segment of the groove bottom of the first groove 321, a first overlapping edge 323 is provided on the side of the first hem 322 away from the second plate 32, and the first overlapping edge 323 is stacked on the inner side of the first hem 322.

[0069] As Figure 5 shown, when installing the wire fixing member 7 through the fastener 8, it is necessary to drill holes in the second plate 32. By providing the first overlapping edge 323 on the length segment of the first hem 322 located at the groove bottom, deformation of the first hem 322 can be prevented when drilling holes in the second plate 32. By adopting the structure of the first hem 322 cooperating with the first overlapping edge 323 for the second plate 32, the strength of the electrical box body 3 can be better increased, thereby improving the strength of the entire return air frame assembly.

[0070] In some embodiments, as Figure 1 and Figure 3 shown, at both edges of the end of the second plate 32 away from the first plate 31 on both sides of the first groove 321, second hems 324 are provided, and the second hems 324 are transitionally connected to the first hems 322. For example, an arc transition can be adopted, and the second hems 324 are located inside the third plate 41 and are used to connect to the third plate 41.

[0071] Specifically, the second folded edge 324 can be perpendicular to the second plate 32, and a first hole 325 can be set on the second folded edge 324 on both sides of the first groove 321. When the electrical box cover 4 and the electrical box body 3 are buckled together, the second folded edge 324 can abut against the inner surface of the third plate 41 and be connected by fasteners passing through the first hole 325.

[0072] This embodiment can improve the connection strength between the electrical box cover 4 and the electrical box body 3, and the second folded edge 324 is transitionally connected to the first folded edge 322, which can improve the strength of the second plate 32 and prevent the second plate 32 from deforming, thereby improving the structural strength of the entire return air frame assembly.

[0073] In some embodiments, the bending width of the first folded edge 322 relative to the second plate 32 is smaller than the folded width of the second folded edge 324 relative to the second plate 32. Setting the second folded edge 324 to a larger width can facilitate connection with fasteners, and setting the first folded edge 322 to a smaller width can be bent to form the first folded edge 323 without increasing the width of the first folded edge 322 during manufacturing.

[0074] In some embodiments, Figure 1 and Figure 3 As shown, the two side edges of the second plate 32 adjacent to the first plate 31 are respectively provided with a third folded edge 326 and a fourth folded edge 327 . The third folded edge 326 is arranged at an angle to the second plate 32 and abuts against the first cover plate 1 , and the fourth folded edge 327 is arranged at an angle to the second plate 32 and abuts against the second cover plate 2 .

[0075] Specifically, the third folded edge 326 is perpendicular to the second plate 32 so that the third folded edge 326 abuts against the first cover plate 1 through a plane; the fourth folded edge 327 is perpendicular to the second plate 32 so that the fourth folded edge 327 abuts against the fourth plate 42 through a plane.

[0076] This embodiment enables the electrical box body 3 to abut against the first cover plate 1 and the electrical box cover 4, thereby making the structure and installation of the entire electrical box more stable and less prone to deformation.

[0077] In some embodiments, Figures 1 to 3 The return air frame assembly further includes a bracket 5, the bracket 5 includes a first mounting plate 51 and a second mounting plate 52 connected at an angle, the first mounting plate 51 is welded to a region of the first plate 31 away from the second plate 32 and extends along a first direction z, and the second mounting plate 52 extends in a direction away from the second plate 32;

[0078] The first cover plate 1 includes a first main body plate 11 and a first flange 12. The first flange 12 is at least provided at one end of the first main body plate 11 close to the second plate 32 along the third direction y. The first flange 12 is located outside the second mounting plate 52 and connected to one end of the second mounting plate 52.

[0079] The second cover plate 2 includes a second main body plate 21 and a second flanging 22. The second flanging 22 is at least provided at one end of the first main body plate 11 close to the second plate 32 along the third direction y. The second flanging 22 is located outside the second mounting plate 52 and is connected to the other end of the second mounting plate 52.

[0080] Specifically, the first mounting plate 51 and the second mounting plate 52 can be perpendicular to form an L-shaped bracket 5. The extension length of the bracket 5 along the first direction z can cover the entire height of the first plate 31, and the outer side surface of the second mounting plate 52 can be flush with the outer side surface of the second plate 32. A second hole 521 can be provided at one end of the second mounting plate 52, and a third hole 121 can be provided on the first flanging 12, so that a fastener passes through the third hole 121 and the second hole 521 to connect the second mounting plate 52 and the first flanging 12; a second hole 521 can be provided at the other end of the second mounting plate 52, and a fourth hole 221 can be provided on the second flanging 22, so that a fastener passes through the fourth hole 221 and the second hole 521 to connect the second mounting plate 52 and the second flanging 22 through the fastener.

[0081] In this embodiment, the bracket 5 is welded to the electrical box body 3, which can reduce the structural difficulty of the electrical box body 3, facilitate processing, and the welding method can effectively ensure the connection strength between the bracket 5 and the electrical box body 3, and reduce the torsional deformation caused by the vibration or drop of the whole machine. For example, the first mounting plate 51 and the first plate 31 can adopt spot welding, which can reduce solder, improve production efficiency and reduce costs.

[0082] In some embodiments, such as Figure 1 and Figure 4 , a profiling part 13 is provided on the first cover plate 1. The profiling part 13 protrudes towards the inner side of the first cover plate 1 as a whole, and a second groove 311 for accommodating the profiling part 13 is provided on the first side of the first plate 31 close to the first cover plate 1.

[0083] Specifically, the profiling part 13 can extend along the second direction x, and a plurality of profiling parts 13 can be arranged at intervals along the third direction y on the first cover plate 1, which can increase the structural strength of the first cover plate 1 and prevent deformation. The second groove 311 can also be set as a trapezoidal groove, and the width at the opening is greater than the width of the groove bottom to reduce the stress at both sides of the groove bottom.

[0084] In this embodiment, by providing the second groove 311 on the first plate 31, the profiling part 13 can be avoided, and on the basis of improving the strength of the first cover plate 1, it does not affect the installation of the electrical box body 3.

[0085] In some embodiments, a third groove 312 for passing a wire is provided on the first side of the first plate 31 close to the first cover plate 1. A fifth folded edge 313 is provided in the area of the first side outside the third groove 312. The fifth folded edge 313 forms an angle with the first plate 31 and extends in a direction away from the second plate 32.

[0086] Specifically, the third groove 312 can also be set as a trapezoidal groove, and the width at the opening is greater than the width at the bottom of the groove to reduce the stress at both sides of the bottom of the groove. The third groove 312 is used to lead the wire of the internal components of the return air frame assembly to the circuit board. As Figure 5 shown, a groove is also provided at the position of the fixing plate 6 corresponding to the third groove 312 to facilitate wire leading.

[0087] This embodiment can conveniently lead the wire through the third groove 312. Moreover, considering that the second groove 311 and the third groove 312 are provided on the first side, by providing the fifth folded edge 313 in the area outside the third groove 312, the structural strength at the first side can be increased. Moreover, the entire inner edge of the second groove 311 is provided with the fifth folded edge 313, which can form a planar contact with the pressing part 13 to improve the installation stability of the electrical box body 3.

[0088] In some embodiments, as Figure 3 shown, a protrusion 314 is provided at the position of the bottom of the third groove 312 on the fifth folded edge 313. The protrusion 314 extends toward the outside of the fifth folded edge 313 and is used to selectively fix to the first cover plate 1.

[0089] Specifically, the surface of the protrusion 314 and the fifth folded edge 313 facing the first cover plate 1 are flush. A fifth hole 314' can be provided on the protrusion 314 to connect the protrusion 314 and the first cover plate 1 through a fastener.

[0090] This embodiment can further increase the connection strength between the electrical box body 3 and the first cover plate 1 and improve the structural stability of the entire return air frame assembly.

[0091] In some embodiments, a second overlapping edge 315 is provided on the inner side wall of the third groove 312. The second overlapping edge 315 is stacked on the side of the first plate 31 away from the electrical box cover 4.

[0092] This embodiment can eliminate the sharp edge of the third groove 312 by providing the second overlapping edge 315, prevent the problem of wire cutting damage to the wire when wiring here, and improve the working reliability of the device.

[0093] In some embodiments, as Figure 3As shown, a wire routing hole 318 is provided on the first plate 31 for guiding the wires of the fan in the return air frame assembly to the circuit board. A third folded edge 318' is provided at the edge of the wire routing hole 318, and the third folded edge 318' is stacked on the side of the first plate 31 away from the electrical box cover 4.

[0094] Since the wires of the fan are relatively thick, if the wire routing path is from the third groove 312, the distance is relatively long. Therefore, a wire routing hole 318 is opened at a position on the first plate 31 close to the second plate 32, which can directly lead out the wires of the fan with a shorter path, reduce the bending of the fan wires, shorten the wire length, and facilitate wire routing.

[0095] In some embodiments, as Figure 3 and Figure 4 shown, a fourth groove 316 is provided on the second side edge of the first plate 31 close to the second cover plate 2 for guiding the wires of the ambient temperature sensor to the circuit board. Sixth folded edges 317 are provided on both parts of the second side edge on both sides of the fourth groove 316. The sixth folded edges 317 form an angle with the first plate 31 and extend in a direction away from the second plate 32.

[0096] Specifically, the sixth folded edge 317 can be perpendicular to the first plate 31. For example, the fourth groove 316 can be a rectangular groove.

[0097] By providing the fourth groove 316 on the second side edge, the strength of the second side edge will be weakened. By providing the sixth folded edge 317, the influence of the fourth groove 316 can be reduced, and the structural strength of the electrical box body 3 can be ensured.

[0098] In some embodiments, as Figure 3 shown, the fourth groove 316 has a first edge 316A, a second edge 316B, and a third edge 316C. The first edge 316A and the second edge 316B are oppositely arranged, and the first ends of the first edge 316A and the second edge 316B are connected by the third edge 316C. An opening is formed between the second ends. Seventh folded edges 319 are provided on the first edge 316A, the second edge 316B, and the third edge 316C. The seventh folded edges 319 form an angle with the first plate 31 and extend in a direction away from the second plate 32.

[0099] Specifically, the seventh folded edge 319 is perpendicular to the first plate 31, and the bending height of the seventh folded edge 319 can be less than the bending height of the sixth folded edge.

[0100] In this embodiment, by providing the seventh folded edge 319, the sharp edges of the fourth groove 316 can be eliminated to prevent scratching the fixing plate 6.

[0101] In some embodiments, the seventh folded edges corresponding to the first edge 316A, the second edge 316B, and the third edge 316C are independent of each other.

[0102] Since the sixth hemming edges 317 on both sides of the fourth groove 316 are relatively large and the edge strength is thus ensured, the seventh hemming edges 319 are independently arranged on each side at the fourth groove 316, and the adjacent seventh hemming edges 319 are not connected, which can reduce the mold manufacturing cost and also save the material cost.

[0103] In some embodiments, the seventh hemming edge 319 is trapezoidal, and the width of the top of the seventh hemming edge 319 is smaller than the width of the root. The seventh hemming edge 319 with such a structure is convenient for bending and can also reduce the damage to the fixing plate 6 caused by the corner position of the free end of the seventh hemming edge 319.

[0104] The electric appliance box of the present disclosure greatly enhances the box body strength with features such as hemming edges and overlapping edges. Meanwhile, on the premise of ensuring the expected functions of the electric appliance box, the manufacturing cost is reduced and the production efficiency is improved. The overall electric appliance box can adopt a steel plate with a thickness of 0.6 mm. Compared with the commonly used 0.8 mm and 0.95 mm for electric appliance boxes, the material volume is reduced by 25% and 37% respectively, greatly reducing the material cost. At the same time, the thinner material also has greater advantages in production links such as mold making, and the production efficiency and the qualified rate of finished products also become higher.

[0105] Secondly, the present disclosure provides an air conditioning device, including the air return frame assembly of the above embodiments. Since the air return frame assembly of the present disclosure has relatively excellent overall structural strength and is less deformed when affected by assembly, vibration or dropping, the use reliability of the air conditioning device can be improved.

[0106] In some embodiments, the air conditioning device includes an air duct machine or a ceiling-mounted machine.

[0107] The above are only exemplary embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A return air frame assembly, characterized in that, Comprising: A first cover plate (1); A second cover plate (2), which is oppositely arranged along a first direction (z) relative to the first cover plate (1); An electrical box body (3), including a first plate (31) and a second plate (32). The first plate (31) is located between the first cover plate (1) and the second cover plate (2), and the first plate (31) is located at an end of the second cover plate (2) along a second direction (x) for mounting a circuit board. The second plate (32) is angularly connected to an end of the first plate (31) along a third direction (y). The second direction (x) is perpendicular to the first direction (z), and the third direction (y) is perpendicular to the first direction (z) and the second direction (x); and An electrical box cover (4), which is buckled on a side of the electrical box body (3) away from the second cover plate (2) to form a cavity. The electrical box cover (4) includes a third plate (41) and a fourth plate (42). The third plate (41) is oppositely arranged along the second direction (x) relative to the first plate (31), and the fourth plate (42) is angularly connected to an end of the third plate (41) along the first direction (z) close to the second cover plate (2); Wherein, the second plate (32) extends towards a direction away from the second cover plate (2) and abuts against the third plate (41). A first groove (321) is provided at an end of the second plate (32) away from the first plate (31). A first folded edge (322) is provided on a side edge of the first groove (321). The first folded edge (322) is arranged at an angle with the second plate (32). The fourth plate (42) extends towards the second cover plate (2) and abuts against an end of the second cover plate (2). Along the second direction (x), the length of the first cover plate (1) is greater than the length of the second cover plate (2). Along the third direction (y), the width of the first cover plate (1) is greater than the width of the second cover plate (2).

2. The return air frame assembly according to claim 1, wherein, It further includes a wire fixing member (7), which is installed on the inner side of the second plate (32) through a fastener (8) for limiting the wires led out from the circuit board.

3. The return air frame assembly according to claim 1, characterized in that The first groove (321) has a first side wall (321A), a second side wall (321B) and a third side wall (321C). The first ends of the first side wall (321A) and the second side wall (321B) are connected by the third side wall (321C) to form a bottom of the groove. An opening is formed between the second ends of the first side wall (321A) and the second side wall (321B). The width of the first groove (321) at the opening is greater than the width of the bottom of the groove.

4. The return air frame assembly according to claim 1, wherein, The width of the first groove (321) gradually decreases from the opening to the bottom of the groove to form a trapezoidal groove.

5. The return air frame assembly according to claim 1, characterized in that The first folded edge (322) is bent towards the inner side of the second plate (32).

6. The return air frame assembly according to claim 1, wherein, At a length section of the bottom of the first groove (321), a first overlapping edge (323) is provided on a side of the first folded edge (322) away from the second plate (32). The first overlapping edge (323) is stacked on the inner side of the first folded edge (322).

7. The return air frame assembly according to claim 1, characterized in that, One end of the second plate (32) away from the first plate (31) is provided with second flanges (324) at both edges on both sides of the first groove (321). The second flanges (324) are located inside the third plate (41) and are used for transitional connection with the third plate (41).

8. The return air frame assembly according to claim 7, characterized in that, The bending width of the first flange (322) relative to the second plate (32) is smaller than the folding-back width of the second flange (324) relative to the second plate (32).

9. The return air frame assembly according to any one of claims 1 to 8, characterized in that, Two adjacent sides of the second plate (32) adjacent to the first plate (31) are respectively provided with a third flange (326) and a fourth flange (327). The third flange (326) is arranged at an angle with the second plate (32) and abuts against the first cover plate (1), and the fourth flange (327) is arranged at an angle with the second plate (32) and abuts against the second cover plate (2).

10. The return air frame assembly according to any one of claims 1 to 8, characterized in that, It further includes a bracket (5). The bracket (5) includes a first mounting plate (51) and a second mounting plate (52) connected at an angle. The first mounting plate (51) is welded to the area of the first plate (31) facing away from the second plate (32) and extends along the first direction (z), and the second mounting plate (52) extends in a direction away from the second plate (32). The first cover plate (1) includes a first main body plate (11) and a first flange (12). The first flange (12) is at least provided at one end of the first main body plate (11) along the third direction (y) close to the second plate (32). The first flange (12) is located outside the second mounting plate (52) and is connected to one end of the second mounting plate (52). The second cover plate (2) includes a second main body plate (21) and a second flange (22). The second flange (22) is at least provided at one end of the first main body plate (11) along the third direction (y) close to the second plate (32). The second flange (22) is located outside the second mounting plate (52) and is connected to the other end of the second mounting plate (52).

11. The return air frame assembly according to any one of claims 1 to 8, characterized in that, A profiling part (13) is provided on the first cover plate (1). The profiling part (13) protrudes integrally towards the inside of the first cover plate (1). A second groove (311) for accommodating the profiling part (13) is provided on the first side of the first plate (31) close to the first cover plate (1).

12. The return air frame assembly according to claim 11, characterized in that, A third groove (312) for passing a wire is provided on the first side of the first plate (31) close to the first cover plate (1). A fifth flange (313) is provided in the area of the first side outside the third groove (312). The fifth flange (313) is at an angle with the first plate (31) and extends in a direction away from the second plate (32).

13. The return air frame assembly according to claim 12, characterized in that, A protrusion (314) is provided at the position of the bottom of the third groove (312) on the fifth flange (313). The protrusion (314) extends towards the outside of the fifth flange (313) and is used for selectively fixing to the first cover plate (1).

14. The return air frame assembly according to claim 12, characterized in that, The inner wall of the third groove (312) is provided with a second folded edge (315), and the second folded edge (315) is stacked on the side of the first plate (31) away from the electrical box cover (4).

15. The return air frame assembly according to any one of claims 1 to 8, characterized in that The first plate (31) is provided with a wire passing hole (318) for guiding the wires of the fan in the return air frame assembly to the circuit board. A third folded edge (318') is provided at the edge of the wire passing hole (318), and the third folded edge (318') is stacked on the side of the first plate (31) away from the electrical box cover (4).

16. The return air frame assembly according to any one of claims 1 to 8, characterized in that A fourth groove (316) is provided at the second side edge of the first plate (31) close to the second cover plate (2) for guiding the wires of the ambient temperature sensor to the circuit board. Sixth folded edges (317) are provided at both parts of the second side edge located on both sides of the fourth groove (316). The sixth folded edge (317) forms an angle with the first plate (31) and extends in a direction away from the second plate (32).

17. The return air frame assembly according to claim 16, wherein The fourth groove (316) has a first edge (316A), a second edge (316B) and a third edge (316C). The first edge (316A) and the second edge (316B) are oppositely arranged, and the first ends of the first edge (316A) and the second edge (316B) are connected by the third edge (316C), and an opening is formed between the second ends. Seventh folded edges (319) are provided on the first edge (316A), the second edge (316B) and the third edge (316C). The seventh folded edge (319) forms an angle with the first plate (31) and extends in a direction away from the second plate (32).

18. The return air frame assembly according to claim 17, wherein, The seventh folded edges (319) corresponding to the first edge (316A), the second edge (316B) and the third edge (316C) are independent of each other.

19. The return air frame assembly according to claim 17, wherein, The seventh folded edge (319) is trapezoidal, and the width of the top of the seventh folded edge (319) is smaller than the width of the root.

20. An air conditioning device, characterized in that, It includes the return air frame assembly according to any one of claims 1 to 19.

21. The air-conditioning equipment according to claim 20, characterized in that, The air conditioning equipment includes an air duct machine or a ceiling-mounted machine.

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