CN221036132U - Return air frame assembly and air conditioning equipment - Google Patents

Abstract

The present disclosure relates to a return air frame assembly and air conditioning equipment, the return air frame assembly includes: the first cover plate and the second cover plate are oppositely arranged along the first direction; the electrical box body comprises a first plate and a second plate, wherein the first plate is positioned between the first cover plate and the second cover plate, and the first plate is positioned at the end part of the second cover plate along the second direction and is used for installing a circuit board; the second plate is angularly connected to an end of the first plate in a third direction; the electric appliance box cover is buckled on one side of the electric appliance box body far away from the second cover plate and forms a cavity, the electric appliance box comprises a third plate and a fourth plate, the third plate and the first plate are oppositely arranged along the second direction, and the fourth plate is connected with one end of the third plate, which is close to the second cover plate along the first direction, at an angle; the second board extends towards the direction of keeping away from the second apron and the butt is in the third board, and the one end that the second board kept away from first board is equipped with first recess, and its side is equipped with first hem, and first hem and second board set up at an angle, and the fourth board extends towards the second apron and the butt is in the tip of second apron.

Description

Return air frame assembly and air conditioning equipment

Technical Field

The disclosure relates to the technical field of air conditioning equipment, and in particular relates to a return air frame assembly and air conditioning equipment.

Background

The air duct machine is a short name of a hidden air conditioner and can also be called an air conditioner air duct machine or an air duct machine air conditioner. The air conditioner of the air pipe machine has low cost, convenient maintenance, suitability for the use habit of the air conditioner of the national people and wide application.

The prior art wind pipe machine electrical box is mainly divided into a hanging type installation mode and a hidden type installation mode. The hanging type electric appliance box mainly takes a pentahedron square box structure as a main body, a flat-plate electric appliance box cover is matched and installed, controller parts such as a main board and the like are placed in the main body, a support leg is added at the rear part to fix the main body on the side edge of an air duct machine by using a screw, the structure is simple, but the box body is independent of the outside of a shell, and the aesthetic feeling is not enough.

The main body part of the hidden electric appliance box is not five, but three or two, the vacant part surface is provided by the electric appliance box cover, the side plates or the upper cover plate and the lower cover plate, and the box body participates in the composition of the whole shell, so that the appearance of the whole electric appliance box is small and flexible, and the electric appliance box is regular and attractive and gradually becomes an industry trend. However, the box body is lack of multi-surface support compared with a hanging type, and is not enough in strength, however, the box body is directly involved in the composition of the shell, so that the box body is greatly influenced by the conditions of assembly, vibration, falling and the like, and the structural strength of the electric box is difficult to ensure.

Disclosure of utility model

The utility model provides a return air frame subassembly and air conditioning equipment can improve the structural strength of electrical apparatus box.

The first aspect of the present disclosure provides a return air frame assembly comprising:

A first cover plate;

The second cover plate is arranged opposite to the first cover plate along the first direction;

The electric appliance box body, the return air frame assembly comprises a first plate and a second plate, the first plate is positioned between the first cover plate and the second cover plate, and the first plate is positioned at the end part of the second cover plate along the second direction and is used for installing the circuit board; the second plate is connected to the end of the first plate along a third direction at an angle, the second direction is perpendicular to the first direction, and the third direction is perpendicular to the first direction and the second direction; and

The electric appliance box cover is buckled on one side, far away from the second cover plate, of the electric appliance box body and forms a cavity, the electric appliance box cover comprises a third plate and a fourth plate, the third plate and the first plate are oppositely arranged along the second direction, and the fourth plate is connected with one end, close to the second cover plate, of the third plate along the first direction in an angle manner;

Wherein, the second board extends and the butt in the third board towards the direction of keeping away from the second apron, and the one end that the first board was kept away from to the second board is equipped with first recess, and the side of first recess is equipped with first hem, and first hem and second board angle setting, fourth board extend and the butt in the tip of second apron towards the second apron.

In some embodiments, the return air frame assembly further includes a wire retention member mounted to the inside of the second panel by fasteners for retaining wires drawn from the circuit board.

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, and a width of the first groove at the opening is larger than a width of the groove bottom.

In some embodiments, the first groove tapers in width from the opening to the groove bottom to form a trapezoidal groove.

In some embodiments, the first fold is folded toward the inside of the second panel.

In some embodiments, a first fold is provided on a side of the first flange remote from the second plate at a length of a bottom of the first recess, the first fold being disposed in a stack on an inner side of the first fold.

In some embodiments, the end of the second plate remote from the first plate is provided with second flanges at edges on both sides of the first groove, the second flanges being located inside the third plate and being adapted to be in transitional connection with the third plate.

In some embodiments, the fold width of the first fold relative to the second panel is less than the fold width of the second fold relative to the second panel.

In some embodiments, two sides of the second plate adjacent to the first plate are respectively provided with a third folded edge and a fourth folded edge, the third folded edge is arranged at an angle with the second plate and is abutted with the first cover plate, and the fourth folded edge is arranged at an angle with the second plate and is abutted with the second cover plate.

In some embodiments, the bracket further comprises a bracket comprising a first mounting plate and a second mounting plate connected at an angle, the first mounting plate welded to an area of the first plate facing away from the second plate and extending in a first direction, the second mounting plate extending in a direction away from the second plate;

The first cover plate comprises a first main body plate and a first flanging, the first flanging is at least arranged at one end of the first main body plate, which is close to the second plate, along a third direction, and the first flanging is positioned at the outer side of the second mounting plate and connected with one end of the second mounting plate;

The second apron includes second main part board and second turn-ups, and the second turn-ups is established at least and is close to the one end of second board along the third direction at first main part board, and the second turn-ups is located the second mounting panel outside, and is connected with the other end of second mounting panel.

In some embodiments, the first cover plate is provided with a profiling part, the profiling part integrally protrudes towards the inner side of the first cover plate, and the first plate is provided with a second groove for accommodating the profiling part close to the first side edge of the first cover plate.

In some embodiments, the first plate is provided with a third groove for passing the wire near a first side of the first cover plate, the first side is provided with fifth folds in regions other than the third groove, and the fifth folds are angled to the first plate and extend in a direction away from the second plate.

In some embodiments, a protrusion is provided on the fifth flange at a position at a bottom of the third groove, the protrusion extending toward an outer side of the fifth flange for being selectively fixed with the first cover plate.

In some embodiments, the inner side wall of the third groove is provided with a second overlapping edge, and the second overlapping edge is overlapped on one side of the first plate far away from the electric box cover.

In some embodiments, a wiring hole is formed in the first board and is used for guiding a wire of the fan in the air return frame assembly to the circuit board, a third stacking edge is formed at the edge of the wiring hole, and the third stacking edge is arranged on one side, away from the box cover, of the first board in a stacked mode.

In some embodiments, the first plate is provided with a fourth groove near the second side of the second cover plate for guiding the wires of the ambient temperature sensor to the circuit board, and the portions of the second side on both sides of the fourth groove are provided with sixth folds which are angled with respect to the first plate and extend in a direction away from the second plate.

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 disposed opposite each other, and the first ends of the first edge and the second edge are connected by the third edge, an opening is formed between the second ends of the first edge and the second edge, and the first edge, the second edge, and the third edge are each provided with a seventh hem that is angled from the first plate and extends in a direction away from the second plate.

In some embodiments, the seventh folds corresponding to the first edge, the second edge, and the third edge are independent of each other.

In some embodiments, the seventh fold is trapezoidal and the width of the top of the seventh fold is less than the width of the root.

A second aspect of the present disclosure provides an air conditioning apparatus comprising the return air frame assembly of the above embodiments.

In some embodiments, the air conditioning apparatus includes an air duct or a ceiling.

The return air frame assembly of the embodiment of the disclosure designs the electric box body into an L-shaped structure, can realize miniaturization and dexterity of the whole structure of the electric box, has simple part structure and is convenient to manufacture and assemble. And, first board is used for installing electrical components, when installing electrical components, need install some auxiliary structure on the second board, for example solid line spare etc. still need punch, through set up first recess at the free end of second board to be equipped with first hem at the inboard reason of first recess, can greatly improve the anti deformability of second board, thereby improve the overall structure intensity of battery case, deformation is less when receiving the influence of assembly, vibration or falling, when satisfying electrical box intended function, reduce manufacturing cost, improvement production efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present disclosure, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is an exploded view of some embodiments of the return air frame assembly of the present disclosure.

Fig. 2 is a schematic structural view of some embodiments of the return air frame assembly of the present disclosure.

Fig. 3 is a first angular schematic view of some embodiments of an electrical box in a return air frame assembly of the present disclosure.

Fig. 4 is a second angular schematic view of some embodiments of an electrical box in a return air frame assembly of the present disclosure.

Fig. 5 is a first angle schematic view of the mounting plate on the electrical box.

Fig. 6 is a second angular schematic view of the mounting of the fixing plate on the electrical box.

Detailed Description

The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without carrying out the inventive task are within the scope of protection of this disclosure.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.

In the description of the present disclosure, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present disclosure and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present disclosure.

In the description of the present disclosure, it should be understood that the use of terms such as "first," "second," etc. for defining components is merely for convenience in distinguishing corresponding components, and the terms are not meant to be construed as limiting the scope of the present disclosure unless otherwise indicated.

As shown in fig. 1-6, the present disclosure provides a return air frame assembly, in some embodiments, comprising:

A first cover plate 1;

the second cover plate 2 is arranged opposite to the first cover plate 1 along the first direction z;

The electrical box 3 comprises a first plate 31 and a second plate 32, wherein the first plate 31 is positioned between the first cover plate 1 and the second cover plate 2, the first plate 31 is positioned at the end part of the second cover plate 2 along a second direction x, the first plate 31 is used for installing a circuit board, the second plate 32 is connected to the end part of the first plate 31 along a third direction y at an angle, 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

The electric appliance box cover 4 is buckled on one side of the electric appliance box body 3, which is far away from the second cover plate 2, and forms a cavity, the electric appliance box cover 4 comprises a third plate 41 and a fourth plate 42, the third plate 41 and the first plate 31 are oppositely arranged along the second direction x, and the fourth plate 42 is connected with one end, close to the second cover plate 2, of the third plate 41 along the first direction z at an angle;

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 disposed at one end of the second plate 32 away from the first plate 31, a first folding edge 322 is disposed at a side edge of the first groove 321, and the first folding edge 322 is disposed at an angle with the second plate 32, and a fourth plate is disposed.

For example, in the installed state, the first cover plate 1 is an upper cover plate, and the second cover plate 2 is a return air cover plate. The first cover plate 1 and the second cover plate 2 may each have a rectangular plate-like structure.

Along the second direction x, the length of the first cover plate 1 is greater than the length of the second cover plate 2, the first cover plate 1 is aligned with one end of the second cover plate 2, the other end of the first cover plate 1 exceeds the second cover plate 2, the electric box occupies the length area of the first cover plate 1 exceeding the second cover plate 2, and the first cover plate 1 forms one surface of the electric box.

Along the third direction y, the width of the first cover plate 1 is greater than the width of the second cover plate 2, the first cover plate 1 is aligned with one side of the second cover plate 2, the other side of the first cover plate 1 exceeds the second cover plate 2, the electrical box is positioned on one side of the first cover plate 1 aligned with the second cover plate 2, and the second plate 32 is positioned on the first plate 31 close to the outer edges of the first cover plate 1 and the second cover plate 2.

The electrical apparatus box body 3 is L-shaped structure, and first board 31 is located between first apron 1 and the second apron 2, can extend along first direction z, and first board 31 is used for installing the circuit board, and circuit board accessible fixed plate 6 is installed on first board 31 and is located the cavity. The second plate 32 may be perpendicularly connected to an end of the first plate 31 in 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 and forms a cavity, and the fourth plate 42 can be vertically connected to one end, close to the second cover plate 2, of the third plate 41 along the first direction z. The first flange 322 may be continuously disposed at an inner side edge of the first groove 321.

In the embodiment, the electric box body 3 is designed into an L-shaped structure, so that the miniaturization and the dexterity of the whole structure of the electric box can be realized, the part structure is simple, and the manufacturing and the assembly are convenient.

Moreover, the first plate 31 is used for installing a circuit board, and some auxiliary structures such as the wire fixing member 7 and the like are required to be installed on the second plate 32, and punching is also required, because the area of the second plate 32 is smaller than that of the first plate 31, the instantaneous impact load received during punching is larger, and the load distribution is more concentrated due to the small area, by arranging the first groove 321 at the free end of the second plate 32 and arranging the first folding edge 322 at the inner side edge of the first groove 321, compared with the integral rectangular plate, the deformation resistance of the second plate 32 can be greatly improved, thereby improving the integral structural strength of the electric box, preventing bending during punching, reducing the manufacturing cost and improving the production efficiency while meeting the expected function of the electric box.

In some embodiments, the return air frame assembly further includes a wire retention member 7 mounted to the inside of the second plate 32 by fasteners 8 for retaining wires drawn from the circuit board.

Specifically, the wire fixing member 7 may be mounted to the second plate 32 by a fixing member, and it is necessary to punch holes in the second plate 32 when mounting. The third plate 41 of the electric box cover 4 may be provided with a mounting hole 412, the coil 413 is mounted in the mounting hole 412, and the wire fixing member 7 may be disposed near the coil 413, so that the wire harness led out from the wire fixing member 7 may be led out directly from the coil 413. As shown in fig. 5, the first board 31 is mounted with a fixing board 6, and the fixing board 6 is mounted with a circuit board.

By providing the first groove 321, it is convenient to make the wire led out from the wire fixing member 7 reach the through-coil 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 disposed on one side of the third plate 41, which is close to the second plate 32 along the third direction y, where the eighth folded edge 411 is located at the two sides of the over-coil 413, and the eighth folded edge 411 can cover the gap where the first groove 321 is located at the two sides of the over-coil 413.

In some embodiments, as shown in fig. 3, the first groove 321 has a first sidewall 321A, a second sidewall 321B, and a third sidewall 321C, first ends of the first sidewall 321A and the second sidewall 321B are connected by the third sidewall 321C to form a groove bottom, an opening is formed between second ends of the first sidewall 321A and the second sidewall 321B, and a width of the first groove 321 at the opening is greater than a width of the groove bottom.

The structure can avoid forming an acute angle between the bottom and the side wall of the first groove 321, reduce stress concentration and improve the strength of the electrical box body 3 serving as a main bearing part; moreover, the obtuse angle also facilitates bending by the sheet metal piece to form the first fold 322, as compared to acute and right angles.

Alternatively, the width of the first groove 321 at the opening may be equal to or smaller than the width of the groove bottom.

In some embodiments, the first groove 321 tapers in width from the opening to the bottom of the groove to form a trapezoidal groove. For example, the first groove 321 has an isosceles trapezoid shape. This configuration allows the second plate 32 to be more evenly stressed across the first direction z.

Alternatively, the first groove 321 may be rectangular or other quadrangles, or other polygons other than quadrangles, etc.; on this basis, the first side wall 321A and the second side wall 321B of the first groove 321 may be curved or bent, in addition to planar surfaces.

In some embodiments, the first flap 322 is folded toward the inside of the second panel 32.

The first folded edge 322 can not be seen from the outside of the electric appliance box, so that the aesthetic property of the electric appliance box can be improved; in addition, for the electrical box cover 4, if the structural strength of the third plate 41 is to be improved, in the case that the eighth folded edge 411 is disposed on the side of the third plate 41 close to the second plate 32 along the third direction y, the eighth folded edge 411 can be attached to the outer side of the second plate 32, so that the first folded edge 322 is prevented from affecting the attachment of the eighth folded edge 411 to the second plate 32, and the structural strength of the electrical box and the whole air return frame can be improved.

In some embodiments, as shown in fig. 3, a first folded edge 323 is provided at a side of the first folded edge 322 away from the second plate 32 at a length of a groove bottom of the first groove 321, and the first folded edge 323 is disposed inside the first folded edge 322 in a stacked manner.

As shown in fig. 5, when the fastener 7 is installed by the fastener 8, it is necessary to punch the second plate 32, and by providing the first folded edge 323 at a length of the first folded edge 322 at the bottom of the groove, deformation of the first folded edge 322 can be prevented when the second plate 32 is punched. The strength of the electrical box 3 can be better enhanced by adopting the structure that the first folded edge 322 is matched with the first folded edge 323 for the second plate 32, so that the strength of the whole return air frame assembly is enhanced.

In some embodiments, as shown in fig. 1 and 3, an end of the second plate 32 away from the first plate 31 is provided with a second flange 324 at edges on both sides of the first groove 321, where the second flange 324 is in transition with the first flange 322, for example, an arc transition may be adopted, and the second flange 324 is located inside the third plate 41 and is used for connection with the third plate 41.

Specifically, the second flange 324 may be perpendicular to the second plate 32, and the second flanges 324 on two sides of the first groove 321 may be provided with a first hole 325, and when the electrical box cover 4 is fastened with the electrical box body 3, the second flange 324 may abut against the inner surface of the third plate 41 and pass through the first hole 325 through a fastener for connection.

This embodiment can improve the joint strength of electrical apparatus lid 4 and electrical apparatus box body 3, and second folded edge 324 and first folded edge 322 transitional coupling can improve the intensity of second board 32 moreover, prevents that second board 32 from taking place to warp to improve the structural strength of whole return air frame subassembly.

In some embodiments, the fold width of the first flap 322 relative to the second panel 32 is less than the fold width of the second flap 324 relative to the second panel 32. Setting the second flap 324 to a larger width facilitates connection by fasteners, and setting the first flap 322 to a smaller width enables bending to form the first flap 323 without increasing the width of the first flap 322 during manufacture.

In some embodiments, as shown in fig. 1 and 3, two sides 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 disposed at an angle to the second plate 32 and abuts the first cover plate 1, and the fourth folded edge 327 is disposed at an angle to the second plate 32 and abuts the second cover plate 2.

Specifically, the third flange 326 is perpendicular to the second plate 32, so that the third flange 326 abuts against the first cover plate 1 through a plane; the fourth flange 327 is perpendicular to the second plate 32 such that the fourth flange 327 is in planar abutment with the fourth plate 42.

This embodiment can make electric apparatus box body 3 and first apron 1 and electric apparatus lid 4 mutual butt to make the structure and the installation of whole electric apparatus box more stable, be difficult to take place to warp.

In some embodiments, as shown in fig. 1-3, the return air frame assembly further comprises a bracket 5, the bracket 5 comprising a first mounting plate 51 and a second mounting plate 52 connected at an angle, the first mounting plate 51 being welded to the first plate 31 in a region facing away from the second plate 32 and extending in a first direction z, the second mounting plate 52 extending in a direction away from the second plate 32;

The first cover plate 1 comprises a first main body plate 11 and a first flanging 12, the first flanging 12 is at least arranged at one end of the first main body plate 11, which is close to the second plate 32 along the third direction y, and the first flanging 12 is positioned at the outer side of the second mounting plate 52 and is connected with 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 near the second plate 32 along the third direction y, and the second flange 22 is located outside the second mounting plate 52 and connected to the other end of the second mounting plate 52.

Specifically, the first mounting plate 51 and the second mounting plate 52 may be perpendicular to form an L-shaped bracket 5, and an extension length of the bracket 5 in the first direction z may cover the entire height of the first plate 31, and an outer side surface of the second mounting plate 52 may be flush with an outer side surface of the second plate 32. A second hole 51 may be provided at one end of the second mounting plate 52, and a third hole 121 may be provided in the first flange 12 to pass through the third hole 121 and the second hole 51 by a fastener, thereby connecting the second mounting plate 52 with the first flange 12; the other end of the second mounting plate 52 may be provided with a second hole 51, and the second flange 22 may be provided with a fourth hole 221 to pass through the fourth hole 221 and the second hole 51 by a fastener, thereby connecting the second mounting plate 52 with the second flange 22 by the fastener.

According to the embodiment, the support 5 is welded on the electric box body 3, so that the structural difficulty of the electric box body 3 can be reduced, the electric box body 3 is convenient to process, the connection strength of the support 5 and the electric box body 3 can be effectively ensured in a welding mode, and the distortion caused by vibration or falling of the whole machine is reduced. For example, the first mounting plate 51 and the first plate 31 may be spot-welded, so that the welding flux can be reduced, the production efficiency can be improved, and the cost can be reduced.

In some embodiments, as shown in fig. 1 and 4, the first cover plate 1 is provided with a profiling portion 13, the profiling portion 13 protrudes toward the inner side of the first cover plate 1 as a whole, and the first plate 31 is provided with a second groove 311 for accommodating the profiling portion 13 near the first side edge of the first cover plate 1.

Specifically, the profiling portion 13 may extend along the second direction x, and a plurality of profiling portions 13 may be disposed on the first cover plate 1 at intervals along the third direction y, so that the structural strength of the first cover plate 1 may be increased, and deformation may be prevented. The second groove 311 may also be configured as a trapezoidal groove, and the width at the opening is greater than the width of the groove bottom, so as to reduce the stress at two sides of the groove bottom.

In this embodiment, the second groove 311 is formed in the first plate 31, so that the strength of the first cover plate 1 is improved, and the mounting of the electrical box 3 is not affected by the back-off profiled portion 13.

In some embodiments, the first plate 31 is provided with a third groove 312 for passing the wire near the first side of the first cover plate 1, and the first side is provided with a fifth folded edge 313 in a region other than the third groove 312, and the fifth folded edge 313 is angled to the first plate 31 and extends in a direction away from the second plate 32.

Specifically, the third groove 312 may also be configured 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. The third groove 312 is used for guiding the wires of the inner parts of the return air frame assembly to the circuit board, and as shown in fig. 5, a groove is also arranged at a position corresponding to the third groove 312 of the fixing plate 6, so as to facilitate the wire guiding.

This embodiment can conveniently realize the lead wire through the third groove 312, and considering that the second groove 311 and the third groove 312 are provided on the first side edge, by providing the fifth folded edge 313 in the area other than the third groove 312, the structural strength at the first side edge can be increased, and the whole inner edge of the second groove 311 is provided with the fifth folded edge 313 to form plane abutment with the profiling part 13, so that the installation stability of the electrical box 3 is improved.

In some embodiments, as shown in fig. 3, a protrusion 314 is provided on the fifth flange 313 at a position at the bottom of the third groove 312, and the protrusion 314 extends toward the outer side of the fifth flange 313, for being selectively fixed with the first cover plate 1.

Specifically, the protrusions 314 and the fifth folded edge 313 are flush toward the surface of the first cover plate 1, and fifth holes 314' may be provided in the protrusions 314 to connect the protrusions 314 with the first cover plate 1 by fasteners.

This embodiment can further increase the joint strength of electrical apparatus box body 3 and first apron 1, improves the structural stability of whole return air frame subassembly.

In some embodiments, the inner side wall of the third groove 312 is provided with a second stacking edge 315, and the second stacking edge 315 is stacked on the side of the first plate 31 away from the electrical box cover 4.

By arranging the second overlapping edge 315, the embodiment can eliminate the sharp edge of the third groove 312, prevent the problem that the cutting line damages the wires when the wires are routed, and improve the working reliability of the equipment.

In some embodiments, as shown in fig. 3, a wiring hole 318 is formed on the first plate 31 for guiding the wires of the fan in the air return frame assembly to the circuit board, and a third stacking edge 318 'is formed at the edge of the wiring hole 318, and the third stacking edge 318' is stacked on the side, away from the electrical box cover 4, of the first plate 31.

Because the wires of the fan are thicker, if the wire guiding path is far from the third groove 312, the wire guiding hole 318 is opened on the first plate 31 near the second plate 32, so that the wires of the fan can be directly led out in a short path, the bending of the wires of the fan can be reduced, the length of the wires is shortened, and the wires are convenient to be wired.

In some embodiments, as shown in fig. 3 and 4, the second side edge of the first plate 31 near the second cover plate 2 is provided with a fourth groove 316 for guiding the wires of the ambient temperature sensor to the circuit board, and the portions of the second side edge located at both sides of the fourth groove 316 are provided with sixth folded edges 317, and the sixth folded edges 317 are angled with respect to the first plate 31 and extend in a direction away from the second plate 32.

Specifically, sixth fold 317 may be perpendicular to first plate 31. For example, the fourth groove 316 may be a rectangular groove.

By arranging the fourth groove 316 on the second side edge, the strength of the second side edge can be weakened, and by arranging 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 is ensured.

In some embodiments, as shown in fig. 3, the fourth groove 316 has a first edge 316A, a second edge 316B, and a third edge 316C, where the first edge 316A and the second edge 316B are disposed opposite each other, and the first ends of the first edge 316A and the second edge 316B are connected by the third edge 316C, and the second ends of the first edge 316A, the second edge 316B, and the third edge 316C are each provided with a seventh folded edge 319, and the seventh folded edge 319 is angled with respect to the first plate 31 and extends in a direction away from the second plate 32.

Specifically, the seventh folded edge 319 is perpendicular to the first plate 31, and a folded height of the seventh folded edge 319 may be smaller than a folded height of the sixth folded edge 319.

This embodiment eliminates the sharp edge of the fourth recess 316 by providing the seventh folded edge 319, preventing scratch of the fixing plate 6.

In some embodiments, the seventh folds 319 corresponding to the first edge 316A, the second edge 316B, and the third edge 316C are independent of each other.

Because the sixth folded edges 317 on both sides of the fourth groove 316 are larger, the edge strength is guaranteed, and the seventh folded edges 319 are independently arranged on each side of the fourth groove 316, and the adjacent seventh folded edges 319 are not connected, so that the manufacturing cost of the die can be reduced, and meanwhile, the material cost is also saved.

In some embodiments, the seventh fold 319 is trapezoidal and the width of the top of the seventh fold 319 is less than the width of the root. The seventh folded edge 319 with the structure is convenient to bend, and the damage to the fixing plate 6 caused by the corner position of the free end of the seventh folded edge 319 can be reduced.

The electric appliance box has the advantages that the strength of the box body is greatly enhanced by the characteristics of folding edges, overlapping edges and the like, meanwhile, the manufacturing cost is reduced on the premise of ensuring the expected function of the electric appliance box, and the production efficiency is improved. The whole electric box can adopt a 0.6mm thick steel plate, compared with the common electric box with 0.8mm and 0.95mm, the volume of the material is reduced by 25 percent and 37 percent respectively, the material cost is greatly reduced, and simultaneously, thinner materials have greater advantages in the production links of die manufacture and the like, and the production efficiency and the finished product qualification rate are also increased.

Next, the present disclosure provides an air conditioning apparatus including the return air frame assembly of the above embodiment. Because the return air frame assembly has better overall structural strength, the deformation is smaller when the return air frame assembly is influenced by assembly, vibration or falling, and therefore the use reliability of the air conditioning equipment can be improved.

In some embodiments, the air conditioning apparatus includes an air duct or a ceiling.

The foregoing is illustrative of the present disclosure and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., which are within the spirit and principles of the present disclosure.

Claims (21)

1. A return air frame assembly comprising:

a first cover plate (1);

A second cover plate (2) arranged opposite to the first cover plate (1) along a first direction (z);

The electrical box body (3) comprises a first plate (31) and a second plate (32), wherein the first plate (31) is positioned between the first cover plate (1) and the second cover plate (2), and the first plate (31) is positioned at the end part of the second cover plate (2) along the second direction (x) and is used for installing a circuit board; the second plate (32) is connected angularly to the end of the first plate (31) along a third direction (y), the second direction (x) being perpendicular to the first direction (z), the third direction (y) being perpendicular to both the first direction (z) and the second direction (x); and

The electric appliance box cover (4) is buckled on one side, far away from the second cover plate (2), of the electric appliance box body (3) to form a cavity, the electric appliance box cover (4) comprises a third plate (41) and a fourth plate (42), the third plate (41) and the first plate (31) are oppositely arranged along the second direction (x), and the fourth plate (42) is connected with one end, close to the second cover plate (2), of the third plate (41) along the first direction (z) in an angled manner;

Wherein, second board (32) orientation keep away from the direction of second apron (2) extend and the butt in third board (41), second board (32) keep away from the one end of first board (31) is equipped with first recess (321), the side of first recess (321) is equipped with first hem (322), first hem (322) with second board (32) angle setting, fourth board (42) orientation second apron (2) extend and the butt in the tip of second apron (2).

2. The return air frame assembly of claim 1, further comprising a wire retaining member (7) mounted to the inside of the second plate (32) by fasteners (8) for retaining wires drawn from the circuit board.

3. The return air frame assembly according to claim 1, wherein the first groove (321) has a first side wall (321A), a second side wall (321B) and a third side wall (321C), 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, an opening is formed between second ends of the first side wall (321A) and the second side wall (321B), and a width of the first groove (321) at the opening is larger than a width of the groove bottom.

4. The return air frame assembly of claim 1, wherein the first recess (321) tapers in width from the opening to the bottom of the slot to form a trapezoidal recess.

5. The return air frame assembly of claim 1, wherein the first flap (322) is folded toward the inside of the second panel (32).

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

7. The return air frame assembly according to claim 1, wherein the second plate (32) has a second flange (324) at the edges of the second plate (32) at both sides of the first recess (321), and the second flange (324) is located inside the third plate (41) and is used for transitional connection with the third plate (41).

8. The return air frame assembly of claim 7, wherein a fold width of the first flap (322) relative to the second panel (32) is less than a fold width of the second flap (324) relative to the second panel (32).

9. The return air frame assembly according to any one of claims 1 to 8, wherein two sides 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 disposed at an angle to the second plate (32) and is abutted to the first cover plate (1), and the fourth folded edge (327) is disposed at an angle to the second plate (32) and is abutted to the second cover plate (2).

10. The return air frame assembly according to any one of claims 1-8, further comprising a bracket (5), the bracket (5) comprising first and second mounting plates (51, 52) connected at an angle, the first mounting plate (51) welded to a region of the first plate (31) facing away from the second plate (32) and extending in the first direction (z), the second mounting plate (52) extending in a direction facing away from the second plate (32);

The first cover plate (1) comprises a first main body plate (11) and a first flanging (12), the first flanging (12) is at least arranged at one end of the first main body plate (11) close to the second plate (32) along the third direction (y), and the first flanging (12) is positioned at the outer side of the second mounting plate (52) and connected with one end of the second mounting plate (52);

The second cover plate (2) comprises a second main body plate (21) and a second flanging (22), the second flanging (22) is at least arranged at one end, close to the second plate (32), of the first main body plate (11) along the third direction (y), and the second flanging (22) is positioned at the outer side of the second mounting plate (52) and connected with the other end of the second mounting plate (52).

11. The return air frame assembly according to any one of claims 1 to 8, wherein the first cover plate (1) is provided with a profiling part (13), the profiling part (13) integrally protrudes towards the inner side of the first cover plate (1), and the first plate (31) is provided with a second groove (311) for accommodating the profiling part (13) near the first side edge of the first cover plate (1).

12. The return air frame assembly according to claim 11, characterized in that the first plate (31) is provided with a third groove (312) for passing a wire near a first side of the first cover plate (1), the first side being provided with a fifth folded edge (313) in a region outside the third groove (312), the fifth folded edge (313) being angled to the first plate (31) and extending in a direction away from the second plate (32).

13. The return air frame assembly according to claim 12, characterized in that the fifth flange (313) is provided with a protrusion (314) at a position at the bottom of the third groove (312), and the protrusion (314) extends towards the outer side of the fifth flange (313) for being optionally fixed with the first cover plate (1).

14. The return air frame assembly according to claim 12, wherein the inner side wall of the third groove (312) is provided with a second stacking edge (315), and the second stacking edge (315) is stacked on one 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, wherein the first plate (31) is provided with a routing hole (318) for guiding a wire of a fan in the return air frame assembly to the circuit board, a third stacking edge (318 ') is arranged at an edge of the routing hole (318), and the third stacking edge (318') is stacked on one side, far away from the electrical box cover (4), of the first plate (31).

16. The return air frame assembly according to any one of claims 1-8, wherein the first plate (31) is provided with a fourth recess (316) adjacent to the second side of the second cover plate (2) for guiding the wires of the ambient temperature sensor to the circuit board, and the portions of the second side on both sides of the fourth recess (316) are each provided with a sixth fold (317), the sixth fold (317) being angled with respect to the first plate (31) and extending 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 disposed opposite each other, and the first ends of the first edge (316A) and the second edge (316B) are connected by the third edge (316C), and the second ends of the first edge (316A), the second edge (316B) and the third edge (316C) are each provided with a seventh flap (319), the seventh flap (319) being angled with respect to the first plate (31) and extending in a direction away from the second plate (32).

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

19. The return air frame assembly of claim 17, wherein the seventh flap (319) is trapezoidal and a width of a top portion of the seventh flap (319) is less than a width of a root portion.

20. An air conditioning apparatus comprising a return air frame assembly as claimed in any one of claims 1 to 19.

21. The air conditioning apparatus of claim 20, wherein the air conditioning apparatus comprises an air duct machine or a ceiling machine.