WO2024255878A1 - Supporting structure, rear-row air duct assembly, vehicle air-conditioning system and vehicle - Google Patents

Abstract

The present disclosure relates to a supporting structure, a rear-row air duct assembly, a vehicle air-conditioning system and a vehicle. The supporting structure comprises a supporting body; a bottom end of the supporting body is provided with a second mounting portion, which is configured to connect to a vehicle body floor panel, and a top end of the supporting body is provided with a bearing surface, which is configured to bear an air output side of a rear-row foot-blowing air duct; the shape of the bearing surface matches the shape of the side, facing the supporting body, of the air output side; and the bearing surface is provided with a first snap-fit portion, and the first snap-fit portion is connected in a fitted manner to a second snap-fit portion, which is arranged on the air output side. In this way, the air output side of the rear-row foot-blowing air duct can be fixed to the vehicle body floor panel by means of the supporting body, such that the position of the air output side of the rear-row foot-blowing air duct is relatively stable, and therefore, in a follow-up assembly process, the air output side does not offset relative to the vehicle body floor panel, thereby having a stable structure and facilitating a follow-up assembly; thus, the assembly efficiency is improved to a certain extent, and the assembly effect is good.

Description

Support structure, rear air duct assembly, vehicle air conditioning system and vehicle

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is based on Chinese patent applications with application numbers 202310725327.4 and 202321555580.1 and filing date June 16, 2023, and claims the priority of the above Chinese patent applications. The entire contents of the above Chinese patent applications are hereby introduced into this article as a reference.

Technical Field

The present disclosure relates to the field of vehicle technology, and in particular to a support structure, a rear air duct assembly, a vehicle air conditioning system and a vehicle.

Background Art

The rear foot duct is an important part of the vehicle's air-conditioning system. Its main function is to deliver hot and cold air from the air conditioner to the foot space of the rear seats in the cabin, so as to cool or warm the legs and feet of the rear passengers.

The rear foot duct is usually arranged between the vehicle body floor and the carpet. The air inlet of the rear foot duct is connected with the air outlet of the air conditioner, and the air outlet side of the rear foot duct passes through the avoidance hole on the carpet and extends to the foot space of the rear seat in the cabin.

Summary of the invention

In order to solve the above technical problems, the present disclosure provides a support structure, a rear air duct assembly, a vehicle air conditioning system and a vehicle.

In the first aspect, the present disclosure provides a support structure, including a support body; the bottom end of the support body has a second mounting portion for matching and connecting with a first mounting portion on a vehicle body floor, the top end of the support body has a bearing surface for supporting the air outlet side of a rear-row foot-blowing air duct, and the shape of the bearing surface matches the shape of the air outlet side facing the support body; a first clamping portion is provided on the bearing surface, and the first clamping portion is matched and connected with a second clamping portion provided on the air outlet side.

Optionally, the support body includes a support column and a support plate arranged at the top end of the support column; a side of the support plate facing away from the support column is formed as the bearing surface, the first clamping portion is arranged on the support plate, and the second mounting portion is arranged at the bottom end of the support column.

Optionally, there are at least two support columns, and at least two support columns are arranged at intervals along the circumference of the support plate at the bottom end of the support plate.

Optionally, the support body further includes a reinforcing rib connected to a junction between the support column and the support plate.

Optionally, at least two connecting ears are provided on the bearing surface, and at least two of the connecting ears are arranged on both sides of the air outlet side along the length direction of the bearing surface, and a connecting part is provided on each of the connecting ears, and the connecting part is used to connect with the air outlet grille covering the air outlet of the rear foot blowing air duct.

Optionally, there are at least two second mounting parts, at least two second mounting parts are arranged at intervals along the circumference of the support body, at least two first mounting parts are arranged at intervals on the vehicle body floor, and one first mounting part corresponds to one second mounting part; and/or, the first mounting part includes a first mounting hole, the second mounting part includes a second mounting hole matching the first mounting hole, and a fastener passing through the first mounting hole and the second mounting hole.

Optionally, the first clamping portion passes through a center line of the bearing surface in a length direction.

In a second aspect, the present disclosure provides a rear exhaust air duct assembly, comprising an air duct and a support structure as described in any one of the above embodiments, wherein the support structure is used to fix the air outlet side of the air duct to the bottom plate of the vehicle body.

Optionally, the first clamping portion includes a first clamping hole, and the second clamping portion includes a second clamping hole matching the first clamping hole and a clamping piece penetrating and clamped in the first clamping hole and the second clamping hole.

Optionally, the clamping member includes a clamping rod and a clamping cap arranged at the top end of the clamping rod; the clamping rod is passed through and clamped in the first clamping hole and the second clamping hole, and when the clamping rod is clamped into place with the first clamping hole and the second clamping hole, the clamping cap stops on the outer wall of the air outlet side facing away from the bearing surface.

In a third aspect, the present disclosure provides a rear exhaust air duct assembly, comprising an air duct, a supporting body and an air outlet grille; the supporting body is located below the air duct, and one end of the supporting body is fixedly connected to the air duct, and the other end of the supporting body is fixedly connected to the vehicle body bottom plate; the air outlet grille cover is arranged at the air outlet of the air duct, and a first connecting portion is provided on the supporting body, and a second connecting portion matching the first connecting portion is provided on the air outlet grille, and the air outlet grille is connected to the supporting body via the first connecting portion and the second connecting portion; a receiving groove is provided on the side of the air outlet grille facing the air duct, so that when the carpet is in place with the vehicle body bottom plate, the outer edge of the avoidance hole of the carpet matching the air outlet extends into the receiving groove.

Optionally, a stop protrusion is provided on a side of the air outlet grille facing the air duct, and the stop protrusion is arranged along the length direction of the air outlet grille and extends toward the supporting body, and the stop protrusion, the air outlet grille and the top wall of the air duct together enclose the accommodating groove; when the air outlet grille is connected to the supporting body in place, the outer edge of the avoidance hole extends into the accommodating groove and abuts against the stop protrusion.

Optionally, the stop protrusion is a stop plate arranged along the length direction of the air outlet grille.

Optionally, a first clamping portion is provided at the top of the support body, a second clamping portion matching the first clamping portion is provided at the air outlet side of the air duct, and the air outlet side and the support body are connected together through the first clamping portion and the second clamping portion.

Optionally, the first clamping portion includes a first clamping hole, and the second clamping portion includes a second clamping hole matching the first clamping hole and a clamping piece penetrating and clamped in the first clamping hole and the second clamping hole.

Optionally, the clamping member includes a clamping rod and a clamping cap arranged on the top of the clamping rod; the clamping rod passes through and is clamped in the first clamping hole and the second clamping hole, and the clamping cap is stopped on a surface of the air outlet side that is away from the support body.

Optionally, the air outlet includes a first outlet and a second outlet that are adjacent to and spaced apart from each other; and the second clamping portion is disposed between the first outlet and the second outlet.

Optionally, at least two first mounting holes are arranged at intervals along the circumference of the support body at the bottom end of the support body, at least two second mounting holes are arranged at intervals on the vehicle body bottom plate, one first mounting hole corresponds to one second mounting hole, and the bottom end of the support body is provided with a plurality of holes through the holes provided at the first mounting holes and the second mounting holes. The fasteners in the two mounting holes are connected to the vehicle body bottom plate.

Optionally, there are at least two first connection parts, at least two of which are spaced apart along the length direction of the support body and disposed on both sides of the air outlet, and there are at least two second connection parts, one second connection part corresponds to one first connection part.

Optionally, the first connecting portion is a slot, and the second connecting portion is a protrusion that can be inserted into the slot.

Optionally, a connecting ear is provided on the top of the supporting body, and the card slot is opened on the connecting ear.

Optionally, a reinforcing rib is provided on the side wall of the supporting body, the reinforcing rib extends in a direction from the air duct to the vehicle body bottom plate, and the reinforcing rib is located directly below the connecting ear.

In a fourth aspect, the present disclosure provides a vehicle air-conditioning system, comprising an air-conditioning box and a rear air duct assembly as described in any one of the above embodiments, wherein an air inlet of the rear air duct assembly is connected to an air-conditioning outlet of the air-conditioning box.

In a fifth aspect, the present disclosure provides a vehicle comprising at least one of the rear air duct assemblies described in any one of the above embodiments.

Compared with the prior art, the technical solution provided by the embodiments of the present disclosure has the following advantages:

The support structure provided by the present invention is provided with a support body, the bottom end of the support body is provided with a second mounting portion for matching and connecting with the first mounting portion on the vehicle body bottom plate, that is, the bottom end of the support body is connected with the vehicle body bottom plate; the top end of the support body is provided with a bearing surface for supporting the air outlet side of the rear-row foot-blowing air duct, the shape of the bearing surface matches the shape of the air outlet side facing the support body, and a first clamping portion is provided on the bearing surface, the first clamping portion is matched and connected with the second clamping portion provided on the air outlet side, so that when the first clamping portion on the bearing surface and the second clamping portion on the air outlet side are clamped together, the air outlet side is fixed on the bearing surface at the top end, that is, the top end of the support body is connected with the air outlet side of the rear-row foot-blowing air duct, so that the air outlet side of the rear-row foot-blowing air duct is fixed to the vehicle body bottom plate through the support body, so that the position of the air outlet side of the rear-row foot-blowing air duct is relatively stable, so that in the subsequent assembly process, the air outlet side will not be offset relative to the vehicle body bottom plate, the structure is stable, the position is accurate, and it is convenient for subsequent assembly, which improves the assembly efficiency to a certain extent and has a good assembly effect.

The rear air duct assembly, vehicle air conditioning system and vehicle provided by the present invention are provided with an air duct, a bracket and an air outlet grille, wherein the bracket is located below the air duct, and the top end of the bracket is fixedly connected to the air outlet side of the air duct, and the bottom end of the bracket is fixedly connected to the vehicle body floor, that is, the air outlet side of the air duct is fixed to the vehicle body floor through the bracket. The air outlet grille cover is arranged at the air outlet of the air duct, and the air outlet grille is also fixed to the bracket by matching the second connecting part thereon with the first connecting part on the bracket, and a receiving groove is arranged on the side of the air outlet grille facing the air duct, so that when the carpet is fitted into place with the bottom plate of the vehicle body, the edge of the avoidance hole of the carpet matching the air outlet extends into the receiving groove, so that the air outlet grille arranged at the air outlet of the air duct can not only hide the air outlet cover arrangement of the air duct, but also hide the edge of the avoidance hole on the carpet, that is, the air outlet grille blocks the air outlet of the air duct and the boundary of the avoidance hole of the carpet, so that both are not exposed, so that the rear passengers will not see the air outlet of the air duct and the boundary of the avoidance hole of the carpet, thereby improving the integrity and aesthetics of the cabin, enhancing the refinement and luxury of the appearance, and thus improving the user experience.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present disclosure and Together with the description, they serve to explain the principles of the present disclosure.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

FIG1 is an axonometric view of a support structure according to an embodiment of the present disclosure from a first viewing angle;

FIG2 is an axonometric diagram of the support structure according to an embodiment of the present disclosure from a second viewing angle;

FIG3 is a top view of the support structure according to an embodiment of the present disclosure;

FIG4 is an assembly diagram of the rear air duct assembly and the vehicle body floor according to an embodiment of the present disclosure;

FIG5 is a top view of the support structure, the air outlet side of the air duct and the vehicle body bottom plate according to an embodiment of the present disclosure;

FIG6 is an assembly diagram of the rear exhaust air duct assembly according to an embodiment of the present disclosure;

FIG7 is a partial structural schematic diagram of the rear air duct assembly according to an embodiment of the present disclosure;

FIG8 is an axonometric view of the rear air duct assembly according to an embodiment of the present disclosure;

FIG9 is a schematic diagram of a partial structure of a rear exhaust air duct assembly according to an embodiment of the present disclosure;

FIG. 10 is a schematic diagram of another partial structure of the rear exhaust air duct assembly according to an embodiment of the present disclosure.

Among them, 1. air duct; 11. air outlet side; 12. air outlet; 121. first outlet; 122. second outlet; 2. support body; 21. support column; 22. bearing surface; 23. second mounting part; 24. support plate; 3. air outlet grille; 31. stop convex part; 32. grille body; 33. air supply port; 41. first connecting part; 42. second connecting part; 5. accommodating groove; 6. connecting ear; 7. reinforcing rib; 81. first clamping part; 82. second clamping part; 821. second clamping hole; 822. clamping piece; 8221. clamping rod; 8222. clamping cap; 9. vehicle body bottom plate; 91. first mounting part; 92. carpet.

DETAILED DESCRIPTION

In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

Embodiment 1

In the related art, the air outlet side of the rear foot duct is unstable, resulting in poor stability of the air outlet side, low assembly efficiency and poor assembly effect during the subsequent assembly process, such as when the carpet is inserted into the air outlet side of the rear air duct section.

1 to 7 , the present embodiment provides a support structure, including a support body 2 , wherein the support body 2 is located between the air outlet side 11 of the air duct 1 and the vehicle body bottom plate 9 .

Specifically, referring to Figures 1, 3 to 7, the bottom end of the support body 2 has a second mounting portion 23 for matching and connecting with the first mounting portion 91 on the vehicle body bottom plate 9. The top end of the support body 2 has a bearing for supporting the air outlet side 11. The bearing surface 22 has a shape that matches the shape of the side of the air outlet side 11 that faces the support body 2; the bearing surface 22 is provided with a first clamping portion 81, and the air outlet side 11 is provided with a second clamping portion 82 that matches and clamps with the first clamping portion 81. When the first clamping portion 81 and the second clamping portion 82 are clamped together, the air outlet side 11 is fixed on the bearing surface 22.

That is to say, the bottom end of the support body 2 is fixed to the vehicle body bottom plate 9 by matching connection of the first mounting portion 91 and the second mounting portion 23, and the top end of the support body 2 is fixedly connected to the air outlet side 11 of the air duct 1 by matching clamping of the first clamping portion 81 and the second clamping portion 82, so that the air outlet side 11 of the air duct 1 is fixed to the vehicle body bottom plate 9 by the support body 2, so that the position of the air outlet side 11 of the air duct 1 is relatively stable. In this way, when the air outlet side 11 of the air duct 1 is assembled with the vehicle body bottom plate 9, the position of the air outlet side 11 of the air duct 1 relative to the vehicle body bottom plate 9 is fixed, and the air outlet side 11 of the air duct 1 will not be displaced. The structure is stable and the position is precise, which is convenient for subsequent assembly, thereby improving the assembly efficiency and assembly effect.

In specific implementation, the air outlet side 11 of the air duct 1 is fixedly connected to the vehicle body bottom plate 9 through the support body 2, so that the position of the air outlet side 11 relative to the vehicle body bottom plate 9 is fixed and unchanged, thereby improving the structural stability and position accuracy of the air outlet side 11. For example, when assembling the carpet 92, when the air outlet side 11 cooperates with the avoidance hole on the carpet 92 through which the air outlet 12 of the air duct 1 passes, the position of the air outlet side 11 will not be offset, and the matching degree and consistency between the air outlet side 11 and the avoidance hole are good, thereby avoiding the inconvenience of the installation of the carpet 92 caused by the offset of the position of the air outlet side 11 or the partial non-fitting and shape mismatch between the carpet 92 and the vehicle body bottom plate 9, facilitating the assembly of the carpet 92, and improving the assembly efficiency and assembly effect of the carpet 92 to a certain extent.

The following embodiment is explained and illustrated by taking the convenience of assembling the carpet 92 as an example.

Referring to Figures 1 to 4, the bottom of the air outlet side 11 is fixedly connected to the bearing surface 22 at the top of the supporting body 2, and the shape of the bearing surface 22 matches the shape of the side of the air outlet side 11 facing the supporting body 2, so that the air outlet side 11 and the bearing surface 22 have a high degree of fit and a large contact area, thereby improving the connection strength between the air outlet side 11 and the bearing surface 22, making the structural stability and position accuracy of the air outlet side 11 higher, further facilitating subsequent assembly, and helping to improve the overall assembly efficiency of the vehicle.

The support structure provided in this embodiment is provided by arranging a support body 2 between the air outlet side 11 of the air duct 1 and the vehicle body bottom plate 9, and the bottom end of the support body 2 has a second mounting portion 23 for matching and connecting with the first mounting portion 91 on the vehicle body bottom plate 9, that is, the bottom end of the support body 2 is connected with the vehicle body bottom plate 9; the top end of the support body 2 has a bearing surface 22 for bearing the air outlet side 11, the shape of the bearing surface 22 matches the shape of the side of the air outlet side 11 facing the support body 2, and the bearing surface 22 is provided with a first clamping portion 81, and the air outlet side 11 is provided with a second clamping portion 82. When the two clamping parts 82, the first clamping part 81 and the second clamping part 82 are clamped together, the air outlet side 11 is fixed on the bearing surface 22 at the top, that is, the top of the supporting body 2 is connected to the air outlet side 11 of the air duct 1, so that the air outlet side 11 of the air duct 1 is fixed on the vehicle body bottom plate 9 through the supporting body 2, so that the position of the air outlet side 11 of the air duct 1 is relatively stable. In this way, during the subsequent assembly process, the air outlet side 11 will not be offset relative to the vehicle body bottom plate 9, the structure is stable, the position is accurate, and it is convenient for subsequent assembly, which improves the assembly efficiency to a certain extent and has a better assembly effect.

In some embodiments, referring to Figures 1, 2, 5 and 6, the support body 2 includes a support column 21 and a support plate 24 disposed at the top of the support column 21. The side of the support plate 24 that is away from the support column 21 is formed as a bearing surface 22, that is, the top surface of the support plate 24 is formed as the bearing surface 22, the first clamping portion 81 is disposed on the support plate 24, and the second mounting portion 23 is disposed at the bottom end of the support column 21, which has a simple structure, is easy to manufacture, and is convenient and reliable to connect.

In some implementations, the support column 21 can be integrally formed with the support plate 24, for example, with good integrity and high load-bearing performance.

In specific implementation, the bottom end of the support column 21 can be detachably connected to the vehicle body bottom plate 9, for example, by matching the first mounting portion 91 and the second mounting portion 23, and the top end of the support column 21 can be detachably connected to the air outlet side 11, for example, by matching the first clamping portion 81 and the second clamping portion 82. On the one hand, it is convenient to disassemble and assemble. On the other hand, if one of the support structure, the air outlet side 11 of the air duct 1, and the vehicle body bottom plate 9 is damaged and needs to be replaced, only the damaged one needs to be disassembled and separated for replacement, which saves costs to a certain extent.

In some embodiments, referring to FIGS. 1 to 3 , there are at least two support columns 21 , and at least two support columns 21 are disposed at the bottom end of the support plate 24 at intervals along the circumference of the support plate 24 .

In specific implementation, a second mounting portion 23 is provided at the bottom end of each support column 21, and a first mounting portion 91 is provided at a position of the vehicle body floor 9 corresponding to each second mounting portion 23. That is to say, at least two sets of matching first mounting portions 91 and second mounting portions 23 are arranged between the support structure and the vehicle body floor 9, thereby making the connection strength between the support structure and the vehicle body floor 9 higher, improving the connection strength between the support structure and the vehicle body floor 9, and thus improving the bearing performance of the support structure on the air outlet side 11.

Exemplarily, with continued reference to FIGS. 1 to 3 , three support columns 21 are provided at the bottom end of the support plate 24, a second mounting portion 23 is provided at the bottom end of each support column 21, three first mounting portions 91 are provided on the vehicle body floor 9, one first mounting portion 91 corresponds to one second mounting portion 23, and the support structure is fixedly connected to the vehicle body floor 9 by three groups of first mounting portions 91 and second mounting portions 23.

In other embodiments, a larger support column 21 may also be disposed at the bottom end of the support plate 24 .

In some embodiments, referring to FIG. 1 , FIG. 2 and FIG. 7 , the support body 2 further includes a reinforcing rib 7 , and the reinforcing rib 7 is connected at the junction of the support column 21 and the support plate 24 .

In specific implementation, the reinforcing rib 7 is arranged along the height direction of the supporting body 2, one end of the reinforcing rib 7 is connected to the bottom surface of the supporting plate 24, and the other end of the reinforcing rib 7 is connected to the outer wall of the supporting column 21, so that the structural strength between the supporting column 21 and the supporting plate 24 can be enhanced, so that the structural stability of the supporting structure is higher, thereby improving the bearing performance of the air outlet side 11 and further improving the stability of the air outlet side 11.

In some implementations, with continued reference to FIGS. 1 , 2 , and 7 , the reinforcing rib 7 may be formed, for example, as a reinforcing plate, which is arranged along the height direction of the support body 2 , and the side wall of the reinforcing plate facing the support structure is abutted and connected with the support plate 24 and the support column 21 .

In some embodiments, referring to Figures 1 and 2, at least two connecting ears 6 are provided on the bearing surface 22, and at least two connecting ears 6 are arranged on both sides of the air outlet side 11 along the length direction of the bearing surface 22, and a first connecting portion 41 is provided on each connecting ear 6, and the first connecting portion 41 is used to connect to the air outlet grille 3 covered at the air outlet 12 of the air duct 1, so as to facilitate the connection and fixation of the air outlet grille 3 to the supporting structure.

In a specific implementation, the connection ear 6 can be integrally formed with the bearing surface 22, for example, so as to have good integrity and higher structural strength, thereby increasing the connection strength between the air outlet grille 3 and the supporting structure.

The connecting ears 6 can, for example, extend vertically upward in a direction away from the bearing surface 22 , with a reasonable layout and higher space utilization.

In the specific implementation, referring to Figures 4 to 6, the air outlet grille 3 is covered at the air outlet 12 of the air duct 1, so that the air outlet grille 3 can cover the air outlet 12 of the air duct 1 so that the air outlet 12 is not exposed. In other words, the air outlet grille 3 covers and hides the air outlet 12 of the air duct 1, so that the rear passengers cannot see the air outlet 12 of the air duct 1, which has good aesthetics and enhances the user experience.

In some embodiments, referring to Figures 1 to 3, there are at least two second mounting portions 23, at least two second mounting portions 23 are arranged at intervals along the circumference of the support body 2, and at least two first mounting portions 91 are arranged at intervals on the vehicle body floor 9, and one first mounting portion 91 corresponds to one second mounting portion 23.

That is to say, at least two sets of matching first mounting portions 91 and second mounting portions 23 are arranged between the support structure and the vehicle body floor 9, so that the connection strength between the support structure and the vehicle body floor 9 is higher, thereby improving the connection strength between the support structure and the vehicle body floor 9, thereby improving the bearing performance of the support structure on the air outlet side 11.

In some embodiments, the first mounting portion 91 includes a first mounting hole, the second mounting portion 23 includes a second mounting hole matching the first mounting hole and a fastener passing through the first mounting hole and the second mounting hole. That is to say, a first mounting hole is opened on the vehicle body floor 9, and a second mounting hole is opened at the bottom end of the support column 21. In this way, the bottom end of the support body 2 is connected to the vehicle body floor 9 by fasteners passing through the first mounting hole and the second mounting hole. The structure is simple, easy to manufacture, and the connection is convenient and reliable.

In some implementations, the first mounting hole and the second mounting hole may be, for example, threaded holes with internal threads, and the fastener may be, for example, a bolt with external threads.

In some embodiments, referring to Figures 1 to 3, the first clamping portion 81 passes through the center line of the bearing surface 22 in the length direction, and correspondingly, the second clamping portion 82 is arranged in the middle of the air outlet side 11 along the length direction of the bearing surface 22, so that the connection position between the air outlet side 11 and the bearing surface 22 is located in the middle position between the two, which improves the connection stability between the air outlet side 11 and the bearing surface 22 to a certain extent, thereby further improving the stability and position accuracy of the air outlet side 11.

Embodiment 2

The present embodiment further provides a rear exhaust air duct assembly, which includes an air duct and a support structure, wherein the support structure is used to fix the air outlet side of the air duct to the bottom plate of the vehicle body.

The air duct in this embodiment may be the air duct 1 in Embodiment 1. The support structure in this embodiment may have the same specific structure and implementation principle as the support structure provided in Embodiment 1, and may bring the same or similar technical effects, which will not be described one by one here, and the specific details may refer to the description of the above embodiment.

In some embodiments, referring to Figures 1 to 4, the first clamping portion 81 includes a first clamping hole, the second clamping portion 82 includes a second clamping hole 821 matching the first clamping hole and a clamping member 822 that passes through and is clamped in the first clamping hole and the second clamping hole 821. It is easy to manufacture, convenient and reliable to connect, and has high structural stability.

During specific assembly, the air outlet side 11 of the air duct 1 is placed on the bearing surface 22 of the supporting body 2, the first clamping hole and the second clamping hole 821 are aligned, the clamping member 822 is penetrated in the first clamping hole and the second clamping hole 821, and is clamped together with the first clamping hole and the second clamping hole 821, so that the air outlet side 11 of the air duct 1 can be connected and fixed on the bearing surface 22, and the connection is convenient and reliable, so that the position of the air outlet side 11 of the air duct 1 relative to the vehicle body bottom plate 9 remains unchanged, the structural stability and position accuracy of the air outlet side 11 are improved, and the matching degree and consistency between the air outlet side 11 and the avoidance hole on the carpet 92 are better, thereby avoiding The inconvenience in installing the carpet 92 or the partial mismatch or shape mismatch between the carpet 92 and the vehicle body bottom plate 9 caused by the offset of the position of the air outlet side 11 is avoided, thereby improving the installation convenience and assembly effect of the carpet 92.

In some embodiments, referring to FIG4 and FIG6 , the clamping member 822 includes a clamping rod 8221 and a clamping cap 8222 disposed at the top of the clamping rod 8221. The clamping rod 8221 is inserted into and clamped in the first clamping hole and the second clamping hole 821, and when the clamping rod 8221 is clamped in place with the first clamping hole and the second clamping hole 821, the clamping cap 8222 stops on the outer wall of the air outlet side 11 on the side away from the bearing surface 22.

By setting the clamping member 822 as a clamping rod 8221 and a clamping cap 8222, the clamping cap 8222 is connected to the top of the clamping. When the clamping rod 8221 is inserted into and clamped in the first clamping hole and the second clamping hole 821, the clamping cap 8222 stops on the top wall of the air outlet side 11, so that the reliability and stability of the connection between the air outlet side 11 and the support body 2 in the Z direction are improved while achieving the connection and fixing of the air outlet side 11, and further improving the structural stability and position accuracy of the air outlet side 11, so that the matching degree and consistency between the air outlet side 11 and the avoidance hole on the carpet 92 are better, thereby further improving the installation convenience and assembly effect of the carpet 92.

It should be noted that the Z direction is the direction between the air outlet side 11 and the bearing surface 22 , that is, the height direction of the automobile.

Embodiment 3

In the related art, the air outlet of the rear air duct section and the outer edges of the avoidance hole matching the carpet and the rear air duct section are exposed, so that the rear passengers can see them by just lowering their heads slightly, which has poor aesthetics and affects the customer experience.

Referring to FIGS. 1 to 10 , this embodiment provides a rear air duct assembly, which is arranged between the vehicle body bottom plate 9 and the carpet 92, and includes an air duct 1, a support body 2, and an air outlet grille 3. The carpet 92 is provided with an avoidance hole matching the air outlet 12 of the air duct 1. When the carpet 92 is fitted and installed in place with the vehicle body bottom plate 9, the air outlet 12 of the air duct 1 is inserted into the avoidance hole of the carpet 92.

Specifically, referring to Figures 4 and 6-10, the support body 2 is located below the air duct 1, and one end of the support body 2 is fixedly connected to the air duct 1, and the other end of the support body 2 is fixedly connected to the vehicle body bottom plate 9, that is, the air outlet side 11 of the air duct 1 is fixedly connected to the vehicle body bottom plate 9 through the support body 2, so that the position of the air outlet side 11 of the air duct 1 is fixed, and the structural stability and position accuracy are high. Furthermore, when installing the carpet 92, the position of the air outlet side 11 of the air duct 1 will not shift, so that the coordination and consistency between the air outlet 12 of the air duct 1 and the avoidance of the carpet 92 are better, thereby avoiding the inconvenience of installing the carpet 92 due to the offset of the position of the air outlet side 11 of the air duct 1 when installing the carpet 92, and the occurrence of partial non-fitting and non-conformity of the carpet 92, thereby improving the convenience of installation and assembly effect of the carpet 92, and the assembly efficiency is high.

Exemplarily, one end of the support body 2 may be connected to the air outlet side 11 of the air duct 1 .

In specific implementation, referring to FIGS. 6 to 10 , the support body 2 includes a support column 21 and a bearing surface 22 disposed at the top of the support column 21, and the bottom end of the support column 21, i.e., the end away from the bearing surface 22, is fixedly connected to the vehicle body bottom plate 9. The bearing surface 22 is used to bear the outlet side 11 of the air duct 1, and the outlet side 11 of the air duct 1 is placed on the bearing surface 22 and fixedly connected to the bearing surface 22.

For example, a plurality of support columns 21 may be provided, and the plurality of support columns 21 are arranged between the vehicle body bottom plate 9 and the load-bearing surface 22 at intervals along the circumferential direction of the load-bearing surface 22. Of course, only one support column 21 may also be provided.

In addition, the bearing surface 22 and the support column 21 can be integrally formed, for example, with good integrity, high structural strength, and excellent bearing performance.

In some implementations, the shape of the side of the bearing surface 22 facing the air duct 1 matches the shape of the outer wall of the air duct 1, so that the contact area between the air outlet side 11 of the air duct 1 and the bearing surface 22 is larger, thereby improving the bearing performance of the bearing surface 22 on the air duct 1.

Specifically, referring to Figures 8 to 10, the air outlet grille 3 is covered at the air outlet 12 of the air duct 1, so that the air outlet grille 3 can cover the air outlet 12 of the air duct 1 so that the air outlet 12 is not exposed. In other words, the air outlet grille 3 covers and hides the air outlet 12 of the air duct 1, so the rear passengers cannot see the air outlet 12 of the air duct 1, which has good aesthetics and enhances the user experience.

In some implementations, referring to Figures 1-10, a first connection portion 41 is provided on the support body 2, and a second connection portion 42 matching the first connection portion 41 is provided on the air outlet grille 3. The air outlet grille 3 is connected to the support body 2 through the first connection portion 41 and the second connection portion 42. The structure is simple and easy to manufacture. The air outlet grille 3 can be connected to the support body 2 relatively conveniently, and the connection is stable and reliable.

As shown in FIG. 4 , a receiving groove 5 is provided on the side of the air outlet grille 3 facing the air duct 1 . When the carpet 92 is in place with the vehicle body bottom plate 9 , the outer edge of the avoidance hole of the carpet 92 matching the air outlet 12 extends into the receiving groove 5 .

That is to say, while the air outlet grille 3 covers and hides the air outlet 12, it also covers and hides the boundaries of the avoidance holes on the carpet 92, so that the air outlet 12 of the air duct 1 and the boundaries of the avoidance holes of the carpet 92 are not exposed. In other words, the rear passengers will not see the air outlet 12 of the air duct 1 and the boundaries of the avoidance holes of the carpet 92, and the overall consistency is good, which further improves the aesthetics of the vehicle cabin, enhances the refinement and luxury of the appearance, and further enhances the user experience.

Among them, in the direction from the air outlet grille 3 to the carpet 92, the dimension of the edge of the avoidance hole extending into the accommodating groove 5 is not less than 8 mm, the fit is better, the shielding effect is better, and the aesthetics is higher.

In specific implementation, the air outlet grille 3 may include a grille body 32 and an air outlet 33 provided on the grille body 32, wherein the air outlet 33 may be a larger air outlet or may include a plurality of small air outlets arranged at intervals. In addition, a grille is rotatably connected to the air outlet 33.

The rear air duct assembly, vehicle air conditioning system and vehicle provided in the present embodiment are provided with an air duct 1, a supporting body 2 and an air outlet grille 3. The supporting body 2 is located below the air duct 1, and the top end of the supporting body 2 is fixedly connected to the air outlet side 11 of the air duct 1, and the bottom end of the supporting body 2 is fixedly connected to the vehicle body bottom plate 9, that is, the air outlet side 11 of the air duct 1 is fixed to the vehicle body bottom plate 9 through the supporting body 2. The air outlet grille 3 is provided at the air outlet 12 of the air duct 1, and the air outlet grille 3 is also fixed to the supporting body 2 by the matching connection between the second connecting portion 42 thereon and the first connecting portion 41 on the supporting body 2, and a receiving groove 5 is provided on the side of the air outlet grille 3 facing the air duct 1, so that when the carpet 92 is in place with the vehicle body bottom plate 9, the edge of the avoidance hole of the carpet 92 matching the air outlet 12 extends into the receiving groove 5, so that the air outlet grille 3 provided at the air outlet 12 of the air duct 1 can be The air outlet 12 of the air duct 1 is covered and hidden, and the edge of the avoidance hole on the carpet 92 can also be covered and hidden. In other words, the air outlet grille 3 covers the air outlet 12 of the air duct 1 and the boundary of the avoidance hole of the carpet 92, so that neither of them is exposed, so that the rear passengers will not see the air outlet 12 of the air duct 1 and the boundary of the avoidance hole of the carpet 92, thereby improving the integrity and aesthetics of the cabin, enhancing the exquisiteness and luxury of the appearance, and further improving the user experience. At the same time, since the air outlet side 11 of the air duct 1 is fixed to the bottom plate 9 of the vehicle body through the support body 2, The position of the air outlet side 11 of the air duct 1 relative to the vehicle body bottom plate 9 is fixed. Compared with the solution in the prior art in which there is no connection between the air outlet side 11 of the air duct 1 and the vehicle body bottom plate 9, the structural stability and position accuracy of the air outlet side 11 of the air duct 1 are improved, so that the air outlet 12 of the air duct 1 and the avoidance hole of the carpet 92 have better coordination and consistency, thereby avoiding the inconvenience in the installation of the carpet 92 due to the offset of the position of the air outlet 12 of the air duct 1 or the partial mismatch between the carpet 92 and the vehicle body bottom plate 9 and the shape mismatch, thereby improving the installation convenience and assembly effect of the carpet 92.

In some embodiments, as shown in reference figure 4, a stop protrusion 31 is provided on one side of the air outlet grille 3 facing the air duct 1, and the stop protrusion 31 is provided along the length direction of the air outlet grille 3 and extends toward the supporting body 2, and the stop protrusion 31, the air outlet grille 3 and the top wall of the air duct 1 together enclose a receiving groove 5; when the air outlet grille 3 is connected to the supporting body 2 in place, the outer edge of the avoidance hole extends into the receiving groove 5 and abuts against the stop protrusion 31.

That is to say, when the air outlet grille 3 is connected to the supporting body 2 in place, the stop protrusion 31, the air outlet grille 3 and the air duct 1 together define the accommodating groove 5, and the edge of the avoidance hole is accommodated and hidden in the accommodating groove 5, so that the edge of the avoidance hole is not exposed, the aesthetics is better, and the user experience is enhanced.

In specific implementation, the carpet 92 can be directly placed and laid on the air duct 1 in the direction from the air duct 1 to the vehicle body bottom plate 9, that is, in the Z direction, without the need for other assembly actions, so that the air duct 1 and the carpet 92 do not affect each other. Therefore, during the installation of the carpet 92, the air duct 1 will not interfere with the installation of the carpet 92, and the assembly is convenient. To a certain extent, the phenomenon of partial non-fit and non-conformity between the carpet 92 and the vehicle body bottom plate 9 is avoided.

In some embodiments, the stopping protrusion 31 is a stopping plate provided along the length direction of the air outlet grille 3 , which has a simple structure, is easy to manufacture, and has a good stopping effect on the carpet 92 .

In some other embodiments, the stopping protrusion 31 includes a plurality of stopping protrusions, and the plurality of stopping protrusions are arranged at intervals along the length direction of the air outlet grille 3 .

In some embodiments, referring to Figures 1-10, a first clamping portion 81 is provided at the top of the support body 2, and a second clamping portion 82 matching the first clamping portion 81 is provided on the air outlet side 11 of the air duct 1. The air outlet side 11 and the support body 2 are connected together through the first clamping portion 81 and the second clamping portion 82. The connection is convenient and reliable, and the structural stability is high.

In some implementations, the first clamping portion 81 includes a first clamping hole, and the second clamping portion 82 includes a second clamping hole 821 matching the first clamping hole and a clamping member 822 penetrating and clamped in the first clamping hole and the second clamping hole 821 .

During specific assembly, the air outlet side 11 of the air duct 1 is placed on the bearing surface 22 of the supporting body 2, the first clamping hole and the second clamping hole 821 are aligned, the clamping piece 822 is inserted into the first clamping hole and the second clamping hole 821, and clamped together with the first clamping hole and the second clamping hole 821, so that the air outlet side 11 of the air duct 1 can be connected and fixed to the supporting body 2, and the connection is convenient and reliable, so that the position of the air outlet side 11 of the air duct 1 relative to the vehicle body bottom plate 9 remains unchanged, the structural stability and position accuracy of the air outlet side 11 are improved, and the air outlet 12 of the air duct 1 and the avoidance hole of the carpet 92 have better matching and consistency, thereby avoiding the inconvenience of the installation of the carpet 92 due to the offset of the position of the air outlet 12 of the air duct 1 or the occurrence of partial non-fit and shape mismatch between the carpet 92 and the vehicle body bottom plate 9, thereby improving the installation convenience and assembly effect of the carpet 92.

In some embodiments, as shown in FIG. 6 , the clamping member 822 includes a clamping rod 8221 and a clamping cap 8222 disposed on the top of the clamping rod 8221; the clamping rod 8221 is inserted into and clamped in the first clamping hole and the second clamping hole 821, and the clamping cap 8222 is stopped on the side of the air outlet side 11 away from the support body 2, thereby improving the reliability of the connection between the air duct 1 and the support body 2 in the Z direction. and stability, further improving the structural stability and position accuracy of the air outlet side 11, so that the air outlet 12 of the air duct 1 and the avoidance hole of the carpet 92 have better coordination and consistency, thereby further improving the installation convenience and assembly effect of the carpet 92.

In some embodiments, as shown in FIG. 7 , the air outlet 12 includes a first outlet 121 and a second outlet 122 that are adjacent and spaced apart, and the second clamping portion 82 is disposed between the first outlet 121 and the second outlet 122 .

The second clamping portion 82 is arranged between the first outlet 121 and the second outlet 122. On the basis of not affecting the air outlet, the connection between the air outlet side 11 and the supporting body 2 is more convenient, the layout is more flexible, and it will not interfere with the assembly of the air outlet grille 3, and the space utilization rate is higher.

In some embodiments, referring to Figures 1-10, at least two second mounting holes are provided at the bottom end of the support body 2, and the at least two second mounting holes are arranged at intervals along the circumference of the support body 2. At least two first mounting holes are provided at intervals on the vehicle body bottom plate 9, and one first mounting hole corresponds to one second mounting hole. The bottom end of the support body 2 is connected to the vehicle body bottom plate 9 by fasteners passed through the first mounting holes and the second mounting holes. It is easy to manufacture, and the connection is convenient and reliable, so that the connection strength between the support body 2 and the vehicle body bottom plate 9 is higher.

In specific implementation, a plurality of support columns 21 are arranged at the bottom of the support body 2, and the plurality of support columns 21 are arranged at intervals along the circumference of the support body 2. The bottom of each support column 21 is provided with at least one second mounting hole for connecting with the vehicle body floor 9. The layout is reasonable, and the connection is convenient and reliable.

In some implementations, the first mounting hole and the second mounting hole may be, for example, threaded holes with internal threads, and the fastener may be, for example, a bolt with external threads.

In some embodiments, there are at least two first connection parts 41 , at least two first connection parts 41 are spaced apart along the length direction of the support body 2 and are disposed on both sides of the air outlet 12 , and there are at least two second connection parts 42 , one second connection part 42 corresponds to one first connection part 41 .

That is to say, the supporting body 2 and the air outlet grille 3 are connected together by multiple sets of matching first connecting parts 41 and second connecting parts 42, that is, multiple sets of connecting structures are arranged between the supporting body 2 and the air outlet grille 3, so that the connection strength between the supporting body 2 and the air outlet grille 3 is higher and the connection stability is better, thereby making the structural stability of the rear exhaust duct assembly of this embodiment higher.

In some embodiments, as shown in reference figure 8, the first connecting part 41 is a card slot, and the second connecting part 42 is a card protrusion that can be inserted into the card slot. The air outlet grille 3 can be connected to the supporting body 2 through the card connection of the card slot and the card protrusion. The structure is simple, easy to manufacture, and the connection is convenient and reliable.

In other embodiments, the first connection portion 41 may be, for example, a latching protrusion disposed on the support body 2 , and the second connection portion 42 may be a latching groove disposed on the air outlet grille 3 .

In some embodiments, referring to FIG. 7 , a connecting ear 6 is disposed on the top of the supporting body 2 , and a slot is provided on the connecting ear 6 .

A connecting ear 6 is provided on the top of the supporting body 2, and a card slot is provided on the connecting ear 6. On the one hand, a larger assembly space is provided for the assembly of the air outlet grille 3, which is convenient for installation and disassembly. On the other hand, the card slot does not need to be directly provided on the bearing surface 22 of the supporting body 2, so that the structural strength of the supporting body 2 is higher and the bearing performance is better. At the same time, the card slot does not occupy the space of the bearing surface 22, which provides a larger layout space for the air duct 1.

Continuing to refer to FIG. 8 , in some embodiments, a reinforcing rib 7 is provided on the side wall of the support body 2 , the reinforcing rib 7 extends in a direction from the air duct 1 to the vehicle body bottom plate 9 , and the reinforcing rib 7 is located directly below the connecting ear 6 .

It should be noted that the air duct 1 is usually arranged above the vehicle body floor 9 , and the support body 2 is located between the air duct 1 and the vehicle body floor 9 , so the height direction of the support body 2 is consistent with the direction from the air duct 1 to the vehicle body floor 9 .

That is to say, along the height direction of the support body 2, a reinforcing rib 7 is provided on the side wall of the support body 2, and the reinforcing rib 7 is specifically provided on the side wall of the support column 21, and is connected to the bottom surface of the bearing surface 22, and the reinforcing rib 7 is located below the connecting ear 6. The reinforcing rib 7 is provided below the connecting ear 6, on the one hand, to enhance the structural strength between the support column 21 and the bearing surface 22, so that the structural strength of the support body 2 is higher, and the bearing performance of the air duct 1 and the air outlet grille 3 is better. On the other hand, the structural strength of the support body 2 at the connecting ear 6 can be improved, thereby avoiding the occurrence of stress concentration or fracture of the support body 2 at the connecting ear 6 to a certain extent, thereby improving the connection strength and structural stability between the air outlet grille 3 and the support body 2, so that the structural stability of the rear air duct assembly of this embodiment is better.

In a specific implementation, a plurality of connecting ears 6 are disposed on the top of the bearing surface 22 , and the plurality of connecting ears 6 are disposed on both sides of the air outlet 12 . At least one first connecting portion 41 is disposed on each connecting ear 6 .

Exemplarily, as shown in FIG7 , two connecting ears 6 are provided on the supporting body 2, and the two connecting ears 6 are spaced apart on the bearing surface 22 along the length direction of the air outlet grille 3, and the two connecting ears 6 are arranged on both sides of the air duct 1, and a slot for connecting to the air outlet grille 3 is respectively provided on the two connecting ears 6.

Embodiment 4

The present embodiment further provides a vehicle air-conditioning system, which includes an air-conditioning box and a rear air duct assembly, wherein an air inlet of the rear air duct assembly is connected to an air-conditioning outlet of the air-conditioning box.

The rear exhaust air duct assembly in this embodiment can be the same as the specific structure and implementation principle of the rear exhaust air duct assembly provided in the above-mentioned embodiment 2 or the above-mentioned embodiment 3, and can bring the same or similar technical effects, which will not be described one by one here, and the details can be referred to the description of the above-mentioned embodiments.

Embodiment 5

The present embodiment also provides a vehicle, which includes at least one of the rear air duct assemblies.

The rear exhaust air duct assembly in this embodiment has the same specific structure and implementation principle as the rear exhaust air duct assembly provided in the above-mentioned embodiment 2 or the above-mentioned embodiment 3, and can bring the same or similar technical effects, which will not be described one by one here, and the details can be referred to the description of the above-mentioned embodiments.

As an example, the vehicle includes an air duct 1 , a vehicle body bottom plate 9 , and a support structure. An air outlet side 11 of the air duct 1 is fixed to the top end of the support structure, and a bottom end of the support structure is fixed to the vehicle body bottom plate 9 .

Among them, the supporting structure in this embodiment can be the same as the specific structure and implementation principle of the supporting structure provided in Example 1, and can bring the same or similar technical effects. They will not be described one by one here, and please refer to the description of the above embodiment for details.

It should be noted that, in this document, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover The term "includes" or "includes" a non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of more restrictions, an element defined by the phrase "includes a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (23)

A support structure, characterized in that it comprises a support body; The bottom end of the support body has a second mounting portion for matching and connecting with the first mounting portion on the vehicle body bottom plate, and the top end of the support body has a bearing surface for bearing the air outlet side of the rear row foot blowing air duct, and the shape of the bearing surface matches the shape of the air outlet side facing the support body; A first clamping portion is disposed on the bearing surface, and the first clamping portion is matched and connected with a second clamping portion disposed on the air outlet side. The support structure according to claim 1, characterized in that the support body comprises a support column and a support plate arranged on the top of the support column; A side of the support plate facing away from the support column is formed as the bearing surface, the first clamping portion is arranged on the support plate, and the second mounting portion is arranged at the bottom end of the support column. The support structure according to claim 2, characterized in that there are at least two support columns, and at least two of the support columns are arranged at intervals along the circumference of the support plate at the bottom end of the support plate; and/or, The support body further comprises a reinforcing rib connected to a junction of the support column and the support plate. The support structure according to any one of claims 1 to 3 is characterized in that at least two connecting ears are arranged on the bearing surface, at least two of the connecting ears are arranged on both sides of the air outlet side along the length direction of the bearing surface, and a connecting part is provided on each of the connecting ears, and the connecting part is used to connect with the air outlet grille covering the air outlet of the rear foot blowing air duct. The support structure according to any one of claims 1 to 3, characterized in that there are at least two second mounting portions, at least two second mounting portions are arranged at intervals along the circumference of the support body, at least two first mounting portions are arranged at intervals on the vehicle body floor, and one first mounting portion corresponds to one second mounting portion; And/or, the first mounting portion includes a first mounting hole, and the second mounting portion includes a second mounting hole matching the first mounting hole and a fastener penetrating the first mounting hole and the second mounting hole. The support structure according to any one of claims 1 to 3 is characterized in that the first clamping portion passes through the center line of the bearing surface in the length direction. A rear air duct assembly, characterized in that it comprises an air duct and a support structure as described in any one of claims 1 to 6, wherein the support structure is used to fix the air outlet side of the air duct to the bottom plate of the vehicle body. The rear air duct assembly according to claim 7 is characterized in that the first clamping portion includes a first clamping hole, and the second clamping portion includes a second clamping hole matching the first clamping hole and a clamping piece that penetrates and clamps in the first clamping hole and the second clamping hole. The rear exhaust air duct assembly according to claim 8, characterized in that the clamping member comprises a clamping rod and a clamping cap disposed on the top end of the clamping rod; The clamping rod is inserted into and clamped in the first clamping hole and the second clamping hole, and when the clamping rod is clamped in place with the first clamping hole and the second clamping hole, the clamping cap stops on the outer wall of the air outlet side away from the bearing surface. A rear air duct assembly, characterized in that it comprises an air duct, a supporting body and an air outlet grille; The support body is located below the air duct, and one end of the support body is fixedly connected to the air duct, and the other end of the support body is fixedly connected to the bottom plate of the vehicle body; The air outlet grille cover is arranged at the air outlet of the air duct, and the support body is provided with a first connection part, the air outlet grille is provided with a second connection part matching the first connection part, and the air outlet grille is connected to the support body through the first connection part and the second connection part; A receiving groove is provided on one side of the air outlet grille facing the air duct, so that when the carpet is fitted into the vehicle body bottom plate, the outer edge of the avoidance hole of the carpet matching the air outlet extends into the receiving groove. The rear air duct assembly according to claim 10 is characterized in that a stop convex portion is provided on a side of the air outlet grille facing the air duct, the stop convex portion is provided along the length direction of the air outlet grille and extends toward the support body, and the stop convex portion, the air outlet grille and the top wall of the air duct jointly enclose the accommodating groove; When the air outlet grille is connected to the supporting body in place, the outer edge of the avoidance hole extends into the accommodating groove and abuts against the stop convex portion. The rear air duct assembly according to claim 11 is characterized in that the stop protrusion is a stop plate arranged along the length direction of the air outlet grille. The rear exhaust air duct assembly according to claim 10 is characterized in that a first clamping portion is provided at the top end of the support body, a second clamping portion matching the first clamping portion is provided at the air outlet side of the air duct, and the air outlet side is connected to the support body through the first clamping portion and the second clamping portion. The rear air duct assembly according to claim 13 is characterized in that the first clamping portion includes a first clamping hole, and the second clamping portion includes a second clamping hole matching the first clamping hole and a clamping piece that penetrates and clamps in the first clamping hole and the second clamping hole. The rear exhaust air duct assembly according to claim 14, characterized in that the clamping member comprises a clamping rod and a clamping cap arranged on the top of the clamping rod; The clamping rod is inserted into and clamped in the first clamping hole and the second clamping hole, and the clamping cap is stopped on a surface of the air outlet side that is away from the supporting body. The rear air duct assembly according to claim 13, characterized in that the air outlet comprises a first outlet and a second outlet that are adjacent and spaced apart; The second clamping portion is disposed between the first outlet and the second outlet. The rear exhaust air duct assembly according to any one of claims 10 to 16 is characterized in that at least two second mounting holes are provided at the bottom end of the support body, at least two first mounting holes are arranged at intervals along the circumference of the support body, at least two first mounting holes are provided at intervals on the vehicle body floor, one first mounting hole corresponds to one second mounting hole, and the bottom end of the support body is connected to the vehicle body floor by fasteners passing through the first mounting holes and the second mounting holes. The rear exhaust air duct assembly according to any one of claims 10 to 16 is characterized in that there are at least two first connection parts, at least two of which are spaced apart along the length direction of the support body and disposed on both sides of the air outlet, and there are at least two second connection parts, one second connection part corresponds to one first connection part. The rear air duct assembly according to any one of claims 10 to 16 is characterized in that the first connecting portion is a slot, and the second connecting portion is a protrusion that can be inserted into the slot. The rear exhaust air duct assembly according to claim 19 is characterized in that a connecting ear is provided on the top of the supporting body, and the card slot is opened on the connecting ear. The rear air duct assembly according to claim 20 is characterized in that a reinforcing rib is provided on the side wall of the supporting body, the reinforcing rib extends in a direction from the air duct to the vehicle body floor, and the reinforcing rib is located directly below the connecting ear. A vehicle air-conditioning system, characterized in that it comprises an air-conditioning box and a rear air duct assembly as described in any one of claims 7 to 21, wherein an air inlet of the rear air duct assembly is connected to an air-conditioning outlet of the air-conditioning box. A vehicle, characterized by comprising at least one of the rear air duct assemblies according to any one of claims 7 to 21.