A hanging air duct structure and a vehicle ventilation system using the same

Abstract

The application discloses a hanging air duct structure and a vehicle ventilation system applying the same, and belongs to the field of rail transit. The hanging air duct structure comprises first and second air duct blocks which are respectively provided with air duct cavities and are in communication with each other, and are respectively fixed and hung on the top of a vehicle body and are respectively provided with bottom air outlets; wherein the first air duct block comprises a top, left and right side surfaces, an end surface air duct plate and a bottom air duct plate provided with the bottom air outlet and being integrally connected; a balance support provided with an air inlet is mounted on the side surface air duct plate; the balance support comprises a support body fixedly mounted on the left side surface air duct plate, and a frame body provided with the air inlet is mounted on the support body; a sealing rubber strip located at the periphery of the air inlet is embedded on the frame body, and sealing glue is used for sealing and curing; the support body further comprises a bevel support plate unit provided with the frame body. The application optimizes the spatial layout design of the top of the vehicle on the basis of ensuring high ventilation efficiency and superior ventilation comfort.

Description

[0001] This invention is a divisional application of a patent application entitled "A Suspended Air Duct Structure and Its Application in a Vehicle Ventilation System", the original application was filed on February 26, 2022, application number 202210181770.5. Technical Field

[0002] This invention belongs to the field of rail transit, specifically relating to a suspended air duct structure and its application in vehicle ventilation systems. Background Technology

[0003] As a crucial structure connecting the air vents of the air conditioning unit to the vehicle interior, the performance of the ductwork directly determines the ventilation efficiency and comfort inside the vehicle. At the same time, the ductwork structure is also constrained by the limited installation space. Conventional vehicle ventilation systems often use ductwork structures made of spliced ​​sheet metal, supported by internal and external brackets, occupying a large installation space and hindering vehicle space layout design. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a suspended air duct structure and its application in a vehicle ventilation system, which optimizes the spatial layout design of the vehicle roof while ensuring high ventilation efficiency and superior ventilation comfort.

[0005] The technical solution adopted in this invention is as follows.

[0006] On one hand, the present invention provides a suspended air duct structure, which includes at least a first air duct block and a second air duct block that are respectively provided with air duct cavities and are interconnected. The first air duct block and the second air duct block are independent components and are respectively fixedly suspended and installed on the top of the vehicle body, and are respectively provided with bottom air outlets. The first air duct block includes a first top air duct plate, a second top air duct plate, a first right side air duct plate, a second right side air duct plate, a bottom air duct plate with a bottom air outlet, a left side air duct plate, and an end air duct plate, all installed and connected as a single unit. A balance bracket with an air inlet is installed on the left side air duct plate. The air inlet is connected to the air outlet of the air conditioning unit and communicates with the inner cavity of the air duct. The balance bracket is fixedly installed on the top of the vehicle body. The balance bracket includes a bracket body fixedly installed on the left side air duct plate, a frame body on which the air inlet is installed, a sealing strip on the frame body located on the outer periphery of the air inlet, and a sealing adhesive for sealing and curing; at the same time, the upper end of the bracket body is fixedly connected to the top of the vehicle body. The bracket body also includes an inclined bracket plate unit on which the frame body is mounted. The lower end of the inclined bracket plate unit extends to the bottom and covers the bottom air duct plate, and the upper end extends to the top and covers the first top air duct plate. At the same time, it extends upward to form a bracket body mounting surface for riveting and fixing to the top of the vehicle body.

[0007] Optionally, the balance bracket further includes a horizontal support frame, which is installed on the first right side air duct plate and corresponds to the bracket body in the left-right direction. At the same time, the horizontal support frame is fixedly connected to the top of the vehicle body through a first external support member. The mounting surface of the bracket body is riveted to the side top of the vehicle by evenly distributed mounting rivets.

[0008] Optionally, the suspended air duct structure further includes a third air duct block that is installed and connected to the second air duct block, and the air duct cavity of the third air duct block is in communication with the air duct cavity of the second air duct block; A cross-sectional support is provided at the connection between each adjacent air duct block. The shape of the cross-sectional support corresponds to the shape of the end face of the air duct cavity where it is located, so that the transition surface between the adjacent air duct blocks forms the same angle. The cross-sectional support includes a first cross-sectional support connecting the first air duct block and the second air duct block, and a second cross-sectional support connecting the second air duct block and the third air duct block. Both the first cross-sectional support and the second cross-sectional support adopt a multi-faceted shape with one body on all four sides.

[0009] Optionally, the suspended air duct structure further includes a junction box installed at the bottom, the junction box extending along the length of the corresponding air duct block and located on the outer periphery of the corresponding bottom air outlet; the junction box includes a first junction box connecting the first air duct block and the second air duct block, and a third junction box connecting the second air duct block and the third air duct block.

[0010] Optionally, the second air duct block is structurally reinforced by a central support and / or an internal connecting support and / or an external connecting support; the central support is located in the middle of the interior of the second air duct block; The third air duct block is structurally reinforced using internal connecting brackets and / or external connecting brackets and / or internal corner supports.

[0011] Optionally, the first air duct block is provided with a support system for structural reinforcement, the support system including an outer corner support located outside the air duct cavity and an inner corner support located inside the air duct cavity; The outer corner support is fixed to the second top air duct plate, the first right side air duct plate, the second right side air duct plate and the bottom air duct plate by means of shims and rivets; The inner corner support is located at the internal connection between each air duct plate, and the installation connection between the inner corner support and its corresponding air duct plate is realized through the inner corner support.

[0012] Optionally, the support system further includes an inner partition support member located within the inner cavity of the air duct. The inner partition support member is an arc-shaped inner partition support member, including a first arc-shaped inner partition support member, a second arc-shaped inner partition support member, and a third arc-shaped inner partition support member. Each arc-shaped inner partition support is distributed in parallel at intervals, extending upward from the bottom air duct plate to the first top air duct plate; the bottom of each arc-shaped inner partition support is fixedly installed on the bottom air duct plate, and its top is fixedly installed on the first top air duct plate. At the same time, each arc-shaped inner partition support extends along one side of the bottom air outlet to the other side.

[0013] Optionally, the upper end of the support body is further provided with a number of triangular stiffeners for structural reinforcement; the support body, frame body and triangular stiffeners are formed into a reinforced structure by welding and riveting.

[0014] Optionally, the installation and connection between the air duct plates in the first and second air duct blocks, as well as the fixed installation and connection between the balance bracket and the top of the vehicle body, are mainly carried out by riveting and / or welding; each air duct plate is provided with multiple rivet connection through holes.

[0015] On the other hand, the present invention also provides a vehicle ventilation system, including an air conditioning unit and a duct structure, wherein the duct structure adopts the suspended duct structure as described above.

[0016] Based on the above technical solution, the present invention achieves the following beneficial technical effects: This invention suspends the air duct block of the air duct structure on the top of the vehicle body, and fixes the balance bracket with air outlet directly to the side top of the vehicle. While ensuring high ventilation efficiency and superior ventilation comfort, it optimizes the spatial layout design of the vehicle top, making full use of the space on the vehicle top, making the roof aesthetically pleasing and unobtrusive, and meeting the mechanical performance and lifespan requirements of vehicle equipment layout and rail transit environment. Attached Figure Description

[0017] Figure 1 This is an overall schematic diagram of the suspended air duct structure according to a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the side structure of the suspended air duct structure installed on the top of the vehicle body according to a specific embodiment of the present invention; Figure 3 This is an exploded structural diagram of the first air duct block in a specific embodiment of the present invention; Figure 4 This is a schematic diagram of the lower end face air duct plate according to a specific embodiment of the present invention; Figure 5 This is a structural schematic diagram of the outer corner support member according to a specific embodiment of the present invention; wherein, Figure 5 Part (a) is the front view of the outer corner support. Figure 5 Part (b) is a side view of the outer corner support. Figure 5 Part (c) is a top view of the outer corner support; Figure 6 This is a schematic diagram of the structure of each arc-shaped inner partition support member according to a specific embodiment of the present invention, wherein, Figure 6 Part (a) is a schematic diagram of the structure of the first arc-shaped inner diaphragm support. Figure 6 Part (b) is a schematic diagram of the structure of the second arc-shaped inner diaphragm support. Figure 6 Part (c) is a schematic diagram of the structure of the third arc-shaped inner diaphragm support; Figure 7 This is a schematic diagram of the installation structure of the bracket body under a specific embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the first external support member in a specific embodiment of the present invention; Figure 9 This is an exploded structural diagram of the second air duct block according to a specific embodiment of the present invention; Figure 10 This is a schematic diagram of the exploded structure of the third air duct block in a specific embodiment of the present invention; Figure 11 This is a top view of the first section of the support structure in a specific embodiment of the present invention; Figure 12 This is a side view of the second section support in a specific embodiment of the present invention. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solutions of this invention, the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0019] Example 1 This embodiment discloses a suspended air duct structure, comprising at least a first air duct block and a second air duct block, each having an internal air duct cavity and communicating with each other. The first and second air duct blocks are respectively fixedly suspended and installed on the top of the vehicle body and each has a bottom air outlet. The first air duct block includes a top air duct plate, a left side air duct plate, a right side air duct plate, an end air duct plate, and a bottom air duct plate with a bottom air outlet, all integrally connected. A balance bracket with an air inlet is installed on the side air duct plate. The air inlet is connected to the air outlet of the air conditioning unit and communicates with the internal air duct cavity, and the balance bracket is fixedly installed on the top of the vehicle body.

[0020] Preferably, the balance bracket includes a bracket body fixedly installed on one of the side air duct plates, a frame body with an air inlet installed on the bracket body, a sealing strip located on the outer periphery of the air inlet embedded in the frame body, and sealed and cured with sealant; at the same time, the upper end of the bracket body is fixedly connected to the top of the vehicle body.

[0021] Preferably, the side air duct plate corresponding to the mounting bracket body is inclined; wherein, the bracket body includes an inclined bracket plate unit on which a frame body is mounted, the lower end of the inclined bracket plate unit extends to the bottom covering part of the bottom air duct plate, the upper end extends to the top covering part of the top air duct plate, and extends upward to form a bracket body mounting surface for riveting and fixing to the top of the vehicle body.

[0022] Preferably, the balance bracket further includes a horizontal support frame, which is installed on another side air duct plate and corresponds to the bracket body in the left-right direction; at the same time, the horizontal support frame is fixedly connected to the top of the vehicle body through a first external support member; and / or, the second air duct block is fixedly connected to the top of the vehicle body through a second external support member.

[0023] Preferably, a cross-sectional support is provided at the connection between each adjacent air duct block, and the shape of the cross-sectional support corresponds to the shape of the end face of the air duct cavity where it is located, so that the transition surface between the adjacent air duct blocks forms the same angle.

[0024] Preferably, the suspended air duct structure includes a junction box installed at the bottom of the first air duct block and / or the bottom of the second air duct block. The junction box extends along the length of the corresponding air duct block and is located on the outer periphery of the corresponding bottom air outlet.

[0025] Preferably, the first air duct block is provided with a support system for structural reinforcement, wherein the support system includes at least one outer corner support located outside the air duct cavity and / or at least one inner corner support located inside the air duct cavity, and / or at least one inner partition support located inside the air duct cavity.

[0026] Preferably, the support system includes a plurality of arc-shaped inner partition support members distributed in parallel at intervals, wherein each arc-shaped inner partition support member extends upward from the bottom air duct plate to the top air duct plate.

[0027] Preferably, the suspended air duct structure further includes a third air duct block installed and connected to the second air duct block, the air duct cavity of the third air duct block communicating with the air duct cavity of the second air duct block; wherein, the second air duct block includes several air duct plates installed and connected as one unit, and is reinforced by a central support and / or an internal connecting support and / or an external connecting support; the third air duct block includes several air duct plates installed and connected as one unit, and is reinforced by an internal connecting support and / or an external connecting support and / or an internal corner support.

[0028] Example 2 See Figure 1 The illustrated suspended air duct structure includes a first air duct block 1a, a second air duct block 1b, and a third air duct block 1c, each having an internal air duct cavity and interconnected with each other. In other embodiments, more air duct blocks may be provided depending on the specific layout requirements; of course, two air duct blocks may also be used. This embodiment does not limit this to a single configuration. The first air duct block 1a, the second air duct block 1b, and the third air duct block 1c are respectively fixedly suspended and mounted on the top of the vehicle body and each has a bottom air outlet. Preferably, in this embodiment, the length of the second air duct block 1b is greater than the length of the first air duct block 1a and the length of the third air duct block 1c.

[0029] In this embodiment, see further details. Figure 2 and Figure 3 As shown, the first air duct block 1a includes a first top air duct plate 1a11, a second top air duct plate 1a12, a first right side air duct plate 1a13, a second right side air duct plate 1a17, a bottom air duct plate 1a15 with a bottom air outlet 1a4, a left side air duct plate 1a16, and an end air duct plate 1a14, all installed and connected as a single unit. The air outlet 1a4 has the following air outlet direction: Figure 2 As indicated by the arrow. Preferably, each air duct plate is flat and interconnected to form the inner cavity of the air duct. Each air duct plate also has multiple rivet connection through holes.

[0030] Preferably, in order to facilitate installation and reduce air supply resistance, in this embodiment, the left side air duct plate 1a16, the second top air duct plate 1a12, and the second right side air duct plate 1a17 are all installed at an angle.

[0031] To improve airflow, in this embodiment, the bottom air outlet 1a4 is preferably distributed along the length of the vehicle body and is consistent with the length of the side air duct plate, specifically in a rectangular shape and intermittent.

[0032] See further Figure 4 As shown, specifically and preferably, in this embodiment, the perimeter of the end-face air duct plate 1a14 is polygonal, and its dimensions are as follows: L 11 =468mm, L 12 =165mm, L 13 =105mm, L 14 =171mm, L 15 =279mm, angular dimension is a 11 =108°, a 12 =135°, a 13 =45°.

[0033] See further Figure 3 As shown, preferably, in this embodiment, the first air duct block 1a is provided with a support system for structural reinforcement, wherein the support system includes: one outer corner support 1a21 located outside the air duct cavity, several inner corner supports 1a25 located inside the air duct cavity, and three inner partition supports located inside the air duct cavity.

[0034] See further Figure 5 and combined Figure 3 As shown, preferably, each surface of the outer corner support 1a21 has a rivet through hole 1a27, and the second top air duct plate 1a12, the first right side air duct plate 1a13, the second right side air duct plate 1a17, and the bottom air duct plate 1a15 are riveted and fixed by washers 1a26 to form a stable local installation structure. The resulting height direction angle α 21 =108°, angle a in the length direction 22 =170°, height dimension H 1a21 =198mm.

[0035] See Figure 3 As shown, preferably, each face of each inner corner support 1a25 has a rivet through hole, and is located at the internal connection between each air duct plate, so that the installation connection between the inner corner support 1a25 and its corresponding air duct plate can be realized.

[0036] Preferably, to further increase installation strength, each inner partition support member is an arc-shaped inner partition support member. See also Figure 3As shown, there are three internal partition supports located within the air duct cavity: a first arc-shaped internal partition support 1a22, a second arc-shaped internal partition support 1a23, and a third arc-shaped internal partition support 1a24. These arc-shaped internal partition supports are arranged in parallel at intervals, extending upwards from the bottom air duct plate to the first top air duct plate 1a11. More preferably, the bottom of each arc-shaped internal partition support is fixedly installed on the bottom air duct plate 1a15, and its top is fixedly installed on the first top air duct plate 1a11. Simultaneously, each arc-shaped internal partition support extends along one side of the bottom air outlet 1a4 to the other side.

[0037] Specifically, see further preferred embodiments. Figure 6 As shown, in this embodiment, the dimensions of the first arc-shaped inner support 1a22 are: H 21 =20mm, arc length L 21 =184mm, radius R 21 =1000mm, arc length L 22 = 425mm, radius R 22 =270mm, other dimensions are generated according to the shape. The dimensions of the second arc-shaped inner support 1a23 are: H 31 =22mm, arc length L 31 =270mm, radius R 31 =170mm, other dimensions are generated according to the shape. The dimensions of the third arc-shaped inner support 1a24 are: H 41 =25mm, arc length L 41 =110mm, radius R 41 =70mm, other dimensions are generated according to the shape.

[0038] Further refer to Figure 2 , Figure 3 and Figure 7 As shown, in this embodiment, a balance bracket for an air inlet 1a5 is installed on the left side air duct plate 1a16, and the balance bracket is fixedly installed on the top of the vehicle body. The air inlet 1a5 is installed and connected to the air outlet of the air conditioning unit (not shown in the figure) and communicates with the inner cavity of the air duct, and its air intake direction is as follows. Figure 2 As indicated by the arrow.

[0039] More preferably, in this embodiment, the balance bracket includes a bracket body 1a31 fixedly mounted on the left side air duct plate 1a16, and a frame body 1a32 with an air inlet 1a5 mounted on the bracket body 1a31. A sealing strip located on the outer periphery of the air inlet 1a5 is embedded in the frame body 1a32 and sealed and cured using sealant and / or tape. The sealing strip can specifically adopt a compressible elastic structure, such as an air strip 1a33. At the same time, the upper end of the bracket body 1a31 is fixedly connected to the top of the vehicle body, thereby forming an air outlet 1a5 structure that achieves the main balance connection and elastic compression effect between the first air duct block 1a and the narrow space of the vehicle body.

[0040] To ensure structural strength and facilitate mechanical balance, preferably in this embodiment, the bracket body 1a31 includes an inclined bracket plate unit 1a31a on which a frame body 1a32 is mounted. The lower end of the inclined bracket plate unit 1a31a extends to the bottom covering portion bottom air duct plate 1a15, and its upper end extends to the top covering portion first top air duct plate 1a11, while extending upward to form a bracket body mounting surface 1a31b for riveting and fixing to the top of the vehicle body.

[0041] More preferably, see Figure 7 As shown, in this embodiment, the upper end of the support body 1a31 is further provided with several triangular stiffeners 1a31c for structural reinforcement. The support body 1a31, frame 1a32, and triangular stiffeners 1a31c form a reinforced structure through welding and riveting. The support body 1a31 adopts a thin, multi-faceted structure with dimensions of H... 1a1 =50mm, L 1a1 =30mm, L 1a2 =286mm, L 1a3 =49mm, H 1a2 =17mm, L 1a4 =72mm, a 1a1 =135°, air outlet size is L 1a5 =135mm.

[0042] Preferably, the balance bracket further includes a horizontal support frame 1a34, which is mounted on the first right side air duct plate 1a13 and corresponds to the bracket body 1a31 in the left-right direction. The horizontal support frame 1a34 is also fixedly connected to the top 4 of the vehicle body via a first outer support member 2c. More preferably, in this embodiment, the mounting surface 1a31b of the bracket body is riveted to the side top 4a of the vehicle using three evenly distributed mounting rivets 1a31d.

[0043] See further Figure 8As shown, preferably, the dimensions of the first outer support member 2c are: L 51 =89mm, H 51 =47mm, L 52 =74mm, H 52 =20mm, L 53 =72mm, a 31 =111°.

[0044] Preferably, see further. Figure 1 and Figure 9 As shown, in this embodiment, the second air duct block 1b is located between the first air duct block 1a and the third air duct block 1c, and is specifically composed of a top middle air duct plate 1b1, a right middle right side air duct plate 1b2, a bottom middle air duct plate 1b3, and a left middle left side air duct plate 1b4, all installed and connected as a single unit. The bottom middle air duct plate 1b3 is located at the bottom of the second air duct block 1b and has an intermittent bottom air outlet 1b8, which is specifically rectangular in shape. Simultaneously, the second air duct block 1b is structurally reinforced using a central support 1b5 and / or an internal connecting support 1b6 and / or an external connecting support 1b7. Preferably, in this embodiment, the central support 1b5 is located in the middle of the interior of the second air duct block 1b, and connects the air duct plates of the second air duct block 1b with rivets and washers 1a26, thereby improving the overall rigidity of the second air duct block 1b. The internal connecting bracket 1b6 and the external connecting bracket 1b7 are connected to the middle right side air duct plate 1b2 by rivets. At the same time, the internal connecting bracket 1b6 is connected to the middle bottom air duct plate 1b3 by rivets and gaskets 1a26, forming a stable local structure of the second air duct block 1b.

[0045] Preferably, see further. Figure 1 and Figure 10 As shown, in this embodiment, the third air duct block 1c is located at the rear end of the entire air duct structure, specifically composed of a rear top air duct plate 1c1, a rear right side air duct plate 1c2, a rear bottom air duct plate 1c3, a rear left side air duct plate 1c4, and a rear end air duct plate 1c5. The rear bottom air duct plate 1c3 is located at the bottom of the third air duct block 1c and has an intermittent bottom air outlet 1c6, which is rectangular in shape. Simultaneously, the third air duct block 1c is structurally reinforced using an internal connecting bracket 1b6 and / or an external connecting bracket 1b7 and / or an inner corner support 1a25; the inner corner support 1a25 can have the same structure as the inner corner support of the first air duct block 1a. Preferably, in this embodiment, the internal connecting bracket 1b6 and the external connecting bracket 1b7 are connected to the right side air duct plate 1c2 by rivets, and the internal connecting bracket 1b6 is connected to the bottom air duct plate 1c3 by rivets and gaskets 1a26, forming a stable local structure of the third air duct block 1c.

[0046] More preferably, see Figure 1In this embodiment, the second air duct block 1b and the third air duct block 1c are respectively fixedly connected to the top of the vehicle body via second external support members 2d. Specifically, preferably, the second air duct block 1b is fixedly connected to the top of the vehicle body via two second external support members 2d that are spaced apart; the third air duct block 1c is fixedly connected to the top of the vehicle body via a single second external support member 2d. This embodiment forms a mechanical support structure through the first external support member 2c and the three second external support members 2d, which has the function of jointly adjusting the installation position of the air duct structure, thereby eliminating the installation problem caused by vehicle manufacturing deformation and accumulated errors.

[0047] Preferably, in this embodiment, a cross-sectional support is provided at the connection between each adjacent air duct block. The shape of the cross-sectional support corresponds to the shape of the end face of its location within the air duct cavity, ensuring that the transition surfaces between adjacent air duct blocks form the same angle. For more specific and preferred embodiments, see [link to preferred embodiments]. Figure 1 As shown, in this embodiment, the cross-sectional support specifically includes a first cross-sectional support 2a and a second cross-sectional support 2b. The first cross-sectional support 2a connects the first air duct block 1a and the second air duct block 1b, and the second cross-sectional support 2b connects the second air duct block 1b and the third air duct block 1c. See further details. Figure 11 and Figure 12 As shown, specifically and preferably, in this embodiment, the first section support 2a adopts a multi-faceted shape with all four sides being one piece (corresponding to the end face shape of its location within the air duct cavity), ensuring that the transition surfaces between the interconnected first air duct block 1a and second air duct block 1b have consistent angles. Its specific dimensions are: rear angle a 41 =170°, angle a of the top surface outward 42 =2°, bottom dimension L 61 =360mm. The second section support 2b adopts a multi-faceted shape with one surface on all four sides (corresponding to the end face shape of its location in the air duct cavity), ensuring that the transition surfaces between the interconnected second air duct block 1b and third air duct block 1c have consistent angles. Its specific dimensions are: top surface angle a 43 =88°, height dimension H 61 = 112mm.

[0048] Preferably, in this embodiment, the suspended air duct structure includes an adapter box installed at the bottom, serving as an external module for forming the main structure of the air duct block. For specific preferred embodiments, see [link to preferred embodiments]. Figure 1As shown, this embodiment includes a first adapter box 3a, a second adapter box 3b, and a third adapter box 3c. Each adapter box 3a, 3b, and 3c extends along the length of its corresponding air duct block and is located on the outer periphery of its corresponding bottom air outlet. The first adapter box 3a connects the first air duct block 1a and the second air duct block 1b, and the third adapter box 3c connects the second air duct block 1b and the third air duct block 1c. Through the combined action with the aforementioned support components, the overall installation performance of the air duct structure is made more stable and reliable. More specifically, in this embodiment, the inner diameter of the first adapter box 3a is 1092 mm, the inner diameter of the second adapter box 3b is 1508 mm, and the inner diameter of the third adapter box 3c is 1212 mm. The inner width of each adapter box 3a, 3b, and 3c is 100 mm, and the inner height is 50 mm.

[0049] It should be noted that the installation connection involved in this invention is mainly carried out by riveting and / or welding, which is convenient to install and effectively saves installation space; the air duct plates involved are all made of known composite plates and can be directly purchased from the market.

[0050] Example 3 Preferably, this embodiment also proposes a vehicle ventilation system, including an air conditioning unit and a duct structure, wherein the duct structure adopts the suspended duct structure described above in this embodiment. This embodiment is particularly suitable for application in the field of monorail vehicles, ensuring high ventilation efficiency and superior ventilation comfort while further making full use of the space on the vehicle roof, resulting in an aesthetically pleasing and unobtrusive roof, and meeting the mechanical performance and lifespan requirements of vehicle equipment layout and rail transit environment.

[0051] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. For example, specific size specifications can be selected according to actual installation layout needs, and this embodiment is not the only one. Therefore, the embodiments should be considered as exemplary and non-limiting in all respects. The scope of the invention is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment includes only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A suspended air duct structure, characterized in that, It includes at least a first air duct block and a second air duct block, which are respectively provided with air duct cavities and are interconnected. The first air duct block and the second air duct block are independent components and are respectively fixedly suspended and installed on the top of the vehicle body, and are respectively provided with bottom air outlets. The first air duct block includes a first top air duct plate, a second top air duct plate, a first right side air duct plate, a second right side air duct plate, a bottom air duct plate with a bottom air outlet, a left side air duct plate, and an end air duct plate, all installed and connected as a single unit. A balance bracket with an air inlet is installed on the left side air duct plate. The air inlet is connected to the air outlet of the air conditioning unit and communicates with the inner cavity of the air duct. The balance bracket is fixedly installed on the top of the vehicle body. The balance bracket includes a bracket body fixedly installed on the left side air duct plate, a frame body on which the air inlet is installed, a sealing strip on the frame body located on the outer periphery of the air inlet, and a sealing adhesive for sealing and curing; at the same time, the upper end of the bracket body is fixedly connected to the top of the vehicle body. The bracket body also includes an inclined bracket plate unit on which the frame body is mounted. The lower end of the inclined bracket plate unit extends to the bottom and covers the bottom air duct plate, and the upper end extends to the top and covers the first top air duct plate. At the same time, it extends upward to form a bracket body mounting surface for riveting and fixing to the top of the vehicle body.

2. The suspended air duct structure according to claim 1, characterized in that, The balance bracket also includes a horizontal support frame, which is installed on the first right side air duct plate and corresponds to the bracket body in the left-right direction. At the same time, the horizontal support frame is fixedly connected to the top of the vehicle body through a first external support member. The mounting surface of the bracket body is riveted to the side top of the vehicle by evenly distributed mounting rivets.

3. The suspended air duct structure according to claim 1, characterized in that, It also includes a third air duct block that is installed and connected to the second air duct block, wherein the air duct cavity of the third air duct block is connected to the air duct cavity of the second air duct block; A cross-sectional support is provided at the connection between each adjacent air duct block. The shape of the cross-sectional support corresponds to the shape of the end face of the air duct cavity where it is located, so that the transition surface between the adjacent air duct blocks forms the same angle. The cross-sectional support includes a first cross-sectional support connecting the first air duct block and the second air duct block, and a second cross-sectional support connecting the second air duct block and the third air duct block. Both the first cross-sectional support and the second cross-sectional support adopt a multi-faceted shape with one body on all four sides.

4. The suspended air duct structure according to claim 3, characterized in that, It also includes an adapter box installed at the bottom, the adapter box extending along the length of its corresponding air duct block and located on the outer periphery of its corresponding bottom air outlet; the adapter box includes a first adapter box connecting the first air duct block and the second air duct block, and a third adapter box connecting the second air duct block and the third air duct block.

5. The suspended air duct structure according to claim 3, characterized in that, The second air duct block is structurally reinforced using a central support and / or internal connecting supports and / or external connecting supports; the central support is located in the middle of the interior of the second air duct block; The third air duct block is structurally reinforced using internal connecting brackets and / or external connecting brackets and / or internal corner supports.

6. The suspended air duct structure according to claim 1, characterized in that, The first air duct block is provided with a support system for structural reinforcement, the support system including an outer corner support located outside the air duct cavity and an inner corner support located inside the air duct cavity; The outer corner support is fixed to the second top air duct plate, the first right side air duct plate, the second right side air duct plate and the bottom air duct plate by means of shims and rivets; The inner corner support is located at the internal connection between each air duct plate, and the installation connection between the inner corner support and its corresponding air duct plate is realized through the inner corner support.

7. The suspended air duct structure according to claim 6, characterized in that, The support system also includes an inner partition support member located inside the air duct cavity. The inner partition support member is an arc-shaped inner partition support member, including a first arc-shaped inner partition support member, a second arc-shaped inner partition support member, and a third arc-shaped inner partition support member. Each arc-shaped inner partition support is distributed in parallel at intervals, extending upward from the bottom air duct plate to the first top air duct plate; the bottom of each arc-shaped inner partition support is fixedly installed on the bottom air duct plate, and its top is fixedly installed on the first top air duct plate. At the same time, each arc-shaped inner partition support extends along one side of the bottom air outlet to the other side.

8. The suspended air duct structure according to claim 1, characterized in that, The upper end of the support body is also provided with several triangular stiffeners for structural reinforcement; the support body, frame body and triangular stiffeners are formed into a reinforced structure by welding and riveting.

9. The suspended air duct structure according to claim 1, characterized in that, The installation and connection between the air duct plates in the first and second air duct blocks, as well as the fixed installation and connection between the balance bracket and the top of the vehicle body, are mainly carried out by riveting and / or welding; each air duct plate is provided with multiple rivet connection through holes.

10. A vehicle ventilation system, comprising an air conditioning unit and an air duct structure, characterized in that, The air duct structure adopts the suspended air duct structure as described in any one of claims 1-9.

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