Large-span aluminum-clad steel curtain wall system

By using an integrated inverted U-shaped aluminum panel and rubber pads on the steel columns, the problem of warping and detachment caused by steel column deformation has been solved, thus improving construction efficiency and visual effect.

CN224119761UActive Publication Date: 2026-04-14SHANGHAI JINGUAN CURTAIN WALL TECH CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI JINGUAN CURTAIN WALL TECH CO LTD
Filing Date
2024-12-30
Publication Date
2026-04-14

AI Technical Summary

Technical Problem

The existing segmented aluminum profiles used to encase steel columns are difficult to control during construction, leading to warping and detachment. Moreover, the construction cost is high and it is difficult to meet the requirements of building facades.

Method used

The first and second outer aluminum panels, which adopt an integrated inverted U-shaped structure, are combined with rubber pads and pressure plates and fixed to the columns and beams with locking screws to form an integrated aluminum-clad steel curtain wall system, which absorbs the deformation of the steel columns and improves the installation accuracy.

Benefits of technology

It achieves perfect absorption of steel column deformation, reduces construction costs, improves construction efficiency and visual effect, and ensures facade transparency and overall flatness.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224119761U_ABST
    Figure CN224119761U_ABST
Patent Text Reader

Abstract

The utility model provides a large span aluminium clad steel curtain wall system, including stand column unit, crossbeam unit, glass unit, first cladding aluminium veneer and second cladding aluminium veneer, wherein: the cross section of the first cladding aluminium veneer and the second cladding aluminium veneer are all in an integrated inverted U-shaped structure, respectively cladding the stand column unit and crossbeam unit, and the glass unit is provided with the glass unit and the first cladding aluminium veneer and the second cladding aluminium veneer respectively cladding the stand column unit and crossbeam unit. The inner side opening ends are fixedly installed on the outer side walls of the stand column unit and the cross beam unit respectively. According to the utility model, the whole aluminum veneer is wrapped outside the upright post unit, so that the deformation generated by the steel upright post in a large-span system can be perfectly absorbed, the finished indoor upright post is good in integrality and flatness, and the section modeling meets the requirements of architects; and the construction time is shorter, the construction is more convenient and faster, and the optimal functionality, economical efficiency and appearance effect are achieved at the same time.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, and in particular to a large-span aluminum-clad steel curtain wall system. Background Technology

[0002] Currently, many office buildings, hotels, and shopping malls often have high ceilings on the first floor to enhance the building's quality and highlight the grandeur of the lobby. The height of a single floor is usually around 6-10 meters. Some architects also have design requirements for the interior columns. Conventional curtain wall systems use steel columns clad with aluminum profiles to meet the requirements for strength and facade effect. Due to the relatively high floor height, the steel columns, as the main load-bearing components, will deform during processing and installation, generally by 8-10mm front and back and 15-20mm left and right. When the cross-section of the aluminum profile cladding the steel column is large, the cost of mold making will be relatively high, and the thickness of the profile will also be relatively thick.

[0003] The common practice is to divide the aluminum profile cladding around the steel column into two or three sections, such as... Figure 1 As shown, the aluminum profile 400' covering the outside of the steel column 100' is composed of a first aluminum panel 401' and a second aluminum panel 402' spliced ​​together, and fixed to the steel column 100' with screws 403' respectively. However, in the actual construction process, the deformation requirements of the steel column 100' are very high. If the deformation of the aluminum profile 400' is well controlled, the cost will increase significantly. In addition, since it is difficult to achieve uniform deformation of the profile and steel when the profile is divided into two or three sections, the rear section of the profile is prone to warping and jumping during construction and subsequent use. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a large-span aluminum-clad steel curtain wall system that can perfectly absorb the deformation of steel columns, meet the requirements of building facades, and has a shorter construction time and is more convenient and faster, in order to address the technical defects of existing segmented aluminum profiles for steel columns.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution:

[0006] A large-span aluminum-clad steel curtain wall system includes column units, beam units, glass units, a first outer aluminum panel, and a second outer aluminum panel, wherein: the cross-section of the first outer aluminum panel and the second outer aluminum panel is an integral inverted U-shaped structure, respectively covering the column unit and the beam unit, and their inner open ends are respectively fixedly installed on the outer walls of the column unit and the beam unit.

[0007] Preferably, the column unit comprises a steel column and a U-shaped channel steel, wherein:

[0008] The U-shaped channel steel consists of several groups, with two in each group, which are symmetrically installed on the inner and outer walls of the steel column, and the U-shaped channel steel in each group is arranged at intervals along the length of the steel column.

[0009] Preferably, a plurality of first rubber pads are provided at intervals between the column unit and the first outer aluminum cladding panel covering its exterior.

[0010] Preferably, a first pressure plate is provided between the outer wall of the column unit and the two glass units on its outer side, wherein:

[0011] The first pressure plate has a T-shaped structure, and its middle part is fixedly connected to the corresponding U-shaped channel steel by two first locking screws arranged at intervals on the left and right.

[0012] The outer end faces of the left and right ends of the first pressure plate are respectively fixedly connected to the two folded edges of the opening end of the first outer aluminum cladding plate using second locking screws; and

[0013] The middle part of the first pressure plate is fixedly connected to the outer decorative strip unit via the third locking screw, the first limiting sleeve, and the second limiting sleeve.

[0014] Preferably, the outer side wall of the first pressure plate is provided with a decorative strip connecting groove protruding outward in the middle, and the two ends are respectively provided with limiting stops bending inward, and the outer side walls of the two ends are respectively provided with aluminum single-panel locking grooves protruding outward.

[0015] Preferably, the beam unit includes a square tube beam, a second pressure plate, and a sub-frame connector, wherein:

[0016] One end of the square tube beam is welded to the column unit through a sleeve core, and a number of second rubber pads are spaced apart between it and the second outer aluminum single plate covering the outside, and the second pressure plate is provided on its outer wall.

[0017] The second pressure plate has a T-shaped structure. Its middle part is fixedly installed on the square tube beam by the fourth locking screw, and the upper and lower ends are respectively pressed on the two folded edges of the opening end of the second outer aluminum single panel by the sub-frame connector.

[0018] Preferably, the two folded edges at the open end of the first outer aluminum panel are respectively fixed to the first pressure plate using second locking screws;

[0019] The inner sidewalls of the two folded edges at the open end of the first outer aluminum panel are connected to the first pressure plate via a third rubber pad located inside the second locking screw; and

[0020] The outer walls of the two folded edges at the open end of the first outer aluminum panel are connected to the outer glass unit via a fourth rubber pad and a first sealing strip.

[0021] Preferably, L-shaped connecting plates are fixedly installed at the two open ends of the second outer aluminum single panel. The L-shaped connecting plates are fixedly installed on the outer wall of the beam unit by the fifth locking screw, and their outer walls are abutted and connected to the sub-frame connector on the beam unit.

[0022] Preferably, the large-span aluminum-clad steel curtain wall system further includes an outer decorative strip unit disposed at the connection between two adjacent glass units, wherein the outer decorative strip unit includes a third pressure plate and a decorative strip, wherein:

[0023] The third pressure plate component has an overall π-shaped structure, and its middle part is fixedly connected to the second limiting sleeve on the outer wall of the column unit by the first locking bolt;

[0024] The decorative strip has a convex shape, with its inner end embedded in the outer groove of the third pressure plate and locked in place by the second locking bolt.

[0025] More preferably, the exterior decorative strip unit further includes a second sealing strip and a side buckle cover plate, wherein:

[0026] The second sealing strip consists of two strips, which are respectively snapped onto the inner sidewalls at both ends of the third pressure plate and the corresponding glass units;

[0027] There are two side-fastening covers, which are respectively snapped into the slots on both sides of the third pressure plate, and their outer surfaces are flush with the outer surface of the outer decorative strip unit.

[0028] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0029] (1) This large-span aluminum-clad steel curtain wall system can solve the deformation caused when steel columns are used as the main load-bearing components in large-span floors. It can make the completed columns perfectly reflect the architect's requirements, thereby achieving the best visual effect in the interior and making the facade more transparent.

[0030] (2) The aluminum-clad steel curtain wall system has a simple and quick installation of aluminum panels and good overall flatness, thereby reducing project costs and improving the efficiency of processing and installation.

[0031] (3) The large-span aluminum-clad steel curtain wall system uses stainless steel machine screws + core sleeves to fix the horizontal beams, with small connection gaps, high precision, and strong anti-torsion ability of the horizontal beams. Attached Figure Description

[0032] Figure 1This is a schematic diagram of the cross-sectional structure of an existing two-section steel column with an aluminum profile cladding.

[0033] Figure 2 This is a cross-sectional structural diagram of a large-span aluminum-clad steel curtain wall system according to the present invention.

[0034] Figure 3 This utility model Figure 2 The diagram shows a partially enlarged structural schematic of part A in a large-span aluminum-clad steel curtain wall system.

[0035] Figure 4 This utility model Figure 2 The diagram shows a partially enlarged structural schematic of part B in a large-span aluminum-clad steel curtain wall system.

[0036] Figure 5 This is a longitudinal section diagram of a large-span aluminum-clad steel curtain wall system according to this utility model.

[0037] Figure 6 This utility model Figure 5 The diagram shows a partially enlarged structural schematic of section C in a large-span aluminum-clad steel curtain wall system. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0039] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0040] In some embodiments, such as Figure 2 and Figure 5 As shown, a large-span aluminum-clad steel curtain wall system is provided. This system mainly includes column units 100, beam units 200, glass units 300, a first outer aluminum cladding panel 400, and a second outer aluminum cladding panel 500. The first and second outer aluminum cladding panels 400 and 500 both have an integral inverted U-shaped cross-section, respectively covering the column unit 100 and beam unit 200, with their inner open ends fixedly installed on the outer walls of the column unit 100 and beam unit 200. This system can perfectly absorb the deformation of the steel columns, the shape of the outer aluminum cladding panels meets the requirements of the building facade, and the construction time is shorter, more convenient, and faster.

[0041] As mentioned above, to address the issues of high deformation requirements and easy warping and detachment during use inherent in existing segmented aluminum profile cladding solutions for steel columns, this system utilizes two integral 3mm aluminum panels, the first cladding aluminum panel 400 and the second cladding aluminum panel 500, both with an integral inverted U-shaped cross-section. This system, employing 3mm aluminum panels to clad the column unit 100, perfectly absorbs the deformation generated by the steel columns in large-span systems. This results in well-integrated interior columns with excellent flatness and cross-sectional shapes that meet architect requirements. Furthermore, the diverse surface treatments of the aluminum panels enhance both indoor and outdoor visual appeal, improving the overall quality of the lobby and achieving optimal functionality, economy, and aesthetics.

[0042] In some of them, such as Figure 2 and Figure 3 As shown, the column unit 100 is a steel column structure, mainly composed of steel columns 101 and U-shaped channel steel 102. The steel columns 101 are made of galvanized steel, and the U-shaped channel steel 102 is made of galvanized U-shaped steel. The U-shaped channel steel 102 consists of several groups, with two in each group, symmetrically installed on the inner and outer walls of the steel columns 101, and the U-shaped channel steel 102 in each group are spaced apart along the length of the steel columns 101.

[0043] The column unit 100 is connected to the first outer aluminum cladding panel 400 by U-shaped channel steel 102 on its inner and outer walls. A plurality of first rubber pads 103 are spaced apart between the column unit 100 and the first outer aluminum cladding panel 400. The first rubber pads 103 are made of rubber and have good cushioning elasticity, enabling them to effectively cover the first outer aluminum cladding panel 400 onto the column unit 100.

[0044] like Figure 2 and Figure 3 As shown, to achieve the external installation of the first outer aluminum panel 400 on the column unit 100, a first pressure plate 104 is provided between the outer side wall of the column unit 100 and the two glass units 300 on its outer side. The first pressure plate 104 is made of aluminum alloy. The outer end faces of the left and right ends of the first pressure plate 104 are respectively fixedly connected to the two folded edges of the open end of the first outer aluminum panel 400 by second locking screws 401, thereby realizing the installation of the first outer aluminum panel 400.

[0045] Furthermore, the first pressure plate 104 has a T-shaped structure, simultaneously connecting the inner column unit 100 and the outer decorative strip unit 600. Specifically, the middle part of the first pressure plate 104 is fixedly connected to the corresponding U-shaped channel steel 102 by two first locking screws 105 arranged at intervals on both sides. The middle part of the first pressure plate 104 is fixedly connected to the outer decorative strip unit 600 by a third locking screw 106 via a first limiting sleeve 107 and a second limiting sleeve 108.

[0046] like Figure 3 As shown, to achieve the fixing function of the first pressure plate 104, a first pressure plate 104 with a specific structural design is adopted. A decorative strip connecting groove 1041 protruding outward is provided in the middle of the outer side wall of the first pressure plate 104, and limiting flanges 1042 bent inward are respectively provided at both ends, and aluminum single-panel locking grooves 1043 protruding outward are respectively provided on the outer side walls of both ends.

[0047] In some of these embodiments, such as Figure 2 , Figure 5 and Figure 6 As shown, the crossbeam unit 200 mainly includes a square tube crossbeam 201, a second pressure plate 203, and a sub-frame connector 205. The square tube crossbeam 201 is made of galvanized square tube. One end of the square tube crossbeam 201 is directly welded to the column unit 100, or is welded to the column unit 100 through a sleeve 206. One end of the sleeve 206 is welded to the column unit 100, and the other end is inserted into the square tube crossbeam 201.

[0048] A plurality of second rubber pads 202 are provided at intervals between the square tube beam 201 and the second outer aluminum single panel 500 covering its outer side. The second rubber pads 202 are made of rubber and have good cushioning elasticity, which can well cover the second outer aluminum single panel 500 on the square tube beam 201.

[0049] One end of the square tube beam 201 is welded to the column unit 100 through the sleeve core 206, and a number of second rubber pads 202 are provided between it and the second outer aluminum single plate 500 covering the outside, and the second pressure plate 203 is provided on its outer side wall.

[0050] To secure the second outer aluminum cladding panel 500, a second pressure plate 203 is provided on the outer wall of the square tube beam 201. The second pressure plate 203 has a T-shaped structure, with its middle part fixedly mounted on the square tube beam 201 by a fourth locking screw 204, and its upper and lower ends respectively pressing the two folded edges of the open end of the second outer aluminum cladding panel 500 onto the square tube beam 201 through the sub-frame connector 205.

[0051] In some of these embodiments, such as Figure 2 and Figure 3 As shown, the first outer aluminum panel 400 is a one-piece 3mm aluminum panel, which is folded at both ends of the opening to form L-shaped folded edge sections. These folded edge sections are fixedly installed on the first pressure plate 104 by the second locking screws 401.

[0052] To improve the stability of the second outer aluminum panel 500 during installation, the inner walls of the two folded edges at the open end of the first outer aluminum panel 400 are connected to the first pressure plate 104 via third rubber pads 402 located inside the second locking screws 401. Two third rubber pads 402 are positioned between the left and right aluminum panel locking slots 1043, arranged symmetrically with the two aluminum panel locking slots 1043. The third rubber pads 402 are made of rubber and, in conjunction with the second locking screws 401, stably install the second outer aluminum panel 500 onto the square tube beam 201.

[0053] In addition, to ensure the stability of the connection with the outer glass unit 300, two sets of fourth rubber pads 403 and first sealing strips 404 are provided between the outer side walls of the two folded edges at the opening end of the first outer aluminum single panel 400 and the outer glass unit 300. The fourth rubber pads 403 are made of rubber, and the first sealing strips 404 are made of sealant coated and cured.

[0054] The first outer aluminum panel 400 uses 3mm aluminum panels. The aluminum panels can be folded, grooved, and spot-welded into a whole, unlike profiles which need to be divided into several sections to meet the architect's design requirements. At the same time, it can better absorb the deformation of the steel column, and the 3mm aluminum panel has a very good overall flatness, resulting in a very good visual effect after completion.

[0055] In some of these embodiments, such as Figure 5 and Figure 6 As shown, L-shaped connecting plates 501 are fixedly installed at the two open ends of the second outer aluminum cladding panel 500. The L-shaped connecting plates 501 and the second outer aluminum cladding panel 500 are integrally formed or connected by welding to form an integral structure. The L-shaped connecting plates 501 are fixedly installed on the outer wall of the beam unit 200 by the fifth locking screw 502, thereby fixing the second outer aluminum cladding panel 500 on the beam unit 200.

[0056] In addition, to ensure the stability of the second outer aluminum panel 500 installation, a sub-frame connector 205 is provided on its outer side wall. By locking the second pressure plate 203, the sub-frame connectors 205 at both ends are pressed tightly against the L-shaped connecting plate 501 to prevent the fifth locking screw 502 on the L-shaped connecting plate 501 from loosening.

[0057] In some of these embodiments, such as Figure 2 and Figure 4 As shown, the large-span aluminum-clad steel curtain wall system also includes an outer decorative strip unit 600 disposed at the connection between two adjacent glass units 300. The outer decorative strip unit 600 includes a third pressure plate 601 and a decorative strip 604, both of which are made of stainless steel or aluminum alloy.

[0058] Specifically, the third pressure plate 601 has an overall π-shaped structure, and its middle part is fixedly connected to the second limiting sleeve 108 on the outer wall of the column unit 100 by the first locking bolt 602; the decorative strip 604 has an overall convex shape, and its inner end is embedded in the outer groove of the third pressure plate 601 and locked and fixed by the second locking bolt 605.

[0059] In addition, to improve the structural stability and overall aesthetics of the exterior trim unit 600, the exterior trim unit 600 also includes a second sealing strip 603 and a side cover plate 606. The second sealing strip 603 is made of EPDM rubber, and the side cover plate 606 is made of aluminum alloy.

[0060] Two second sealing strips 603 are respectively snapped onto the inner sidewalls at both ends of the third pressure plate 601 and the corresponding glass units 300. Correspondingly, two side cover plates 606 are respectively snapped onto the grooves on both sides of the third pressure plate 601, and their outer surfaces are flush with the outer surfaces of the outer decorative strip units 600.

[0061] In summary, as Figure 2 As shown, the core solution of this large-span aluminum-clad steel curtain wall system is that 3mm aluminum panels can be made into a single unit according to the architect's required shape, without the need for... Figure 1 That's how the profile is divided into multiple sections for design purposes; currently... Figure 1 The previous method required very high precision in the machining of the steel columns, while the improved system... Figure 2 The proposed solution effectively absorbs the deformation of the steel column. Figure 2 The actual visual effect after completion will be better than the existing one. Figure 1 Even better, it is less prone to warping or detachment during future use. Therefore, the system can perfectly absorb the deformation of the steel columns, and the outer aluminum panel shape meets the requirements of the building facade. At the same time, the construction time is shorter and more convenient and faster.

[0062] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0063] Secondly, the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0064] Finally, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A large-span aluminum-clad steel curtain wall system, characterized in that, It includes a column unit (100), a beam unit (200), a glass unit (300), a first outer aluminum panel (400), and a second outer aluminum panel (500), wherein: the cross-section of the first outer aluminum panel (400) and the second outer aluminum panel (500) are both integral inverted U-shaped structures, respectively covering the column unit (100) and the beam unit (200), and their inner open ends are respectively fixedly installed on the outer walls of the column unit (100) and the beam unit (200).

2. The large-span aluminum-clad steel curtain wall system according to claim 1, characterized in that, The column unit (100) includes a steel column (101) and a U-shaped channel steel (102), wherein: The U-shaped channel steel (102) consists of several groups, with two in each group, and is symmetrically installed on the inner and outer walls of the steel column (101), with each group of U-shaped channel steel (102) spaced apart along the length of the steel column (101).

3. The large-span aluminum-clad steel curtain wall system according to claim 2, characterized in that, A plurality of first rubber pads (103) are provided at intervals between the column unit (100) and the first outer aluminum single panel (400) covering its outer side.

4. The large-span aluminum-clad steel curtain wall system according to claim 2, characterized in that, A first pressure plate (104) is provided between the outer wall of the column unit (100) and the two glass units (300) on its outer side, wherein: The first pressure plate (104) has a T-shaped structure, and its middle part is fixedly connected to the corresponding U-shaped channel steel (102) by two first locking screws (105) arranged at intervals on the left and right. The outer end faces of the left and right ends of the first pressure plate (104) are respectively fixedly connected to the two folded edges of the opening end of the first outer aluminum single plate (400) by second locking screws (401); and The middle part of the first pressure plate (104) is fixedly connected to the outer decorative strip unit (600) via the third locking screw (106), the first limiting sleeve (107), and the second limiting sleeve (108).

5. The large-span aluminum-clad steel curtain wall system according to claim 4, characterized in that, The first pressure plate (104) has a decorative strip connecting groove (1041) protruding outward in the middle of the outer side wall, and limit stops (1042) bent inward in each end, and aluminum single panel locking grooves (1043) protruding outward in each end.

6. The large-span aluminum-clad steel curtain wall system according to claim 1, characterized in that, The beam unit (200) includes a square tube beam (201), a second pressure plate (203), and a sub-frame connector (205), wherein: One end of the square tube beam (201) is welded to the column unit (100) through the sleeve core (206), and a number of second rubber pads (202) are provided between it and the second outer aluminum single plate (500) covering the outside, and the second pressure plate (203) is provided on its outer side wall. The second pressure plate (203) has a T-shaped structure. Its middle part is fixedly installed on the square tube beam (201) by the fourth locking screw (204). The upper and lower ends are respectively pressed on the square tube beam (201) by the sub-frame connector (205) to the two folded edges of the opening end of the second outer aluminum single panel (500).

7. The large-span aluminum-clad steel curtain wall system according to claim 1, characterized in that, The two folded edges of the opening end of the first outer aluminum single panel (400) are respectively fixedly installed on the first pressure plate (104) by the second locking screw (401); The inner sidewalls of the two folded edges at the open end of the first outer aluminum cladding (400) are connected to the first pressure plate (104) via a third rubber pad (402) located inside the second locking screw (401); and The outer walls of the two folded edges at the open end of the first outer aluminum single panel (400) are connected to the outer glass unit (300) through the fourth rubber pad (403) and the first sealing strip (404).

8. The large-span aluminum-clad steel curtain wall system according to claim 1, characterized in that, The two open ends of the second outer aluminum single panel (500) are respectively fixedly provided with L-shaped connecting plates (501). The L-shaped connecting plates (501) are fixedly installed on the outer wall of the beam unit (200) by the fifth locking screw (502), and their outer walls are abutting and connected to the sub-frame connector (205) on the beam unit (200).

9. The large-span aluminum-clad steel curtain wall system according to claim 1, characterized in that, It also includes an outer decorative strip unit (600) disposed at the connection between two adjacent glass units (300), the outer decorative strip unit (600) including a third pressure plate (601) and a decorative strip (604), wherein: The third pressure plate (601) has an overall π-shaped structure, and the middle part is fixedly connected to the second limiting sleeve (108) on the outer wall of the column unit (100) by the first locking bolt (602); The decorative strip (604) has a convex shape, and its inner end is embedded in the outer groove of the third pressure plate (601) and locked and fixed by the second locking bolt (605).

10. The large-span aluminum-clad steel curtain wall system according to claim 9, characterized in that, The exterior trim unit (600) further includes a second sealing strip (603) and a side cover plate (606), wherein: The second sealing strip (603) consists of two strips, which are respectively snapped between the inner sidewalls of both ends of the third pressure plate (601) and the corresponding glass unit (300); There are two side cover plates (606), which are respectively snapped into the slots on both sides of the third pressure plate (601), and their outer surfaces are flush with the outer surfaces of the outer decorative strip unit (600).