Mullion glass fixing structure of aluminum-plastic composite door and window

Abstract

The utility model provides a mullion fixing glass structure of an aluminum-plastic composite door and window, which belongs to the technical field of doors and windows and comprises first glass, second glass, a first mullion outer frame, a second mullion outer frame, a water outlet, a composite adhesive tape, an isobaric adhesive tape, a first plastic steel profile and a second plastic steel profile. The utility model relates to a mullion outer frame, which comprises a first mullion outer frame, a second mullion outer frame, a plurality of composite adhesive tapes, a heat insulation cavity and a quick-mounting piece, the outer side of first glass is fixedly connected with the upper end of the first mullion outer frame through the composite adhesive tapes, and the lower end of the first mullion outer frame is fixedly connected with the upper end of the second mullion outer frame through the composite adhesive tapes. The lower end of the second mullion outer frame is fixedly connected with the outer side of the second glass through the composite adhesive tape, the inner side of the first glass is fixedly connected with the upper end of the first pressing line through the composite adhesive tape, and the problem that the stability is weakened due to the fact that the fatigue stress of the connecting portion of the two materials of the mullion is too large can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of doors and windows, and in particular relates to a center support fixed glass structure of an aluminum-plastic composite door and window. Background Art

[0002] The center-braced glass structure of aluminum-plastic composite doors and windows refers to a method of securing the glass to the sash within the window frame using a center brace. This differs from simple adhesive bonding or clamping with a pressure strip. The center brace typically runs from top to bottom of the frame, contacting the side of the glass and firmly connecting to the frame, forming a stable triangular or polygonal structure that enhances the glass's resistance to pressure, wind, and earthquakes.

[0003] Existing aluminum-plastic composite doors and windows utilize a central brace that directly connects an aluminum alloy back panel to a plastic frame. This method is favored for its simple, fast manufacturing process and relatively low cost. However, when the temperature fluctuates, the aluminum alloy and plastic expand or contract differently. This differential expansion and contraction generates persistent fatigue stress in the joints, leading to fatigue damage. Specifically, glue joints may crack or debond, while bolted joints may loosen or even fall off. These problems not only affect the overall strength and stability of the doors and windows, but also directly impact their waterproofing. Utility Model Content

[0004] In view of this, the utility model provides a center support fixed glass structure for aluminum-plastic composite doors and windows, which can solve the problem of excessive fatigue stress at the connection between two materials of the center support, resulting in reduced stability.

[0005] The utility model is achieved in this way:

[0006] The utility model provides a center support fixed glass structure of an aluminum-plastic composite door and window, which includes a first glass, a second glass, a first center support outer frame, a second center support outer frame, a drain outlet, a composite adhesive strip, an isobaric adhesive strip, a first plastic-steel profile, a second plastic-steel profile, an insulation cavity and a quick-install part, wherein the number of the composite adhesive strips is multiple, the outer side of the first glass is fixedly connected to the upper end of the first center support outer frame through the composite adhesive strip, the lower end of the first center support outer frame is fixedly connected to the upper end of the second center support outer frame through the composite adhesive strip, and the lower end of the second center support outer frame is fixedly connected to the outer side of the second glass through the composite adhesive strip. The first glass is fixedly connected with the upper end of the first pressure line through the composite adhesive strip, the lower end of the first pressure line is slidably installed with the upper end of the first plastic-steel profile, the lower end of the first plastic-steel profile is fixedly connected with the upper end of the second plastic-steel profile through the composite adhesive strip, the lower end of the second plastic-steel profile is slidably installed with the upper end of the second pressure line, and the second pressure line is fixedly connected with the inner side of the second glass through the composite adhesive strip; the first middle support outer frame is connected to the first plastic-steel profile through the quick-fitting part, and the second middle support outer frame is connected to the second plastic-steel profile through another quick-fitting part.

[0007] The technical effects of the center-support fixed glass structure of an aluminum-plastic composite door and window provided by the utility model are as follows: the outer layer of this design is an aluminum center-support outer frame, and the inner layer is a plastic profile, which combines the advantages of both materials. The first center-support outer frame and the second center-support outer frame of the aluminum material have high strength and hardness, can withstand large external forces, ensure the stability and durability of the doors and windows, and are not easy to deform or damage. Aluminum has good corrosion resistance and aging resistance, is not easy to rust or age, and extends the service life of doors and windows. The surface of aluminum can be subjected to a variety of surface treatments, such as spraying, anodizing, etc., which can present a variety of colors and textures, and enhance the aesthetics of doors and windows. The first plastic-steel profile and the second plastic-steel profile of the plastic have low thermal conductivity and good thermal insulation performance, which can effectively reduce indoor and outdoor heat exchange and save energy. Compared with aluminum, the cost of plastic is lower, which reduces the manufacturing cost of doors and windows. The first and second center support frames are attached to the first and second plastic-steel profiles using quick-release fittings. This connection not only provides a secure mechanical connection but also withstands changing environmental conditions. When temperature fluctuations cause the aluminum and plastic frames to expand or contract to varying degrees, the quick-release fittings allow for a certain degree of relative displacement, preventing excessive stress. This acts as a "buffer," absorbing the resulting displacement differences caused by thermal expansion and contraction.

[0008] On the basis of the above technical solution, the center support fixed glass structure of the aluminum-plastic composite door and window of the present invention can also be improved as follows:

[0009] Wherein, the first center support outer frame and the second center support outer frame both include an outer frame body and a snap-in slot, the snap-in slot includes an inlet and an inner cavity, and the size of the inlet is smaller than the size of the inner cavity.

[0010] Furthermore, the quick-install part includes a fixing part, a clamping part, an adjusting part and a fixed shaft. The fixing part is a circular structure. The clamping part is fixedly connected to the fixing part. The clamping part is a rectangular structure. The midpoints of the fixing part and the clamping part coincide. The fixing part is fixedly connected to the adjusting part. The fixed shaft passes through the clamping part and the fixing part in sequence and is fixedly connected to the side wall of the first plastic-steel profile or the second plastic-steel profile. The fixed shaft is rotatably connected to the fixing part and the clamping part. The angle between the clamping part and the adjusting part is a right angle. The fixed shaft is a T-shaped structure.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are: the right angle between the clamping part and the adjusting part can ensure that the adjusting part is hidden in the gap when the clamping part is clamped into the inner cavity, and the tightness of the clamping can be judged by judging the rotation degree of the adjusting part.

[0012] Furthermore, the length of the short side of the clip is smaller than the width of the entrance, the length of the long side of the clip is larger than the width of the entrance, the thickness of the clip is smaller than the depth of the inner cavity, and the length of the long side of the clip is smaller than the width of the inner cavity.

[0013] Furthermore, the insulation cavity is surrounded by the first glass, the first pressure line, the first plastic-steel profile and the first center support outer frame, the second insulation cavity is surrounded by the first plastic-steel profile, the second plastic-steel profile and the second center support outer frame, and the third insulation cavity is surrounded by the second pressure line, the second plastic-steel profile and the second center support outer frame, and the insulation cavity is used for insulation.

[0014] The benefits of this improved solution include: the insulation cavity effectively inhibits air convection, reducing heat loss due to air movement. This significantly improves the window's thermal insulation performance and reduces its U-value (heat transfer coefficient). This means the window provides better insulation and more effectively maintains indoor temperature, thereby reducing energy consumption for heating or cooling.

[0015] Furthermore, the isobaric strip is provided inside the second insulation cavity, and the isobaric strip is fixedly connected to the first plastic-steel profile, the second plastic-steel profile and the second center support outer frame respectively, and the isobaric strip is a foamed structure with a slope.

[0016] The benefits of this improved solution include: the foam structure contains numerous small, enclosed bubbles that act as insulators, effectively blocking the transmission of air and sound. The foam structure effectively fills the gaps between door and window frames and sashes, ensuring a good seal even in large gaps. The sloped structure also effectively guides the drainage of accumulated water.

[0017] Furthermore, a galvanized steel lining and a plurality of plastic-steel cavities are provided inside the first plastic-steel profile and the second plastic-steel profile, and the thickness of the galvanized steel lining is 1.5 mm.

[0018] Wherein, the first center support outer frame and the second center support outer frame are made of aluminum, and the first plastic-steel profile and the second plastic-steel profile are made of plastic.

[0019] Wherein, the second center support outer frame is provided with the drain port, and the drain port is used to drain the accumulated water.

[0020] The first glass and the second glass are arranged in parallel, and the first glass and the second glass are not on the same straight line.

[0021] Compared with the prior art, the beneficial effect of the center-support fixed glass structure of an aluminum-plastic composite door and window provided by the utility model is that the outer layer of this design is an aluminum center-support outer frame, and the inner layer is a plastic profile, which combines the advantages of both materials. The first center-support outer frame and the second center-support outer frame of the aluminum material have high strength and hardness, can withstand large external forces, ensure the stability and durability of the doors and windows, and are not easy to deform or damage. Aluminum has good corrosion resistance and aging resistance, is not easy to rust or age, and extends the service life of doors and windows. The surface of aluminum can be subjected to a variety of surface treatments, such as spraying, anodizing, etc., which can present a variety of colors and textures, and enhance the aesthetics of doors and windows. The first plastic-steel profile and the second plastic-steel profile of the plastic have low thermal conductivity and good thermal insulation performance, which can effectively reduce indoor and outdoor heat exchange and save energy. Compared with aluminum, the cost of plastic is lower, which reduces the manufacturing cost of doors and windows. The first and second center support frames are attached to the first and second plastic-steel profiles using quick-release fittings. This connection not only provides a secure mechanical connection but also withstands changing environmental conditions. When temperature fluctuations cause the aluminum and plastic frames to expand or contract to varying degrees, the quick-release fittings allow for a certain degree of relative displacement, preventing excessive stress. This acts as a "buffer," absorbing the resulting displacement differences caused by thermal expansion and contraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 This is a cross-sectional view of a center support fixed glass structure of an aluminum-plastic composite door and window;

[0024] Figure 2 A cross-sectional view of a second installation method for a center support fixed glass structure of an aluminum-plastic composite door and window;

[0025] Figure 3 This is a front view of a quick-install component for fixing the glass structure in the center support of an aluminum-plastic composite door and window;

[0026] Figure 4 A cross-sectional view of a quick-install component for fixing the glass structure in the center support of an aluminum-plastic composite door and window;

[0027] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0028] 10. First glass; 11. Second glass; 12. First center support outer frame; 13. Second center support outer frame; 14. Outer frame body; 15. Snap-in groove; 151. Inlet; 152. Inner cavity; 16. Drain outlet; 17. Composite rubber strip; 18. Isobaric rubber strip; 19. First plastic-steel profile; 20. Second plastic-steel profile; 21. Insulation cavity; 22. Galvanized steel lining; 23. Plastic-steel cavity; 24. Quick-install parts; 241. Fixing parts; 242. Snap-in parts; 243. Adjusting parts; 244. Fixed axis; 25. First pressing line; 26. Second pressing line. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0030] like Figure 1-4As shown, it is an embodiment of a center-support fixed glass structure of an aluminum-plastic composite door and window provided by the present invention. In this embodiment, it includes a first glass 10, a second glass 11, a first center-support outer frame 12, a second center-support outer frame 13, a drain 16, a composite adhesive strip 17, an isobaric adhesive strip 18, a first plastic-steel profile 19, a second plastic-steel profile 20, an insulation cavity 21 and a quick-install part 24, wherein the number of the composite adhesive strips 17 is multiple, the outer side of the first glass 10 is fixedly connected to the upper end of the first center-support outer frame 12 through the composite adhesive strip 17, the lower end of the first center-support outer frame 12 is fixedly connected to the upper end of the second center-support outer frame 13 through the composite adhesive strip 17, and the lower end of the second center-support outer frame 13 is fixedly connected to the upper end of the second center-support outer frame 13 through the composite adhesive strip 17. The rubber strip 17 is fixedly connected to the outer side of the second glass 11, the inner side of the first glass 10 is fixedly connected to the upper end of the first pressure line 25 through the composite rubber strip 17, the lower end of the first pressure line 25 is slidably installed with the upper end of the first plastic-steel profile 19, the lower end of the first plastic-steel profile 19 is fixedly connected to the upper end of the second plastic-steel profile 20 through the composite rubber strip 17, the lower end of the second plastic-steel profile 20 is slidably installed with the upper end of the second pressure line 26, and the second pressure line 26 is fixedly connected to the inner side of the second glass 11 through the composite rubber strip 17; the first middle support outer frame 12 is connected to the first plastic-steel profile 19 through a quick-fitting part 24, and the second middle support outer frame 13 is connected to the second plastic-steel profile 20 through another quick-fitting part 24.

[0031] The quick-installing member 24 is made of plastic and has certain elasticity and mobility.

[0032] The first glass 10 and the second glass 11 are triple-glass, double-cavity, double-pane, double-silver low-e insulation glass with a K value of less than 0.75w / kh;

[0033] The K value represents the heat transfer coefficient of the window. The smaller the value, the better the thermal insulation performance of the window and the slower the heat loss through the window.

[0034] 0.75w / kh means that for every square meter of window area and every temperature difference of 1 degree Celsius, the heat transferred through this piece of glass per hour is less than 0.75 watts.

[0035] Triple glass: refers to the glass consisting of three layers of glass.

[0036] Two-chamber: refers to the two cavities filled with dry air between the three layers of glass. The air in the cavity is evacuated and filled with inert gas (which can further improve the thermal insulation effect).

[0037] Double Silver Low-E: refers to low-emissivity coated glass. "Double Silver" means that both pieces of Low-E glass are coated with a low-emissivity film. "Double Silver" has a better thermal insulation effect than single silver Low-E glass.

[0038] In the above technical solution, both the first center support outer frame 12 and the second center support outer frame 13 include an outer frame body 14 and a snap-in slot 15 . The snap-in slot 15 includes an inlet 151 and an inner cavity 152 . The size of the inlet 151 is smaller than that of the inner cavity 152 .

[0039] Furthermore, in the above technical solution, the quick-install part 24 includes a fixing part 241, a clamping part 242, an adjusting part 243 and a fixed shaft 244. The fixing part 241 is a circular structure. The clamping part 242 is fixedly connected to the fixing part 241. The clamping part 242 is a rectangular structure. The midpoint of the fixing part 241 coincides with the midpoint of the clamping part 242. The fixing part 241 is fixedly connected to the adjusting part 243. The fixed shaft 244 passes through the clamping part 242 and the fixing part 241 in sequence and is fixedly connected to the side wall of the first plastic-steel profile 19 or the second plastic-steel profile 20. The fixed shaft 244 is rotatably connected to the fixing part 241 and the clamping part 242. The angle between the clamping part 242 and the adjusting part 243 is a right angle. The fixed shaft 244 is a T-shaped structure.

[0040] The clamping member 242 is fixedly connected to the fixing member 241 via a cylindrical connecting block below. The diameter of the connecting block is smaller than the length of the short side of the clamping member 242 .

[0041] Furthermore, in the above technical solution, the length of the short side of the clip 242 is less than the width of the inlet 151, the length of the long side of the clip 242 is greater than the width of the inlet 151, the thickness of the clip 242 is less than the depth of the inner cavity 152, and the length of the long side of the clip 242 is less than the width of the inner cavity 152.

[0042] Furthermore, in the above technical solution, an insulation cavity 21 is enclosed between the first glass 10, the first pressure line 25, the first plastic-steel profile 19 and the first center support outer frame 12; a second insulation cavity 21 is enclosed between the first plastic-steel profile 19, the second plastic-steel profile 20 and the second center support outer frame 13; and a third insulation cavity 21 is enclosed between the second pressure line 26, the second plastic-steel profile 20 and the second center support outer frame 13. The insulation cavity 21 is used for insulation.

[0043] Furthermore, in the above technical solution, an isobaric rubber strip 18 is provided inside the second insulation cavity 21, and the isobaric rubber strip 18 is fixedly connected to the first plastic-steel profile 19, the second plastic-steel profile 20 and the second center support frame 13 respectively. The isobaric rubber strip 18 is a foamed structure with a slope.

[0044] Furthermore, in the above technical solution, a galvanized steel lining 22 and a plurality of plastic-steel cavities 23 are provided inside the first plastic-steel profile 19 and the second plastic-steel profile 20, and the thickness of the galvanized steel lining 22 is 1.5 mm.

[0045] In the above technical solution, the first center support outer frame 12 and the second center support outer frame 13 are made of aluminum, and the first plastic-steel profile 19 and the second plastic-steel profile 20 are made of plastic.

[0046] In the above technical solution, a drain outlet 16 is provided on the second center support outer frame 13 , and the drain outlet 16 is used to drain the accumulated water.

[0047] In the above technical solution, the first glass 10 and the second glass 11 are arranged in parallel, and the first glass 10 and the second glass 11 are not on the same straight line.

[0048] When installing and connecting the center support outer frame made of different materials and the plastic-steel profile, the quick-install part 24 is first fixed on the plastic-steel profile.

[0049] Method 1: Rotate the clamping member 242 to a suitable position so that the clamping member 242 Figure 1 As shown in the cross-sectional view, the long side of the clip 242 can be seen. The first center support frame 12 or the second center support frame 13 is slidably installed with the quick-install part 24 in the longitudinal direction, just so that the clip 242 is inserted into the inner cavity 152 and the clip 242 cannot pass directly out through the inlet 151, thereby realizing the connection between the inner and outer center support frames and the plastic-steel profile, and then the composite rubber strip 17 is installed to fix the position of the first center support frame 12 or the second center support frame 13.

[0050] Method 2: Rotate the clamping member 242 to an appropriate position so that the clamping member 242 Figure 2 As shown in the cross-sectional view, the short side of the clip 242 can be seen. The second center support outer frame 13 is directly put on the clip 242. Since the short side size of the clip 242 is smaller than the inlet 151, the clip 242 smoothly enters the inner cavity 152. At this time, part of the composite rubber strip 17 is installed to fix the position of the first center support outer frame 12 or the second center support outer frame 13. The fixing part 241 and the clip 242 are rotated by the adjusting part 243 under the first center support outer frame 12 or the second center support outer frame 13 so that the long side of the clip 242 replaces the original short side position. At this time, the adjusting part 243 is rotated to the inner side of the center support outer frame. After the rotation is completed, as shown in FIG. Figure 1 shown.

[0051] In a high humidity environment, the water on the surface of the center support easily evaporates and stays inside the center support outer frame, resulting in water accumulation. The water is discharged through the drain port 16.

[0052] Specifically, the principle of the present invention is: when installing and connecting the center support outer frame made of different materials and the plastic-steel profile, the quick-install part 24 is first fixed on the plastic-steel profile.

[0053] Method 1: Rotate the clamping member 242 to a suitable position so that the clamping member 242 Figure 1As shown in the cross-sectional view, the long side of the clip 242 can be seen. The first center support frame 12 or the second center support frame 13 is slidably installed with the quick-install part 24 in the longitudinal direction, just so that the clip 242 is inserted into the inner cavity 152 and the clip 242 cannot pass directly out through the inlet 151, thereby realizing the connection between the inner and outer center support frames and the plastic-steel profile, and then the composite rubber strip 17 is installed to fix the position of the first center support frame 12 or the second center support frame 13.

[0054] Method 2: Rotate the clamping member 242 to an appropriate position so that the clamping member 242 Figure 2 As shown in the cross-sectional view, the short side of the clip 242 can be seen. The second center support outer frame 13 is directly put on the clip 242. Since the short side size of the clip 242 is smaller than the inlet 151, the clip 242 smoothly enters the inner cavity 152. At this time, part of the composite rubber strip 17 is installed to fix the position of the first center support outer frame 12 or the second center support outer frame 13. The fixing part 241 and the clip 242 are rotated by the adjusting part 243 under the first center support outer frame 12 or the second center support outer frame 13 so that the long side of the clip 242 replaces the original short side position. At this time, the adjusting part 243 is rotated to the inner side of the center support outer frame. After the rotation is completed, as shown in FIG. Figure 1 shown.

[0055] In a high humidity environment, the water on the surface of the center support easily evaporates and stays inside the center support outer frame, resulting in water accumulation. The water is discharged through the drain port 16.

[0056] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A central support fixed glass structure for aluminum-plastic composite doors and windows, characterized in that: The invention comprises a first glass (10), a second glass (11), a first center support outer frame (12), a second center support outer frame (13), a drain outlet (16), a composite adhesive strip (17), an isobaric adhesive strip (18), a first plastic-steel profile (19), a second plastic-steel profile (20), an insulation cavity (21) and a quick-install part (24), wherein the number of the composite adhesive strips (17) is multiple, the outer side of the first glass (10) is fixedly connected to the upper end of the first center support outer frame (12) through the composite adhesive strip (17), the lower end of the first center support outer frame (12) is fixedly connected to the upper end of the second center support outer frame (13) through the composite adhesive strip (17), the lower end of the second center support outer frame (13) is fixedly connected to the outer side of the second glass (11) through the composite adhesive strip (17), and the first glass The inner side of (10) is fixedly connected to the upper end of the first pressure line (25) through the composite adhesive strip (17), the lower end of the first pressure line (25) is slidably installed with the upper end of the first plastic-steel profile (19), the lower end of the first plastic-steel profile (19) is fixedly connected to the upper end of the second plastic-steel profile (20) through the composite adhesive strip (17), the lower end of the second plastic-steel profile (20) is slidably installed with the upper end of the second pressure line (26), and the second pressure line (26) is fixedly connected to the inner side of the second glass (11) through the composite adhesive strip (17); the first center support outer frame (12) is connected to the first plastic-steel profile (19) through the quick-install part (24), and the second center support outer frame (13) is connected to the second plastic-steel profile (20) through another quick-install part (24).

2. The center support fixed glass structure of the aluminum-plastic composite door and window according to claim 1, characterized in that: The first center support outer frame (12) and the second center support outer frame (13) both include an outer frame body (14) and a snap-fit ​​groove (15); the snap-fit ​​groove (15) includes an inlet (151) and an inner cavity (152); the size of the inlet (151) is smaller than the size of the inner cavity (152).

3. The center support fixed glass structure of the aluminum-plastic composite door and window according to claim 2, characterized in that: The quick-install part (24) includes a fixing part (241), a clamping part (242), an adjusting part (243) and a fixed shaft (244). The fixing part (241) is a circular structure. The clamping part (242) is fixedly connected to the fixing part (241). The clamping part (242) is a rectangular structure. The midpoints of the fixing part (241) and the clamping part (242) coincide with each other. The fixing part (241) and the adjusting part (243) are fixed to each other. The fixing shaft (244) sequentially passes through the clamping member (242) and the fixing member (241) and is fixedly connected to the side wall of the first plastic-steel profile (19) or the second plastic-steel profile (20); the fixing shaft (244) is rotatably connected to the fixing member (241) and the clamping member (242); the angle between the clamping member (242) and the adjusting member (243) is a right angle; and the fixing shaft (244) is a T-shaped structure.

4. The center support fixed glass structure of the aluminum-plastic composite door and window according to claim 3, characterized in that: The length of the short side of the clamping member (242) is less than the width of the inlet (151), the length of the long side of the clamping member (242) is greater than the width of the inlet (151), the thickness of the clamping member (242) is less than the depth of the inner cavity (152), and the length of the long side of the clamping member (242) is less than the width of the inner cavity (152).

5. The center support fixed glass structure of the aluminum-plastic composite door and window according to claim 4, characterized in that: The heat preservation cavity (21) is surrounded by the first glass (10), the first pressure line (25), the first plastic steel profile (19) and the first center support outer frame (12); the second heat preservation cavity (21) is surrounded by the first plastic steel profile (19), the second plastic steel profile (20) and the second center support outer frame (13); the third heat preservation cavity (21) is surrounded by the second pressure line (26), the second plastic steel profile (20) and the second center support outer frame (13); and the heat preservation cavity (21) is used for heat preservation.

6. The center support fixed glass structure of the aluminum-plastic composite door and window according to claim 5, characterized in that: The second heat preservation cavity (21) is provided with the isobaric rubber strip (18), and the isobaric rubber strip (18) is fixedly connected to the first plastic steel profile (19), the second plastic steel profile (20) and the second center support outer frame (13) respectively. The isobaric rubber strip (18) is a foamed structure with a slope.

7. The center support fixed glass structure of the aluminum-plastic composite door and window according to claim 6, characterized in that: A galvanized steel lining (22) and a plurality of plastic steel cavities (23) are provided inside the first plastic steel profile (19) and the second plastic steel profile (20), and the thickness of the galvanized steel lining (22) is 1.5 mm.

8. The center support fixed glass structure of the aluminum-plastic composite door and window according to claim 1, characterized in that: The first center support outer frame (12) and the second center support outer frame (13) are made of aluminum, and the first plastic-steel profile (19) and the second plastic-steel profile (20) are made of plastic.

9. The center support fixed glass structure of the aluminum-plastic composite door and window according to claim 1, characterized in that: The second center support outer frame (13) is provided with the drain port (16), and the drain port (16) is used to drain accumulated water.

10. The center support fixed glass structure of the aluminum-plastic composite door and window according to claim 1, characterized in that: The first glass (10) and the second glass (11) are arranged in parallel, and the first glass (10) and the second glass (11) are not on the same straight line.

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