Energy-saving broken bridge aluminum door and window

By setting up multiple sealing structures at the connection of window frames and window sashes, the problem of insufficient sealing capacity of broken bridge aluminum doors and windows is solved, the sealing performance and thermal insulation and sound insulation effect are improved, and the window operation force is reduced.

CN223281938UActive Publication Date: 2025-08-29XIAMEN SCHMIED INTELLIGENT TECH CO LTD
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Patent Information

Application Number
CN202422593995.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-25
Publication Date
2025-08-29
Estimated Expiration
2034-10-25

AI Technical Summary

Technical Problem

The sealing capacity of conventional broken bridge aluminum doors and windows is poor, resulting in poor thermal and sound insulation effects.

Method used

Multiple sealing structures are arranged at the connection between the window frame and the window sash, including the top contact between the upper sealing protrusion and the lower sealing protrusion, combined with the sealing strips on the inner and outer sides, forming a multiple seal to enhance the sealing effect.

Benefits of technology

The sealing performance of broken bridge aluminum doors and windows is improved, windproof, heat insulation and sound insulation are enhanced, and the need to open and close windows is reduced.

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Abstract

The utility model relates to the field of broken bridge aluminum, in particular to an energy-saving broken bridge aluminum door and window which comprises a window frame assembly and a window sash assembly, the window frame assembly comprises an outer window frame and an inner window frame, the window sash assembly comprises an outer window sash and an inner window sash, a first connecting piece is arranged between the outer window frame and the inner window frame, and a second connecting piece is arranged between the outer window sash and the inner window sash. A lower sealing block is arranged at the top of the first connecting piece, an upper sealing protrusion protruding outwards is arranged at the bottom of the second connecting piece, a lower sealing protrusion protruding outwards is arranged on one side of the lower sealing block, the lower sealing protrusion abuts against and makes contact with the side face of the upper sealing protrusion, and at least one sealing arm is arranged on the lower sealing block. A first sealing strip is fixed to the bottom of the outer window sash, a second sealing strip is fixed to the top of the inner window frame, the side portion of the upper sealing protrusion abuts against and makes contact with the lower sealing protrusion, the sealing arm makes close contact with the upper sealing protrusion, the first sealing strip and the second sealing strip on the inner side and the outer side are matched, and the sealing effect of the broken bridge aluminum door and window is effectively improved.
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Description

Technical Field

[0001] The utility model relates to the field of thermal break aluminum, in particular to an energy-saving thermal break aluminum door and window. Background Art

[0002] Thermally insulated aluminum, also known as thermally insulated aluminum profiles or thermally insulated aluminum alloys, is a high-quality material widely used in the construction industry. The "broken bridge" in its name implies that the aluminum alloy's original heat conduction path has been interrupted through a special design, significantly improving the material's thermal insulation properties. Specifically, thermally insulated aluminum uses thermally insulated strips such as hard plastic or PA66 nylon to break the aluminum alloy down the middle and tightly connect the broken parts into a single piece, forming a new type of thermally insulated aluminum profile. This design allows thermally insulated aluminum doors and windows to maintain the original high strength and corrosion resistance of the aluminum alloy while having a lower thermal conductivity coefficient, effectively keeping the interior warm in winter and cool in summer, greatly reducing energy consumption.

[0003] In addition to excellent thermal insulation, these aluminum doors and windows also offer excellent waterproofing, soundproofing, dustproofing, and fireproofing. They utilize high-quality sealing strips and sealants, along with a specially designed drainage system, to effectively prevent the penetration of moisture and other impurities, ensuring a dry and clean interior. Furthermore, these aluminum doors and windows offer excellent soundproofing, effectively isolating external noise and providing users with a quiet and comfortable indoor environment.

[0004] For example, the invention patent with application number CN202111075914.0, named Energy-saving Thermal Break Aluminum Doors and Windows, includes a first window frame, a second window frame and a first connecting member for connecting the first window frame and the second window frame, the interior of the first window frame and the interior of the second window frame are both hollow structures and form a first vacuum cavity; a first sash frame, a second sash frame and a second connecting member for connecting the first sash frame and the second sash frame, the first sash frame is rotatably connected to the first window frame, the interior of the first sash frame and the interior of the second sash frame are both hollow structures and form a second vacuum cavity; the window frame assembly and the window sash assembly are sealed only by a first sealing strip and a second sealing strip, and the sealing ability is poor, so that the overall structure has poor heat insulation and sound insulation effects. Utility Model Content

[0005] The purpose of the utility model is to provide an energy-saving thermal break aluminum door and window, aiming to improve the problem that conventional thermal break aluminum doors and windows are sealed only by the first and second sealing strips, which have poor sealing ability and make the overall structure have poor heat insulation and sound insulation effects.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An energy-saving thermal break aluminum door and window, comprising a window frame assembly and a window sash assembly, wherein the window frame assembly comprises an outer window frame and an inner window frame, and the window sash assembly comprises an outer window sash and an inner window sash.

[0008] A first connecting member is provided between the outer window frame and the inner window frame, and a second connecting member is provided between the outer window sash and the inner window sash, and the first connecting member and the second connecting member are in the same vertical extension direction; a lower sealing block is provided on the top of the first connecting member, and an upper sealing protrusion protruding outward is provided on the bottom of the second connecting member, and a lower sealing protrusion protruding outward is provided on one side of the lower sealing block, and the lower sealing protrusion is in contact with the side surface of the upper sealing protrusion; at least one sealing arm is provided on the lower sealing block, the length of the sealing arm is greater than the distance between the lower sealing block and the upper sealing protrusion, and the sealing arm is in contact with the upper sealing protrusion;

[0009] The bottom of the outer window sash extends downward and is fixed with a first sealing strip, which contacts the top of the outer window frame; the top of the inner window frame extends upward and is fixed with a second sealing strip, which contacts the top of the inner window sash.

[0010] Furthermore, at least one lower weight-reducing channel is provided on the lower sealing block, and the lower weight-reducing channel is located below the sealing arm.

[0011] Furthermore, the lower sealing protrusion is a solid sealing protrusion.

[0012] Furthermore, an upper weight-reducing channel is provided on the upper sealing protrusion, and the upper weight-reducing channel is located above the sealing arm.

[0013] Furthermore, a first extension arm extending downward is provided at the bottom of the outer window sash, a first installation notch is provided on the inner side of the first extension arm, and the first sealing strip is fixed in the first installation notch;

[0014] A second extension arm extending upward is provided on the top of the inner window frame, a second installation notch is provided on the inner side of the second extension arm, and the second sealing strip is fixed in the second installation notch.

[0015] Furthermore, the first sealing strip includes an embedding portion and a buffer portion connected to each other, the embedding portion is embedded in the first installation notch, and the buffer portion is triangular and extends downward.

[0016] A first cavity and a second cavity are respectively defined in the embedding portion and the buffer portion.

[0017] Furthermore, the second sealing strip includes a mounting portion, the mounting portion is embedded in the second mounting notch, an upper buffer arm and a lower buffer arm extending outward are provided on the outer side of the mounting portion, and the upper buffer arm is tilted toward the bottom side of the inner window sash;

[0018] The lower buffer arm is arranged to be inclined toward the bottom surface of the inner window sash.

[0019] Furthermore, a top block extending downward is provided on the outer bottom of the inner window sash, and the top block corresponds to the connection position of the upper buffer arm and the lower buffer arm.

[0020] Furthermore, the first connecting member includes a first insulation strip and a second insulation strip, and the first insulation strip and the second insulation strip are sequentially distributed between the inner window frame and the outer window frame from top to bottom.

[0021] The inner top of the inner window frame and the outer window frame are both provided with an upwardly extending mounting block, and both ends of the lower sealing block are provided with mounting notches, which are arranged around the circumference of the mounting block.

[0022] At least two upwardly extending limiting blocks are provided on the top of the first heat-insulating strip, and an outwardly protruding limiting protrusion is provided on the bottom of the lower sealing block. The limiting protrusion is embedded between adjacent limiting blocks.

[0023] Furthermore, outwardly protruding reinforcing ribs are provided on the bottom surfaces of the inner window frame and the outer window frame.

[0024] After adopting the above technical solution, the utility model has the following advantages compared with the background technology:

[0025] When the window is closed, the first sealing strip contacts the top of the outer window frame, and the second sealing strip contacts the top of the inner window sash, sealing the inside and outside of the window. At the same time, the side of the upper sealing protrusion contacts the top of the lower sealing protrusion, and the upper sealing protrusion bends the sealing arm to ensure close contact between the sealing arm and the upper sealing protrusion, realizing multiple seals inside the doors and windows, and cooperating with the first sealing strip and the second sealing strip on the inside and outside, effectively improving the sealing effect of the thermally insulated aluminum doors and windows, ensuring that they have good windproof, heat-insulating and sound-insulating effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of the energy-saving thermal break aluminum doors and windows of the present invention;

[0027] Figure 2 This is an enlarged schematic diagram of the structure of part A of the energy-saving thermal break aluminum door and window of the present invention;

[0028] Figure 3 This is an enlarged schematic diagram of the B part structure of the energy-saving thermal break aluminum door and window described in the present invention.

[0029] Description of reference numerals:

[0030] 1. Outer window frame; 11. Mounting block; 12. Reinforcement rib; 13. Mounting boss;

[0031] 2. Inner window frame; 21. Second sealing strip; 211. Mounting portion; 2111. Third cavity; 212. Upper buffer arm; 213. Lower buffer portion; 22. Second extension arm; 221. Second mounting notch;

[0032] 3. Outer sash; 31. First sealing strip; 311. Embedding portion; 3111. First cavity; 312. Buffer portion; 3121. Second cavity; 32. First extension arm; 321. First mounting notch;

[0033] 4. Inner sash; 41. Top block;

[0034] 5. First connecting member; 51. First thermal insulation strip; 511. Limit block; 52. Second thermal insulation strip;

[0035] 6. Second connecting member; 61. Third thermal insulation strip; 62. Fourth thermal insulation strip; 621. Upper sealing protrusion; 622. Upper weight reduction channel;

[0036] 7. Lower sealing block; 71. Lower sealing protrusion; 72. Sealing arm; 73. Lower weight reduction channel; 74. Installation notch; 75. Limiting protrusion. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0038] In addition, it should be noted that the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are all based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] When an element is referred to as being “fixed to,” “disposed on,” or “provided on” another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0040] Unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in the utility model based on specific circumstances.

[0041] Example

[0042] Please refer to Figure 1-3 As shown, this embodiment provides an energy-saving thermally-insulated aluminum door and window, including a window frame assembly and a window sash assembly. The window frame assembly includes an outer window frame 1 and an inner window frame 2, and the window sash assembly includes an outer window sash 3 and an inner window sash 4. A first connecting member 5 is provided between the outer window frame 1 and the inner window frame 2, and a second connecting member 6 is provided between the outer window sash 3 and the inner window sash 4. The first connecting member 5 and the second connecting member 6 extend in the same vertical direction.

[0043] Please refer to Figure 1 As shown, a lower sealing block 7 is provided at the top of the first connecting member 5, and an outwardly protruding upper sealing protrusion 621 is provided at the bottom of the second connecting member 6. An outwardly protruding lower sealing protrusion 71 is provided on one side of the lower sealing block 7, which abuts against the side surface of the upper sealing protrusion 621. The lower sealing block 7 is provided with at least one sealing arm 72. The length of the sealing arm 72 is greater than the distance between the lower sealing block 7 and the upper sealing protrusion 621, and the sealing arm 72 abuts against the upper sealing protrusion 621. In this embodiment, there are two sealing arms 72, but the number of sealing arms 72 can also be one, three, or more.

[0044] The bottom of the outer window sash 3 extends downward and is fixed with a first sealing strip 31, which contacts the outer window frame 1; the top of the inner window frame 2 extends upward and is fixed with a second sealing strip 21, which contacts the inner window sash 4.

[0045] When the window is closed, the first sealing strip 31 is in contact with the outer window frame 1, and the second sealing strip 21 is in contact with the inner window sash 4, sealing the inside and outside of the window. At the same time, the side of the upper sealing protrusion 621 is in contact with the lower sealing protrusion 71, and the upper sealing protrusion 621 bends the sealing arm 72 to ensure close contact between the sealing arm 72 and the upper sealing protrusion 621, realizing multiple seals inside the doors and windows, and cooperating with the first sealing strip 31 and the second sealing strip 21 on the inside and outside, effectively improving the sealing effect of the thermally insulated aluminum doors and windows, ensuring that they have good windproof, heat-insulating and sound-insulating effects.

[0046] At least one lower weight-reducing channel 73 is defined in the lower sealing block 7 and is located below the sealing arms 72. In this embodiment, there are three lower weight-reducing channels 73, each located below the two sealing arms 72. This reduces the material and cost of the lower sealing block 7, reduces the structural strength of the lower sealing block 7 at the lower end of the sealing arms 72, and improves the flexibility of the sealing arms 72, facilitating the upper sealing protrusion 621 to bend and abut against the sealing arms 72. This also reduces the reaction force exerted by the sealing arms 72 during window closing, facilitating window opening.

[0047] Furthermore, the lower sealing protrusion 71 is a solid sealing protrusion. The lower sealing protrusion 71 is set as a solid structure, which effectively improves the structural strength of the lower sealing protrusion 71 and ensures the tightness of the contact between the lower sealing protrusion 71 and the upper sealing protrusion 621, thereby improving the internal sealing effect.

[0048] In this embodiment, an upper weight-reducing channel 622 is defined on the upper sealing protrusion 621 and is located above the sealing arm 72. This channel reduces the material requirements of the upper sealing protrusion 621, further reducing costs. It also enhances the flexibility of the upper sealing protrusion 621. When contacting the lower sealing protrusion 71, it facilitates the bending of the end of the upper sealing protrusion 621, wrapping around the lower sealing protrusion 71 and increasing the contact area between the two, thereby further enhancing the sealing effect within the thermally insulated aluminum door and window. This also further reduces the reaction force generated when the upper sealing protrusion 621 contacts the sealing arm 72, reducing the force required to open and close the thermally insulated aluminum door and window.

[0049] In this embodiment, the first connector 5 includes a first insulation strip 51 and a second insulation strip 52, which are arranged sequentially from top to bottom between the inner window frame 2 and the outer window frame 1. Four mounting protrusions 13 are provided on opposing sides of the inner window frame 2 and the outer window frame 1. These four mounting protrusions 13 are arranged in pairs, with the ends of the first insulation strip 51 and the second insulation strip 52 respectively embedded between adjacent mounting protrusions 13.

[0050] Furthermore, the inner top of the inner window frame 2 and the outer window frame 1 are both provided with an upwardly extending mounting block 11, and mounting notches 74 are provided at both ends of the lower sealing block 7, and the mounting notches 74 are arranged around the circumference of the mounting block 11. The lower sealing block 7 is fixed between the two mounting blocks 11 through the mounting notches 74. Furthermore, the top of the first thermal insulation strip 51 is provided with at least two upwardly extending limiting blocks 511, and the bottom of the lower sealing block 7 is provided with an outwardly protruding limiting protrusion 75, and the limiting protrusion 75 is embedded between adjacent limiting blocks 511. In this embodiment, the number of limiting blocks 511 is two, and the limiting blocks 511 cooperate with the mounting block 11 to limit the lower sealing block 7, so as to avoid displacement of the lower sealing block 7 during the mutual abutment between the lower sealing block 7 and the upper sealing protrusion 621, thereby affecting the internal sealing effect of the thermally insulated aluminum doors and windows.

[0051] In this embodiment, outwardly protruding reinforcing ribs 12 are provided on the bottom surfaces of the inner window frame 2 and the outer window frame 1. The reinforcing ribs 12 enhance the connection strength between the inner window frame 2 and the outer window frame 1 and the external wall structure, ensuring the stability of the energy-saving thermal insulation aluminum door and window installation.

[0052] Please refer to Figure 3 As shown, in this embodiment, four mounting protrusions 13 are also provided on the opposing sides of the inner and outer window sashes 4 and 3. The second connector 6 includes a third thermal insulation strip 61 and a fourth thermal insulation strip 62, which are sequentially arranged from top to bottom between the inner and outer window sashes 4 and 3. An upper sealing protrusion 621 is provided on the bottom surface of the fourth thermal insulation strip 62. The ends of the third and fourth thermal insulation strips 61 and 62 are respectively embedded between the mounting protrusions 13 inside the sash.

[0053] Furthermore, the bottom of the outer window sash 3 is provided with a downwardly extending first extension arm 32. A first mounting notch 321 is provided on the inner side of the first extension arm 32. The first sealing strip 31 is secured within the first mounting notch 321. In this embodiment, the first sealing strip 31 comprises a connected embedding portion 311 and a buffer portion 312. The embedding portion 311 is embedded within the first mounting notch 321, and the buffer portion 312 extends downward in a triangular shape. A first cavity 3111 and a second cavity 3121 are defined within the embedding portion 311 and the buffer portion 312, respectively. The first cavity 3111 and the second cavity 3121 enhance the elasticity of the embedding portion 311 and the buffer portion 312, respectively, improving the shock absorption effect of the first sealing strip 31. These cavities also reduce the structural strength of the first sealing strip 31, facilitating the compression of the first sealing strip 31. During the window closing process, the buffer portion 312 and the outer side surface of the outer window frame 1 transition from separation to line contact and then surface contact, effectively enhancing the sealing effect of the first sealing strip 31. At the same time, the buffer portion 312 extends downward in a triangular shape, and the upper end of the buffer portion 312 applies a force toward the lower end toward the outer window frame 1, further improving the tightness of the contact between the buffer portion 312 and the outer window frame 1, thereby improving the sealing effect.

[0054] Please refer to Figure 2 As shown, further, a second extension arm 22 extending upward is provided at the top of the inner window frame 2, and a second mounting notch 221 is provided on the inner side of the second extension arm 22. The second sealing strip 21 is fixed in the second mounting notch 221. In this embodiment, the second sealing strip 21 includes a mounting portion 211, which is embedded in the second mounting notch 221. An upper buffer arm 212 and a lower buffer arm extending outward are provided on the outer side of the mounting portion 211. The upper buffer arm 212 is tilted toward the bottom side of the inner window sash 4; the lower buffer arm is tilted toward the bottom bottom surface of the inner window sash 4. A third cavity 2111 is provided in the mounting portion 211. The third cavity 2111 effectively increases the elasticity of the mounting portion 211, provides a force for the upper buffer arm 212 and the lower buffer portion 213 toward the inner window sash 4, and improves the tightness of the fit between the upper buffer arm 212 and the lower buffer arm and the inner window sash 4. During the window closing process, the bottom side of the inner sash 4 contacts the upper buffer arm 212 and pushes the upper buffer arm 212 until the bottom side of the inner sash 4 and the second mounting notch 221 respectively contact the two ends of the upper buffer arm 212. The upwardly tilted upper buffer arm 212 has a restoring force toward the inner sash 4, ensuring a tight fit between the upper buffer arm 212 and the inner sash 4. At the same time, the second buffer arm is located at the bottom of the inner window screen and, as the first sealing arm 72 flips upward, fits against the bottom surface of the inner sash 4, improving the sealing effect of the second sealing strip 21.

[0055] In this embodiment, a downwardly extending top block 41 is provided on the outer bottom of the inner sash 4. Top block 41 corresponds to the connection between the upper and lower buffer arms 212. Top block 41 abuts against and compresses the connection between the upper and lower buffer arms 212. The mounting portion 211 applies an upward tilting force to the lower buffer arm, further enhancing the fit between the lower buffer arm and the bottom surface of the inner sash 4, and further improving the sealing effect of the second sealing strip 21.

[0056] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes 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 in 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. An energy-saving thermal break aluminum door and window, characterized in that: It includes a window frame assembly and a window sash assembly, wherein the window frame assembly includes an outer window frame and an inner window frame, and the window sash assembly includes an outer window sash and an inner window sash. A first connecting member is provided between the outer window frame and the inner window frame, and a second connecting member is provided between the outer window sash and the inner window sash, and the first connecting member and the second connecting member are in the same vertical extension direction; a lower sealing block is provided on the top of the first connecting member, and an upper sealing protrusion protruding outward is provided on the bottom of the second connecting member, and a lower sealing protrusion protruding outward is provided on one side of the lower sealing block, and the lower sealing protrusion is in contact with the side surface of the upper sealing protrusion; at least one sealing arm is provided on the lower sealing block, the length of the sealing arm is greater than the distance between the lower sealing block and the upper sealing protrusion, and the sealing arm is in contact with the upper sealing protrusion; The bottom of the outer window sash extends downward and is fixed with a first sealing strip, which contacts the top of the outer window frame; the top of the inner window frame extends upward and is fixed with a second sealing strip, which contacts the top of the inner window sash.

2. The energy-saving thermal break aluminum door and window according to claim 1 is characterized by: At least one lower weight-reducing channel is provided on the lower sealing block, and the lower weight-reducing channel is located below the sealing arm.

3. The energy-saving thermal break aluminum door and window according to claim 1 is characterized by: The lower sealing protrusion is a solid sealing protrusion.

4. The energy-saving thermal break aluminum door and window according to claim 1 is characterized by: An upper weight-reducing channel is provided on the upper sealing protrusion, and the upper weight-reducing channel is located above the sealing arm.

5. The energy-saving thermal break aluminum door and window according to claim 1 is characterized by: The bottom of the outer window sash is provided with a first extension arm extending downward, the inner side of the first extension arm is provided with a first installation notch, and the first sealing strip is fixed in the first installation notch; A second extension arm extending upward is provided on the top of the inner window frame, a second installation notch is provided on the inner side of the second extension arm, and the second sealing strip is fixed in the second installation notch.

6. The energy-saving thermal break aluminum door and window according to claim 5 is characterized by: The first sealing strip includes an embedding portion and a buffer portion connected to each other, the embedding portion is embedded in the first installation notch, and the buffer portion is triangular and extends downward. A first cavity and a second cavity are respectively defined in the embedding portion and the buffer portion.

7. The energy-saving thermal break aluminum door and window according to claim 5 is characterized by: The second sealing strip includes a mounting portion, the mounting portion is embedded in the second mounting notch, an upper buffer arm and a lower buffer arm extending outward are provided on the outer side of the mounting portion, and the upper buffer arm is tilted toward the bottom side of the inner window sash; The lower buffer arm is arranged to be inclined toward the bottom surface of the inner window sash.

8. The energy-saving thermal break aluminum door and window according to claim 7 is characterized by: A top block extending downward is provided on the outer bottom of the inner window sash, and the top block corresponds to the connection position of the upper buffer arm and the lower buffer arm.

9. The energy-saving thermal break aluminum door and window according to claim 1 is characterized by: The first connecting member includes a first insulation strip and a second insulation strip, which are sequentially distributed between the inner window frame and the outer window frame from top to bottom. The inner top of the inner window frame and the outer window frame are both provided with an upwardly extending mounting block, and both ends of the lower sealing block are provided with mounting notches, which are arranged around the circumference of the mounting block. At least two upwardly extending limiting blocks are provided on the top of the first heat-insulating strip, and an outwardly protruding limiting protrusion is provided on the bottom of the lower sealing block. The limiting protrusion is embedded between adjacent limiting blocks.

10. The energy-saving thermal break aluminum door and window according to claim 1 is characterized by: The bottom surfaces of the inner window frame and the outer window frame are both provided with outwardly protruding reinforcing ribs.

Citation Information

Patent Citations

  • Energy-saving broken bridge aluminum door and window

    CN113802955A