Passive aluminum alloy door and window and concealed fan type inward opening window sash assembling method thereof

Abstract

The application discloses a passive aluminum alloy door and window and an assembling method of a hidden-sash inward-opening window sash thereof, and belongs to the technical field of aluminum alloy door and window. The window sash comprises a window frame, a window mullion profile arranged in the middle of the window frame, and a hidden-sash inward-opening window sash connected to the window frame through a hinge. The hidden-sash inward-opening window sash comprises an upper frame, a side frame, a lower frame and window sash glass spliced into a frame type. The upper frame, the side frame and the lower frame each comprise an inward-opening sash aluminum profile. A nylon profile is clamped on the inward-opening sash aluminum profile. A glass supporting strip is further clamped on the inward-opening sash aluminum profile of the lower frame. The nylon profile and the glass supporting strip of the lower frame are used for jointly supporting the window sash glass. The structure discards the traditional external glass pressing strip, adopts the combination of the inward-opening sash aluminum profile and the clamped nylon profile, and makes the outer facade free of visible pressing lines after the window sash is closed, so that the 'hidden-sash' minimal effect that the fixed glass and the opening sash are completely consistent in appearance is realized. Meanwhile, the glass supporting strip bears the main gravity load, avoids the long-term shearing of the structural glue, and significantly improves the safety and durability of the window sash.

Description

Technical Field

[0001] This invention relates to the field of passive aluminum alloy windows, and more particularly to a passive aluminum alloy door and window and its method for assembling a concealed inward-opening window sash. Background Technology

[0002] Passive windows and doors are used in ultra-low energy buildings, requiring significantly higher thermal insulation and airtightness than conventional windows and doors. As passive building technology matures, the market demand for minimalist window and door designs is increasing, with concealed sash designs becoming a key trend. These designs urgently need to achieve high aesthetics and visual consistency while meeting stringent energy-saving requirements.

[0003] In existing technologies, the visible surface of the opening sash profile in conventional passive windows is significantly larger than that of the fixed glass portion; while existing concealed sash windows mostly use an external glass strip structure, which may result in inconsistent profile widths between the fixed and opening parts, or require increasing the cantilever height, affecting the minimalist effect, making it difficult to simultaneously meet the dual requirements of passive houses for high performance and aesthetic consistency. Summary of the Invention

[0004] The purpose of this invention is to provide a passive aluminum alloy door and window and its concealed sash inward opening window assembly method, so as to solve the problem mentioned in the background art that the existing concealed sash passive windows are difficult to achieve a minimalist effect that makes the appearance of the opening sash completely consistent with that of the fixed glass exterior while ensuring ultra-low energy consumption performance.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a passive aluminum alloy door and window, comprising a window frame, a mullion profile disposed in the middle of the window frame, and a concealed inward-opening window sash connected to the window frame by hinges. The concealed inward-opening window sash includes an upper frame, side frames, a lower frame and window sash glass spliced ​​into a frame shape. The upper frame, side frames and lower frame each include an inward-opening aluminum profile, a nylon profile is snapped onto the inward-opening aluminum profile, and a glass support strip is snapped onto the inward-opening aluminum profile of the lower frame. The nylon profile and the glass support strip of the lower frame are used to jointly support the window sash glass.

[0006] Based on the preferred embodiment of this technical solution, the number of window sashes is set in three parallel intervals, and glass spacers are snapped onto the aluminum profile of the inward-opening sash, wherein the window sashes near the INDOOR area can fit with the glass spacers.

[0007] Based on the preferred embodiment of this technical solution, outdoor waterproof strips are respectively attached to the mullion profile and the window frame profile, wherein the window sash glass near the OUTDOOR area can be bonded to the outdoor waterproof strip.

[0008] Based on the preferred embodiment of this technical solution, an indoor waterproof strip is snapped onto the inward-opening aluminum profile. When the outdoor waterproof strip is attached to the window sash glass, the indoor waterproof strip can be attached to the window mullion profile or window frame profile.

[0009] Based on the preferred embodiment of this technical solution, intermediate pressure-equalizing adhesive strips are respectively snapped onto the window mullion profile and the window frame profile. The intermediate pressure-equalizing adhesive strips can overlap onto the nylon profiles. The outdoor waterproof adhesive strip, the indoor waterproof adhesive strip, and the intermediate pressure-equalizing adhesive strip work together to provide insulation for the INDOOR area.

[0010] Based on the preferred embodiment of this technical solution, the nylon profile has several cavity areas inside, the sealed space formed by the cavity areas can be used for heat preservation, and the cavity areas of the nylon profile can be used to place nylon profile corner brackets.

[0011] Based on the preferred embodiment of this technical solution, silicone structural adhesive can be filled between the inward-opening aluminum profile and the window sash glass, and the silicone structural adhesive is used to bond the inward-opening aluminum profile and the window sash glass.

[0012] Based on the preferred embodiment of this technical solution, polyurethane foam can be injected into the gap between the nylon profile and the window sash glass.

[0013] Based on the preferred embodiment of this technical solution, silicone sealant is provided between the window sash glass and the nylon profile in the OUTDOOR area.

[0014] In addition, the present invention also relates to a method for assembling a concealed-sash inward-opening window sash, comprising the following steps: S1: Assemble the inner opening aluminum profiles of the upper frame, side frame and lower frame at a 45-degree angle, connect and fix them with connectors, and then snap on the indoor waterproof strip. S2: Attach the glass spacer strip to the inward-opening aluminum profile; S3: Install glass support strips on the inner opening aluminum profile of the lower frame; S4: Inject silicone structural adhesive into the gap between the inner side of the inward-opening aluminum profile and the glass spacer strip, with the structural adhesive slightly higher than the height of the glass spacer strip. S5: Place the window sash glass inside the window sash after the structural adhesive has been applied, and press it onto the glass support strip of the lower frame; S6: Wait for the silicone structural adhesive to solidify, then assemble the nylon profile at a 45-degree angle and snap it onto the inward-opening aluminum profile; S7: Inject polyurethane foam into the gap between the nylon profile and the window sash glass, and apply silicone sealant between the window sash glass and the nylon profile in the OUTDOOR area. S8: Install the hardware after all the sealant has cured.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. By using a concealed fan structure without external pressure strips, the appearance of the operable fan is completely consistent with that of the fixed glass exterior, achieving a minimalist aesthetic effect while avoiding visual discontinuity caused by differences in profile width.

[0016] 2. The use of glass support strips for load-bearing and silicone structural adhesive bonding, combined with triple sealing and multi-cavity nylon profiles, significantly improves the airtightness, thermal insulation and structural durability of the entire window, meeting the stringent performance requirements of passive buildings. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of one embodiment of a passive aluminum alloy door and window and its concealed-sash inward-opening window assembly method according to the present invention. Figure 2 This is a schematic diagram of the side frame and window mullion profile structure of the present invention; Figure 3 This is a diagram showing the side frame and window mullion profile of the present invention in their open state. Figure 4 This is a schematic diagram of the lower frame and window frame structure of the present invention; Figure 5 This is a diagram showing the open state of the lower frame and window frame of the present invention; Figure 6 A schematic diagram of a commonly used concealed sash window structure on the market; Figure 7 A schematic diagram showing the width of the fixed glass frame for a window with a standard overlapping method; Figure 8 This is a schematic diagram showing the width of the frame of a window with an operable sash, using a standard overlapping method.

[0018] Explanation of reference numerals in the attached drawings: 1. Window mullion profile; 11. Intermediate pressure equalization strip; 121. Outdoor waterproof strip; 122. Indoor waterproof strip; 2. Inward opening aluminum profile; 21. Silicone structural adhesive; 22. Glass gasket; 23. Window sash glass; 24. Polyurethane foam; 25. Silicone sealant; 26. Nylon profile; 27. Nylon profile corner bracket; 31. Glass support strip; 32. Window frame profile; 51. Window frame; 53. Concealed inward opening window sash; 531. Top frame; 532. Side frame; 533. Bottom frame; 61. Outer edge. Detailed Implementation

[0019] Ultra-low energy buildings, also known as passive buildings, aim to achieve high comfort and extremely low energy consumption throughout the year by minimizing active energy consumption through high-performance design of the building envelope. In this system, windows and doors, as the most thermally sensitive part of the building envelope, directly determine whether the entire building meets passive building standards based on their insulation and airtightness. Therefore, passive windows and doors must possess comprehensive performance indicators far exceeding those of conventional products. They must not only effectively block heat loss from the interior in winter and significantly suppress heat transfer from the exterior in summer, but also maintain a tight seal under complex conditions such as wind pressure, temperature differences, and humidity variations to prevent energy loss and condensation risks caused by air infiltration. With the development of passive building technology… With the global promotion of passive window and door design concepts and the increasing maturity of related technologies, the market's understanding of passive windows and doors has gradually shifted from focusing solely on energy-saving parameters to a comprehensive consideration of the overall product quality. This is especially true in high-end residential buildings, premium public buildings, and urban renewal projects, where architects and end-users are placing higher demands on the visual presentation of building facades, emphasizing a simple, clean, and integrated design language, and rejecting the visual disjointedness caused by the structural differences in traditional windows and doors. Against this backdrop, "hidden sash windows and doors" have rapidly become the mainstream aesthetic trend in the market. Their core requirement is that, from the outside, the operable sash, when closed, must be completely consistent with the fixed glass area in terms of outline, proportion, surface flatness, and material presentation, making it impossible to distinguish the operable portion, thus creating a continuous, transparent, and seamless visual effect. Disruptions to the building's facade aesthetics; however, current technology faces a fundamental contradiction in achieving this aesthetic goal—traditional high-performance passive windows, to meet stringent insulation and airtightness requirements, often require wider profile sections in the operable sash area to accommodate multiple sealing structures, thermal break bridges, and hardware installation space, resulting in the operable sash being significantly larger than the fixed portion, disrupting the overall uniformity of the facade; to compensate for this deficiency, some existing concealed sash window solutions attempt to hide structural differences by extending and covering them with external decorative strips or sealing strips, but such approaches usually require raising the window frame or mullion, which in turn causes inconsistencies in the overall width or layering between the fixed and operable areas, failing to truly achieve "concealed sash"; other solutions forcibly unify the exterior... While the dimensions may appear impressive, limited internal space often sacrifices the integrity of the sealing path or the effectiveness of the insulation structure, leading to a decline in the overall thermal performance of the window and making it difficult to meet the extreme performance thresholds required for passive house certification. More importantly, many designs that pursue a minimalist appearance fail to simultaneously optimize the internal stress and sealing logic while simplifying the external structure. For example, they may over-rely on adhesive materials to bear the glass load or fail to establish a reliable alternative load-bearing mechanism after eliminating the traditional compression structure. Over the long term, this can easily lead to safety hazards due to material aging, creep, or fatigue. At the same time, if the sealing system is not designed in conjunction with the new window sash form, thermal bridges or airflow channels may form at critical nodes, causing the actual performance of the window to be far lower than the theoretical value, failing to meet the stringent requirements of passive buildings for long-term stability.Furthermore, existing concealed sash structures often suffer from poor consistency in manufacturing and assembly due to complex processes and difficulties in tolerance control, further impacting both performance and aesthetics. In summary, the industry urgently needs an innovative technological approach that can completely eliminate the visual difference between the operable sash and the fixed portion, achieving a truly minimalist concealed sash effect, while also fully guaranteeing and even improving the overall performance of passive doors and windows in terms of insulation, airtightness, structural safety, and durability. However, due to the inherent conflict between high performance and high aesthetics under traditional construction logic, the market currently lacks an integrated solution that can simultaneously meet the extreme performance standards of passive houses and the minimalist aesthetic demands of modern architecture. Such products remain in a significant market gap, possessing urgent technological breakthrough value and broad industrialization prospects.

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1-5 The present invention provides an embodiment of a passive aluminum alloy door and window, including a window frame 51, a window mullion profile 1 disposed in the middle of the window frame 51, and a concealed inward opening window sash 53 connected to the window frame 51 by hinges. The concealed inward opening window sash 53 includes an upper frame 531, a side frame 532, a lower frame 533 spliced ​​into a frame shape, and a window sash glass 23. The upper frame 531, the side frame 532, and the lower frame 533 each include an inward opening aluminum profile 2. A nylon profile 26 is snapped onto the inward opening aluminum profile 2. A glass support strip 31 is also snapped onto the inward opening aluminum profile 2 of the lower frame 533. The nylon profile 26 and the glass support strip 31 of the lower frame 533 are used to jointly support the window sash glass 23. This structure abandons the traditional external glass pressure strip and adopts a combination of inward-opening aluminum profile 2 and snap-fit ​​nylon profile 26, so that there is no visible pressure line on the exterior facade after the window sash is closed, achieving a minimalist "hidden sash" effect where the appearance of the fixed glass and the opening sash is completely consistent with the exterior. At the same time, the glass support strip 31 bears the main gravity load, avoiding long-term shearing of the structural adhesive, significantly improving the safety and durability of the window sash, and meeting the dual requirements of passive buildings for high performance and high aesthetics.

[0022] Please see Figure 2-3A further solution based on this embodiment is as follows: the window sash glass 23 has a triple-glazed, two-gauge structure to ensure that the thermal insulation and sound insulation performance of the glass are simultaneously improved to meet the requirements of passive insulation. A glass spacer 22 is snapped onto the inward-opening aluminum profile 2, and the window sash glass 23 near the INDOOR area can fit snugly against the glass spacer 22. Triple-glazed, two-gauge means three layers of glass with gaps between adjacent glass layers, thus achieving the effect of triple-glazed, two-gauge.

[0023] Please see Figure 2-3 A further solution based on this embodiment is as follows: Outdoor waterproof strips 121 are respectively attached to the mullion profile 1 and the window frame profile 32 51, wherein the window sash glass 23 near the OUTDOOR area can adhere to the outdoor waterproof strip 121. Since there is no pressure strip on the outdoor side of the window sash, the outdoor waterproof strip 121 on the window frame 51 or mullion directly overlaps and seals with the glass edge, ensuring a completely uniform outdoor sealing form between the operable sash and the fixed part. This guarantees excellent water tightness while maintaining aesthetic consistency, solving the aesthetic defects caused by structural differences in existing concealed sash windows.

[0024] Please see Figure 4-5 A further solution based on this embodiment is as follows: an indoor waterproof strip 122 is snapped onto the inward-opening aluminum profile 2. When the outdoor waterproof strip 121 is attached to the window sash glass 23, the indoor waterproof strip 122 can be attached to the window mullion profile 1 or the window frame profile 32. When the window sash is closed, the indoor waterproof strip 122 is pressed and sealed to the fixed frame, forming a reliable indoor sealing barrier, effectively blocking indoor and outdoor air infiltration, and further improving the overall airtightness of the window.

[0025] Please see Figure 4-5 A further solution based on this embodiment is as follows: Intermediate pressure-equalizing strips 11 are respectively snapped onto the window mullion profile 1 and the window frame profile 32. These intermediate pressure-equalizing strips 11 can overlap the nylon profile 26. The outdoor waterproof strip 121, the indoor waterproof strip 122, and the intermediate pressure-equalizing strip 11 work together to insulate the INDOOR area. This triple-seal design effectively balances the cavity pressure and significantly reduces air permeability. The stepped structure on the outer side of the nylon profile 26 is specifically designed for overlap with the pressure-equalizing strip, ensuring continuous sealing and achieving an ultra-low heat transfer coefficient, meeting the performance standards for passive windows and doors.

[0026] Please see Figure 2-5 A further solution based on this embodiment is as follows: the nylon profile 26 has several cavity areas inside, and the sealed space formed by the cavity areas can be used for heat insulation. The cavity areas of the nylon profile 26 can accommodate the corner brackets of the nylon profile 26. The multi-cavity structure significantly improves the thermal insulation performance of the nylon profile 26 itself and reduces heat conduction. The use of nylon corner brackets at a 45-degree angle ensures accurate dimensions and a flat appearance after assembly, supporting the minimalist aesthetics of the concealed fan.

[0027] Please see Figure 2-5 A further solution based on this embodiment is as follows: Silicone structural adhesive 21 can be filled between the interior of the inward-opening aluminum profile 2 and the glass spacer 22, as well as between the window sash glass 23. Silicone structural adhesive 21 is used to bond the inward-opening aluminum profile 2 and the window sash glass 23. Using silicone structural adhesive 21 achieves structural bonding between the glass and the aluminum profile, eliminating the need for mechanical pressure plates, simplifying the construction, enhancing overall rigidity, and adapting to the installation requirements of large-pane glass.

[0028] Please see Figure 2-5 A further solution based on this embodiment is that polyurethane foam 24 can be injected into the gap between the nylon profile 26 and the window sash glass 23. The polyurethane foam 24 fills the gap between the nylon profile 26 and the glass, forming a continuous insulation layer, eliminating local cold bridges, and helping to fix the glass position, thereby improving the overall thermal insulation capacity of the window sash.

[0029] Please see Figure 2-5 A further solution based on this embodiment is as follows: a silicone sealant 25 is provided between the window sash glass 23 and the nylon profile 26 in the OUTDOOR area. The silicone sealant 25 has excellent weather resistance and is used for sealing the exterior edge. It can resist ultraviolet rays, temperature difference deformation and wind and rain erosion for a long time, ensuring that the concealed sash structure maintains its sealing integrity throughout its entire life cycle.

[0030] The present invention also relates to a method for assembling a concealed inward-opening window sash 53, comprising the following steps: S1: Assemble the inward-opening aluminum profiles 2 of the upper frame 531, side frame 532, and lower frame 533 at a 45-degree angle, and connect and fix them with connectors, then snap on the interior waterproofing strip 122. This step first completes the precise angle assembly and fixation of the aluminum profile frame, providing stable support for subsequent glass installation; the interior waterproofing strip 122 is installed to ensure reliable sealing, and at the same time lays the foundation for the window frame 51 to form an effective sealing surface; S2: Attach the glass spacer strip 22 to the inward-opening aluminum profile 2. The glass spacer strip 22 is used to position and cushion the innermost glass. S3: Install glass support strip 31 on the inward-opening aluminum profile 2 of the lower frame 533. The glass support strip 31 bears the main gravity load of the window sash glass 23, effectively transferring the weight of the glass to the aluminum profile frame, preventing the silicone structural adhesive 21 from failing due to long-term shear force, and significantly improving the structural safety and durability of the window sash for long-term use; S4: Place the window sash glass 23 on the glass pad 22 that makes up the frame, and inject silicone structural adhesive 21 into the gap between the inner side of the inward opening aluminum profile 2 and the glass pad 22. The structural adhesive is slightly higher than the height of the glass pad (22). S5: Place the window sash glass (23) inside the window sash after applying structural adhesive, and press it onto the glass support strip (31) of the lower frame; the glass pad strip (22) serves to position and seal the window sash glass (23), and the silicone structural adhesive (21) serves to bond the inward-opening aluminum profile (2) and the window sash glass (23); by drawing on the curtain wall opening sash process, a firm fixation without mechanical pressure plates is achieved; this method not only simplifies the structure, but also adapts to the installation of large-size glass, while ensuring the overall rigidity and sealing continuity of the window sash; S6: Wait for the silicone structural adhesive 21 to cure, then assemble the nylon profile 26 at a 45-degree angle and snap it onto the inward-opening aluminum profile 2. The nylon corner brackets ensure accurate external dimensions. S7: Polyurethane foam 24 is injected into the gap between the nylon profile 26 and the window sash glass 23. Silicone sealant 25 is applied between the window sash glass 23 and the nylon profile 26 in the OUTDOOR area. The polyurethane foam 24 fills the cavity gaps, forming an additional insulation layer and reducing heat conduction; silicone sealant 25 is used to finish the edges on the outdoor side, as its excellent weather resistance can withstand wind, rain, and ultraviolet rays for a long time. S8: Install the hardware after all the sealant has cured. Installing the hardware last avoids damage to the cured sealant or glass during construction; it also ensures a stable installation base for the hardware, which here refers to hinges and handles.

[0031] Please refer to Figure 3 and Figure 6 The outer edge 61 of this product has a size of A1, while the outer edge 61 of a commonly used hidden window structure has a size of A2. The size of A1 in this structure is significantly smaller than the size of A2, which reduces the obstruction of the outer edge 61 and improves the aesthetics.

[0032] Please refer to Figure 7 and Figure 8 In this common overlapping window structure, the profile size B2 of the operable window is significantly larger than the fixed glass portion B1, which lacks aesthetic appeal.

[0033] Working Principle: In the closed state, the passive aluminum alloy window and door of this invention features a concealed inward-opening window sash 53 that is hinged and embedded into the inner side of the window frame 51, achieving a minimalist visual effect. The concealed inward-opening window sash 53 adopts a design without an exterior glass pressure strip, and there is no profile obstruction on the exterior side. The exterior waterproof strip 121 on the window frame 51 and the mullion profile 1 directly adheres to the outer edge of the window sash glass 23 to form the first seal. When the window sash is closed, the interior waterproof strip 122 on the inward-opening aluminum profile 2 presses against the surface of the window frame 51 or the mullion to form the second seal. At the same time, the middle pressure-equalizing strip 11 on the side of the window frame 51 overlaps with the outer step of the nylon profile 26 to form the third seal. The three seals work together to effectively block air infiltration and significantly improve air tightness and thermal insulation performance. The window sash glass 23 is primarily supported by the glass support strip 31 on the lower frame 533, and structurally bonded to the inward-opening aluminum profile 2 via silicone structural adhesive 21, ensuring wind pressure resistance stability. The nylon profile 26 is snapped onto the inner side of the aluminum profile; its multi-cavity structure and the polyurethane foam 24 filling the gaps with the glass further block thermal bridges, while the silicone sealant 25 on the exterior side ensures long-term weather-resistant sealing. Through the above structure and assembly process, the entire window achieves high aesthetics, high airtightness, low heat transfer coefficient, and structural safety simultaneously, eliminating the need for traditional external pressure strips, meeting the comprehensive performance requirements of passive ultra-low energy buildings for doors and windows. Here, OUTDOOR refers to the exterior, and INDOOR refers to the interior.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A passive aluminum alloy door and window, comprising a window frame (51) and a window mullion profile (1) disposed in the middle of the window frame (51), characterized in that: It also includes a concealed inward-opening window sash (53) connected to the window frame (51) by hinges. The concealed inward-opening window sash (53) includes an upper frame (531), a side frame (532), a lower frame (533) and a window sash glass (23) spliced ​​into a frame shape. The upper frame (531), the side frame (532) and the lower frame (533) each include an inward-opening aluminum profile (2). A nylon profile (26) is snapped onto the inward-opening aluminum profile (2). A glass support strip (31) is also snapped onto the inward-opening aluminum profile (2) of the lower frame (533). The nylon profile (26) and the glass support strip (31) of the lower frame (533) are used to support the window sash glass (23) together.

2. The passive aluminum alloy door and window according to claim 1, characterized in that: The window sash glass (23) has a triple-glazed, double-opening structure. The inward-opening aluminum profile (2) is fitted with a glass gasket (22), and the window sash glass (23) near the INDOOR area can fit with the glass gasket (22).

3. The passive aluminum alloy door and window according to claim 2, characterized in that: Outdoor waterproof strips (121) are attached to the mullion profile (1) and the window frame profile (32), respectively. The window sash glass (23) near the OUTDOOR area can be attached to the outdoor waterproof strips (121).

4. The passive aluminum alloy door and window according to claim 3, characterized in that: An indoor waterproof strip (122) is attached to the aluminum profile (2) of the inward opening fan. When the outdoor waterproof strip (121) is attached to the window sash glass (23), the indoor waterproof strip (122) can be attached to the window mullion profile (1) or the window frame profile (32).

5. The passive aluminum alloy door and window according to claim 4, characterized in that: Intermediate pressure strips (11) are respectively attached to the window mullion profile (1) and the window frame profile (32). The intermediate pressure strips (11) can overlap the nylon profile (26). The outdoor waterproof strips (121), the indoor waterproof strips (122), and the intermediate pressure strips (11) work together to insulate the INDOOR area.

6. The passive aluminum alloy door and window according to claim 5, characterized in that: The nylon profile (26) has several cavity areas inside. The sealed space formed by the cavity areas can be used for heat preservation. The cavity areas of the nylon profile (26) can be used to place nylon profile corner brackets (27).

7. The passive aluminum alloy door and window according to claim 6, characterized in that: Silicone structural adhesive (21) can be filled between the inward-opening aluminum profile (2) and the window sash glass (23). The silicone structural adhesive (21) is used to bond the inward-opening aluminum profile (2) and the window sash glass (23).

8. The passive aluminum alloy door and window according to claim 6, characterized in that: Polyurethane foam (24) can be injected into the gap between the nylon profile (26) and the window sash glass (23).

9. The passive aluminum alloy door and window according to claim 6, characterized in that: Silicone sealant (25) is provided between the window sash glass (23) and the nylon profile (26) in the OUTDOOR area.

10. A method for assembling a concealed-sash inward-opening window sash, characterized in that: Includes the following steps: S1: The inner opening aluminum profiles (2) of the upper frame (531), side frame (532) and lower frame (533) are angled at 45 degrees and connected and fixed with connectors, and then the indoor waterproof strip (122) is snapped on. S2: Attach the glass spacer strip (22) to the inward-opening aluminum profile (2); S3: Install glass support strips (31) on the inner opening aluminum profile (2) of the lower frame (533); S4: Place the window sash glass (23) on the glass spacer (22) that makes up the frame, and inject silicone structural adhesive (21) into the gap between the inner side of the inward opening aluminum profile (2) and the glass spacer (22). The structural adhesive is slightly higher than the height of the glass spacer (22). S5: Place the window sash glass (23) inside the window sash after applying structural adhesive, and press it onto the glass support strip (31) of the lower frame; S6: Wait for the silicone structural adhesive (21) to solidify, then assemble the nylon profile (26) at a 45-degree angle and attach it to the inward-opening aluminum profile (2); S7: Inject polyurethane foam (24) into the gap between the nylon profile (26) and the window sash glass (23), and apply silicone sealant (25) between the window sash glass (23) and the nylon profile (26) in the OUTDOOR area. S8: Install the hardware after all the sealant has cured.

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