Environment-friendly energy-saving construction structure for building transformation and construction method of environment-friendly energy-saving construction structure

Abstract

The invention relates to an environment-friendly energy-saving construction structure for building reconstruction and a construction method thereof.The environment-friendly energy-saving construction structure comprises a reconstruction unit, the reconstruction unit comprises a mounting frame, at least one film separation layer capable of being telescopically rolled up and down and an adjusting assembly, the mounting frame is fixed to the inner side of an existing window sash in a sealed mode, and a glass window sash is arranged on the mounting frame; a closed air cavity interlayer is formed between the glass window sash and the existing window sash, and the film separation layer is arranged in the air cavity interlayer. The top of the thin film separation layer is connected with the storage part and can be rolled on the storage part, and the end, away from the storage part, of the thin film separation layer is in transmission connection with the adjusting assembly, so that the thin film separation layer is unfolded in the air cavity interlayer to divide the cavity, or the thin film separation layer is rolled through the elastic storage part to merge the cavity. The construction is convenient and fast, the period is short, the cost is low, the structure is stable, multiple sealing is reliable, heat preservation and lighting can be dynamically adjusted, and minimum intervention transformation of old buildings is achieved.

Description

Technical Field

[0001] This invention relates to the field of energy-saving renovation technology for existing buildings, specifically to a green and energy-saving construction structure and its construction method for building renovation. Background Technology

[0002] Building energy-saving renovation is a comprehensive renovation project that reduces energy consumption and improves green and environmentally friendly performance by upgrading the building envelope, air conditioning, heating, ventilation, lighting, power supply and distribution, and hot water supply systems through technological upgrades and structural optimization. Among them, the renovation of doors and windows in the building envelope is the core link. As the main channel for heat exchange in a building, the insulation, sealing and lighting performance of doors and windows directly affect the overall energy-saving effect of the building. In particular, the doors and windows of existing buildings (such as old residential areas, old apartments and old office buildings) have been used for a long time and generally have problems such as poor insulation, air leakage and water seepage, and contradiction between lighting and energy saving, which have become the focus and difficulty of energy-saving renovation.

[0003] Existing energy-saving renovation technologies for building doors and windows mainly fall into the following categories: One is fixed energy-saving window renovation, such as replacing with Low-E double-glazed windows or multi-pane windows, which increases thermal resistance by increasing the number of glass layers or using special coatings. However, this type of solution has a fixed thermal resistance and cannot dynamically adapt to the needs of insulation and lighting according to the season and weather. Moreover, the multi-pane structure is heavy and can easily increase the load on the walls of old buildings. Construction requires the removal of the original windows, which damages the original structure and generates a lot of construction waste. Another type is adjustable insulated doors and windows. For example, patent "CN118128410B" discloses an energy-saving building door and window with adjustable thermal insulation strength. It extends the heat conduction path by increasing the thickness of the vacuum layer between the two panes of glass, thereby improving the thermal insulation effect. However, this type of solution relies on a vacuum environment and requires professional equipment to maintain the vacuum in the chamber. This is difficult to achieve on-site in existing building renovations. Furthermore, the vacuum glass seal is prone to failure, the cost is high, and the weight far exceeds the load-bearing limit of the walls of old buildings.

[0004] Therefore, it is necessary to study a green and energy-saving construction structure and its construction method for building renovation. Summary of the Invention

[0005] In view of this, the purpose of this invention is to provide a green and energy-saving construction structure and construction method for building renovation, which effectively solves the problems of existing structures that either cause great construction damage, or are difficult to balance lightweight and thermal insulation performance, or have conflicting dynamic adjustment structures and sealing performance, and cannot meet the core requirements of lightweight, low cost and dynamic adaptation for existing building renovation.

[0006] To achieve the above objectives, the technical solution adopted by this invention is: a green and energy-saving construction structure for building renovation, comprising a renovation unit, wherein the renovation unit includes an installation frame, at least one retractable thin-film partition layer in the vertical direction, and an adjustment component; the installation frame is sealed and fixed to the inner side of the existing window sash, and a glass window sash is provided on the installation frame, forming a closed air cavity between the glass window sash and the existing window sash; at least one thin-film partition layer is disposed within the air cavity; guide rails are provided on the left and right sides of the installation frame, and the thin-film partition layer is fixed on the left and right sides. A slider is adapted to slide and slide on a guide rail; the top of the mounting frame is provided with an elastic storage component, the top of the film separator is connected to the storage component and can be rolled up on the storage component, and the end of the film separator away from the storage component is connected to a traction rope, which is connected to an adjustment component; the adjustment component is located on one side of the mounting frame, and the adjustment component is used to drive the traction rope to pull the film separator up and down along the length of the guide rail, so that the film separator unfolds in the air cavity interlayer to divide the chamber, or the elastic storage component rolls up the film separator to merge the chambers.

[0007] Furthermore, the top of the mounting frame is provided with a mounting cavity, and the storage component is rotatably installed in the mounting cavity. The storage component is a scroll, and a torsion spring is fixedly sleeved on the scroll. One end of the torsion spring is fixedly connected to the scroll, and the other end is fixedly connected to the cavity wall of the mounting cavity. The top of the thin film separator is wound and fixed on the scroll.

[0008] Furthermore, a docking strip is fixed to the end of the film separator away from the storage component, and a traction rope is connected to the bottom of the docking strip. The output end of the traction rope extends through the mounting frame to its outer side and is connected to the adjustment component for transmission.

[0009] Furthermore, a side groove is provided on the outer side wall of the mounting frame, and the adjustment component is disposed in the side groove. The adjustment component includes a bracket and a rope wheel. The bracket is fixed to the bottom of the side groove, and the rope wheel is rotatably mounted on the bracket. The output end of the traction rope is fixedly wound around the rope wheel, and the rope wheel is driven to rotate, which pulls the film separator layer open under the action of the traction rope.

[0010] Furthermore, a locking element is provided in the side groove, which is used to restrict the reverse rotation of the rope wheel when the film separator layer is pulled to a preset unfolding position.

[0011] Furthermore, there are two thin film separating layers, including a first separating layer and a second separating layer. Each separating layer is equipped with a slider, a traction rope, and an adjustment component. When the two separating layers are fully extended, the closed air cavity interlayer can be divided into three independent and sealed sub-chambers.

[0012] Furthermore, the film separator is a light-transmitting PET film, and the film surface is provided with an anti-aging coating and an anti-scratch coating.

[0013] Furthermore, a pair of rollers is provided below the storage component. The pair of rollers are symmetrically rotated and assembled in the mounting cavity at the top of the mounting frame, and elastically clamped on the front and rear sides of the film separator layer to guide the film separator layer to be smoothly wound or unwound.

[0014] This invention also provides a green and energy-saving construction method for building renovation, comprising the following steps: Steps: Pre-treatment of existing window sashes; Clean the outer surface of existing window sashes, remove the aged sealing layer, and install an elastic buffer pad layer on the inner side of the outer window frame of the existing window sashes; Step 2: Modification unit assembly; Customize the modification unit according to the size of the existing window sash, and fix the installation frame to the inside of the existing window sash in a close fit and seal, so that the glass window sash is parallel to the existing window sash and forms a closed air cavity interlayer. Step 3: Fill the connection between the installation frame and the existing window sash with sealant to form a complete seal; Step 4: By adjusting the component to drive the expansion and contraction of the partition layer, verify the function of switching the partition state of the air cavity interlayer, test the sealing performance and thermal resistance adjustment effect, and ensure that there is no air leakage or water seepage.

[0015] The beneficial effects of the above technical solution are as follows: The green and energy-saving construction structure and construction method for building renovation provided by this invention are convenient to construct, have low cost, reliable sealing, stable structure, and short construction cycle; the use of general-purpose materials results in low cost, and the lightweight design is suitable for the load-bearing capacity of old buildings; the structure is stable and durable, with multiple reliable seals, effectively solving the problem of air leakage; it can also dynamically adjust heat preservation and lighting, combining practicality and economy, and has significant promotional value.

[0016] Traditional fixed energy-saving windows, such as Low-E insulated glass, cannot simultaneously achieve both heat insulation and light transmission, and their thermal resistance remains fixed. Existing vacuum glass retrofit solutions rely on a vacuum environment, resulting in high costs, heavy weight, and poor adaptability. Existing adjustable doors and windows have conflicting sealing performance and moving structures, and require the removal of the original windows during construction. This invention dynamically switches thermal resistance and light transmittance through the design of a thin-film separator layer to adapt to the usage needs of different seasons and weather conditions. In winter, the separator layer is unfolded to form a multi-layered air cavity to enhance heat insulation, while in spring and autumn, the film is retracted to ensure light transmission, effectively avoiding the functional limitations of a single structure.

[0017] Meanwhile, this invention maximizes the preservation of the existing building envelope, only adding new renovation units without removing the original glass or window frames. Construction involves no wall demolition or large-scale cutting, while avoiding increasing the burden on the walls and window frames. It adapts to the existing structure of old buildings, and the overall construction structure conforms to the principle of minimal intervention in the renovation of old buildings, while reducing the disturbance to residents during construction.

[0018] The multi-film separator layer of this invention can transform a single large air cavity into multiple independent small chambers. Compared with the traditional method of increasing the number of glass layers to improve thermal resistance, this invention structurally suppresses heat convection and achieves thermal resistance superposition. When there is a temperature difference between the inside and outside of the chamber, the air will form a convection circulation due to the density difference. By dividing the chambers into independent chambers, the air cannot form an effective convection circulation and can only transfer heat through slow heat conduction. By superimposing the thermal resistance of each independent chamber, the thermal insulation effect is effectively improved. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the implementation structure of the energy-saving construction structure of the present invention; Figure 2 This is a schematic diagram of the external structure of the modified unit of the present invention; Figure 3 This is a schematic diagram of the internal cross-sectional structure of the modified unit of the present invention; Figure 4 for Figure 3 Enlarged structural diagram at point B; Figure 5 This is a top-section structural diagram of the modified unit of the present invention; Figure 6 This is a schematic diagram of the implementation structure of the regulating component of the present invention; Figure 7 This is a schematic diagram of one embodiment of the locking component of the present invention; Figure 8 This is a schematic diagram of the actual assembly structure of the energy-saving construction structure of the present invention.

[0020] Reference numerals: 1-Existing window sash, 11-Outer window frame, 12-Old glass, 2-Renovation unit, 21-Mounting frame, 22-Window sash, 23-First partition layer, 24-Second partition layer, 25-First roller, 26-Second roller, 27-Roller pair, 28-Air cavity interlayer, 281-First cavity, 282-Second cavity, 283-Third cavity, 29-Side groove, 3-Adjustment assembly, 31-Guide rail, 32-Slider, 33-First pulley, 34-Second pulley, 35-Bracket, 36-Traction rope, 37-Adjustment hole, 38-Locking component. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Example 1: This example aims to provide a green and energy-saving construction structure for building renovation. It is mainly used to solve the problems of large construction damage, contradiction between heat preservation and lighting, and limited load-bearing capacity of the main wall in the existing renovation of the building envelope of old residential buildings. The present invention mainly focuses on the renovation of the window sash in the building envelope, so as to achieve renovation without removing the outer window frame and old glass of the existing window sash, without damaging the original interior and exterior decoration of the building, with less interference to residents' lives, and low cost of renovation construction.

[0022] like Figure 1-8 As shown, the green and energy-saving construction structure for building renovation provided in this embodiment includes a renovation unit 2. The renovation unit 2 includes an installation frame 21, at least one film partition layer that can be extended and retracted in the vertical direction, and an adjustment component 3. The existing window sash 1 is the original window frame and single-layer tempered glass structure of the old building, most commonly a sliding window. The renovation unit 2 is sealed and fixed to one side of the existing window sash 1 and moves and slides with the original window sash 22.

[0023] The existing window sash 1 is pre-treated to make it flat. Then, the size of the renovation unit is customized according to the size of the existing window sash. The installation frame 21 of the renovation unit is sealed and fixed to the surface of the original outer window frame 11. The installation frame 21 is made of thermally broken aluminum alloy profile and the overall size is customized according to the opening size of the existing window sash 1. The glass window sash 22 is fixed in the installation frame 21 by sealing groove and silicone sealant, so that a closed air cavity interlayer 28 is formed between the glass window sash 22 of the renovation unit 2 and the old glass 12.

[0024] like Figure 2-5 As shown, two independent mounting cavities are formed at the top of the mounting frame 21, corresponding to two thin-film separator layers. In this embodiment, there are two thin-film separator layers: a first separator layer 23 and a second separator layer 24. A storage component is rotatably mounted within each mounting cavity. In this embodiment, the storage component includes a first reel and a second reel, which are rotatably mounted in their respective mounting cavities via mounting bases. Each reel is fixedly fitted with a torsion spring (not shown in the figure) to drive the reel to rotate in the opposite direction and reset. A slot is provided at the bottom of the mounting cavity. The tops of the first separator layer 23 and the second separator layer 24 are respectively wound and fixed onto their corresponding reels, while their bottoms pass through the slot and can move downwards into the air cavity interlayer 28.

[0025] Furthermore, such as Figure 4As shown, in this embodiment, a set of rollers 27 are respectively provided below the first roll 25 and the second roll 26 (the structure of the rollers is existing technology and will not be described in detail here). The rollers 27 are located above the slots in each mounting cavity. The length of the rollers 27 is adapted to the width of the film separator layer, and the rollers 27 are clamped on the front and rear sides of the film separator layer by micro springs so that the film separator layer passes between the rollers 27. This is used to guide the smooth winding or unwinding of the film separator layer and avoid wrinkles or deviation. In this embodiment, both the first separator layer 23 and the second separator layer 24 are made of light-transmitting PRT film, and their outer surfaces are coated with an anti-aging coating and an anti-scratch coating, respectively, to ensure that they have heat preservation while also having a certain light transmission function.

[0026] like Figure 3 and 5 As shown, sliders 32 are fixed to the bottom of the left and right sides of the first partition layer 23 and the second partition layer 24, respectively. Correspondingly, guide rails 31 are installed vertically on the left and right sides of the mounting frame 21. The sliders 32 are adapted to slide within the guide rails 31 and can slide up and down along the length of the guide rails 31. Furthermore, a connecting strip is fixed to the end of the first partition layer 23 and the second partition layer 24 away from the roller by a pressure strip. A traction rope 36 is fixedly connected to the bottom center of the connecting strip. In this way, by pulling the two partition layers up and down, the air cavity interlayer 28 can be divided into three sub-chambers. By superimposing the thermal resistance of each independent chamber, the thermal insulation effect can be effectively improved.

[0027] like Figure 2 and 6 As shown, a side groove 29 is provided on the outer sidewall of the mounting frame 21. In this embodiment, the side groove 29 is a rectangular open cavity. Two sets of adjustment components 3 are arranged vertically and horizontally in the side groove 29 to drive each thin film partition layer. In the specific implementation structure, each set of adjustment components 3 includes a bracket 35, a first rope wheel 33 and a second rope wheel 34. The bracket 35 is fixed in the side groove 29. The first rope wheel 33 and the second rope wheel 34 are rotatably mounted on the bracket 35. An adjustment hole 37 is provided on the sidewall of the side groove 29 of the mounting frame 21. One end of the traction rope 36 is connected to the first partition layer 23 and the second partition layer 24 respectively. The other end passes through the adjustment hole 37 to the outside of the mounting frame 21 and is wound and fixed in the groove of the first rope wheel 33 and the second rope wheel 34 respectively. Therefore, by driving the corresponding rope wheel to rotate, the corresponding thin film partition layer is pulled by the traction rope 36, thereby realizing the division of the sub-cavities of the air cavity interlayer 28.

[0028] Additionally, after the sheave rotates and fully unfolds the film separator layer downwards, it can be locked and limited by the locking member 38 provided in the side groove 29. The locking member 38 can be a ratchet and pawl locking structure, in which the ratchet and sheave are fixed coaxially, the pawl is mounted on the bracket by rotating through a shaft, and one end of the pawl is provided with a reset force by a micro spring, so that the pawl is always in contact with the tooth groove of the ratchet. When the film separator layer is pulled to the preset unfolding position, the pawl is engaged in the tooth groove of the ratchet, restricting the reverse rotation of the sheave (not shown in the figure); or it can be, for example, the type in this embodiment. Figure 7 The locking structure shown in this embodiment includes a rectangular buckle 38. One end of the rectangular buckle is rotatably installed in the side groove 29, and the other end is provided with a barb structure. The barb structure can lock the handwheel on the rope wheel onto the rectangular buckle. When in use, the rectangular buckle is disengaged from the handwheel to engage and lock. When the driving film separator layer falls or is wound to the set position, the handwheel can be limited by the barb structure, making operation convenient.

[0029] It should also be noted that in practical applications, a sealing gasket is fixedly pasted on the mating surface of the mounting frame 21 and the outer window frame 11 of the existing window sash 1. The sealing gasket is continuously arranged without breaks along the outer perimeter of the mounting frame 21, and the gap between the two is filled with polyurethane foam. Neutral silicone weather-resistant sealant can also be further applied to the outside to form a double sealing mechanism to prevent air leakage. In addition, a sealing structure is also provided at the adjustment hole 37 in this invention. The structure and fixing method of the sealing structure are existing technologies and will not be described in detail here.

[0030] Furthermore, in practical applications, this embodiment takes sliding windows in old buildings as an example, such as... Figure 8 As shown, the modification unit 2 is installed on the indoor or outdoor side of the existing window sash 1, that is, the two sets of modification units 2 correspond to the left and right sliding sashes respectively. When the sliding window moves, the modification unit 2 follows synchronously without affecting the sliding of the window sash 22. In order to prevent the water vapor remaining in the air cavity interlayer from condensing into condensate under temperature difference conditions, a drainage channel can be further set at the bottom of the installation frame 21 of the modification unit 2, and a one-way drainage valve is set in the drainage channel. At the same time, the bottom surface of the installation frame is set with a certain micro slope, so that the condensate can be drained quickly and outdoor air and rainwater can be prevented from flowing back in, further ensuring the structural stability and sealing reliability of the modification unit.

[0031] In practical applications, when it is necessary to improve the indoor thermal insulation performance, the user can manually rotate the rope wheel in the side groove 29. When the rope wheel rotates, the traction rope 36 is wound up. The traction rope 36 pulls the docking strip and causes the film partition layer to slide down along the guide rail 31. At this time, the film partition layer is gradually released from the roll and is elastically clamped and guided by the roller 27. The slider 32 moves smoothly along the guide rail 31 to avoid deviation or wrinkles. When the film partition layer is fully unfolded (the bottom of the mounting frame 21 of the docking strip is attached), the rope wheel is locked by the locking member 38. After the two film partition layers are fully unfolded, the initial air cavity interlayer 28 can be divided into three independent and sealed sub-cavities, namely the first interlayer 281, the second interlayer 282 and the third interlayer 283. The thermal insulation effect is improved by superimposing the thermal resistance of the static air. Furthermore, according to the user's actual needs, only a single film partition layer can be unfolded to form two sub-cavities, thereby achieving a balance between thermal insulation and light transmission.

[0032] When it is necessary to improve the light transmission performance, the locking element 38 is unlocked, and the reel rotates in the opposite direction under the action of the torsion spring, automatically winding up the two film separator layers. At the same time, the traction rope 36 is gradually released as the film separator layers are wound up. At this time, the film separator layers slide upward along the guide rail 31 under the guidance of the roller 27, and are smoothly wound inside the reel, avoiding overlapping and wrinkles, until the connecting strip moves upward to the bottom position of the mounting cavity strip hole. At this time, the air cavity returns to a single chamber, meeting the light transmission requirements.

[0033] The green and energy-saving construction structure for building renovation provided in this embodiment achieves thermal resistance adjustment by dynamically increasing or decreasing the number of independent air chambers, replacing traditional energy-saving glass with fixed thermal resistance, and adapting to the special characteristics of existing building renovation; moreover, it does not require the removal of the outer window frame and old glass of the existing window sash, the construction generates no construction waste, has minimal impact on residents' lives, and meets the needs of energy-saving renovation.

[0034] Example 2, based on Example 1, provides a green and energy-saving construction method for building renovation, specifically including the following steps: Step 1: Pre-treatment of existing window sashes; Clean the inner surface of existing window sashes to remove dust, oil stains and aged sealant, ensuring that the bonding surface is clean and dry and free of impurities. Then, continuously apply the sealing buffer pad layer along the inner edge of the old glass. Step 2: Customize the modification unit according to the size of the existing window sash, and then attach the installation frame of the modification unit to the outer surface of the existing window sash. During construction, first use L-shaped stainless steel corner brackets for positioning to ensure that the glass window sash is parallel to the old glass and that the installation frame is compatible with the old window frame. Step 3: Fill the gap between the installation frame and the outer window frame with polyurethane foam. After the foam fills the gap, smooth it out and let it stand for 20 minutes to fully cure. After curing, trim off the excess foam to ensure a smooth surface. Then, apply neutral silicone weather-resistant sealant along the outside of the mating surface. The surface should be smooth and free of bubbles to form a double sealing structure and block the air leakage channel. Step 4: Operate the first and second rope wheels respectively to verify the switching function of the two film separators in three states: fully unfolded, single unfolded, and fully rolled up. Ensure smooth sliding without jamming, offset, or wrinkles, and reliable locking of the locking parts. Test the sealing performance and thermal resistance adjustment effect to ensure no air leakage or water seepage, and meet the design requirements.

[0035] The embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. The basic concept of the present invention is to achieve thermal resistance adjustment by dynamically increasing or decreasing the number of independent air cavities, replacing traditional energy-saving glass with fixed thermal resistance, and adapting to the special characteristics of existing building renovations. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A green and energy-saving construction structure for building renovation, characterized in that: The modification unit (2) includes a mounting frame (21), at least one film separator that can be stretched and rolled up in the vertical direction, and an adjustment component (3). The mounting frame (21) is sealed and fixed to the inside of the existing window sash (1). A glass window sash (22) is provided on the mounting frame (21). A closed air cavity interlayer (28) is formed between the glass window sash (22) and the existing window sash (1). At least one thin film separator is provided in the air cavity interlayer (28). The mounting frame (21) is provided with guide rails (31) on the left and right sides, and the thin film separator is fixed with sliders (32) on the left and right sides. The sliders (32) are adapted to guide and slide on the guide rails (31). The top of the mounting frame (21) is provided with an elastic storage component. The top of the film separator layer is connected to the storage component and can be rolled up on the storage component. The end of the film separator layer away from the storage component is connected to a traction rope (36). The traction rope (36) is connected to the adjustment component (3) in a transmission connection. The adjustment component (3) is located on one side of the mounting frame (21). The adjustment component (3) is used to drive the traction rope (36) to pull the film separator layer up and down along the length direction of the guide rail (31), so that the film separator layer unfolds in the air cavity interlayer (28) to divide the cavity, or the film separator layer is rolled up by the elastic storage member to merge the cavity.

2. The green and energy-saving construction structure for building renovation according to claim 1, characterized in that: The top of the mounting frame is provided with a mounting cavity, and the storage component is rotatably installed in the mounting cavity. The storage component is a scroll, and a torsion spring is fixedly sleeved on the scroll. One end of the torsion spring is fixedly connected to the scroll, and the other end is fixedly connected to the cavity wall of the mounting cavity. The top of the thin film separator is wound and fixed on the scroll.

3. The green and energy-saving construction structure for building renovation according to claim 1, characterized in that: The end of the thin film separator away from the storage component is fixed with a docking strip, and the bottom of the docking strip is connected to a traction rope (36). The output end of the traction rope (36) extends through the mounting frame (21) to its outside and is connected to the adjustment component (3) in a transmission manner.

4. The green and energy-saving construction structure for building renovation according to claim 3, characterized in that: The mounting frame (21) has a side groove (29) on its outer side wall. The adjustment component (3) is located in the side groove (29). The adjustment component (3) includes a bracket (35) and a rope wheel. The bracket (35) is fixed to the bottom of the side groove (29). The rope wheel is rotatably mounted on the bracket (35). The output end of the traction rope (36) is fixedly wound around the rope wheel. The rope wheel is driven to rotate and pull the film separator layer open under the action of the traction rope (36).

5. The green and energy-saving construction structure for building renovation according to claim 4, characterized in that: The side groove (29) is also provided with a locking member, which is used to restrict the reverse rotation of the rope wheel when the film separator is pulled to the preset unfolding position.

6. The green and energy-saving construction structure for building renovation according to any one of claims 1-5, characterized in that: The number of the thin film separation layers is two, including a first separation layer (23) and a second separation layer (24). Both separation layers are equipped with a slider (32), a traction rope (36) and an adjustment component (3). When the two separation layers are fully extended, the closed air cavity interlayer (28) can be divided into three independent and sealed sub-chambers.

7. The green and energy-saving construction structure for building renovation according to claim 6, characterized in that: The film separator is a transparent PET film, and the film surface is provided with an anti-aging coating and an anti-scratch coating.

8. The green and energy-saving construction structure for building renovation according to claim 1, characterized in that: Below the storage component, there is also a pair of rollers (27). The pair of rollers (27) are symmetrically rotated and assembled in the mounting cavity at the top of the mounting frame (21), and are elastically clamped on the front and rear sides of the film separator layer to guide the film separator layer to be smoothly wound or unwound.

9. A green and energy-saving construction method for building renovation, using the green and energy-saving construction structure for building renovation as described in any one of claims 1-8, characterized in that it includes the following steps: Step 1: Pre-treatment of existing window sashes; clean the outer surface of existing window sashes, remove the aged sealing layer, and install an elastic buffer pad layer on the inner side of the outer window frame of the existing window sashes; Step 2: Modification unit assembly; Customize the modification unit according to the size of the existing window sash, and fix the installation frame to the inside of the existing window sash in a close fit and seal, so that the glass window sash is parallel to the existing window sash and forms a closed air cavity interlayer. Step 3: Fill the connection between the installation frame and the existing window sash with sealant to form a complete seal; Step 4: By adjusting the component to drive the expansion and contraction of the partition layer, verify the function of switching the partition state of the air cavity interlayer, test the sealing performance and thermal resistance adjustment effect, and ensure that there is no air leakage or water seepage.

Images