A residential house building energy-saving external wall internal insulation system

By integrating the base interface adaptation, gradient thermal insulation, thermal bridge closed-loop blocking, and moisture balance control unit, the systemic problems of existing residential exterior wall interior insulation technology are solved, achieving energy-saving effects and living comfort throughout the entire life cycle. It is suitable for energy-saving renovation of new and existing buildings.

CN122129099APending Publication Date: 2026-06-02CHINA CONSTR SEVENTH ENG DIVISION CORP LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA CONSTR SEVENTH ENG DIVISION CORP LTD
Filing Date
2026-04-30
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing residential exterior wall insulation technology has systemic defects, including problems such as delamination, hollowing, detachment, large heat loss due to thermal bridging, and insufficient moisture control, making it difficult to meet the long-term energy-saving requirements of ultra-low energy consumption housing.

Method used

The system employs a base interface adaptation unit, a gradient thermal insulation unit, a thermal bridge closed-loop blocking unit, a moisture balance control unit, and a crack-resistant protective finish unit. Through interface compatibility technology, the performance of each unit is coupled to form an integrated energy-saving insulation system, avoiding mechanical anchoring and splicing seams. It adopts a continuous insulation layer and an asymmetric moisture control mechanism to achieve thermal stability and moisture balance throughout the entire life cycle.

Benefits of technology

It achieves energy-saving effects throughout its entire life cycle without thermal bridge breaks or hollow detachment, with a thermal resistance attenuation rate of less than 5%, high living comfort, convenient construction, and is suitable for new construction and renovation of existing buildings, meeting ultra-low energy consumption standards.

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Abstract

This invention discloses an energy-saving exterior wall insulation system for residential buildings, belonging to the field of building energy-saving insulation technology. The system includes a base interface adaptation unit, a gradient thermal insulation unit, a thermal bridge closed-loop blocking unit, a moisture balance control unit, and a crack-resistant protective finish unit. These units are arranged sequentially from the outside to the inside and coupled through an interface-compatible process. The base interface unit uses a permeable modified layer, the gradient insulation unit is a three-layer composite structure, the thermal bridge unit achieves full-node closed-loop blocking, the moisture balance control unit employs asymmetrical control of vapor barrier, humidity regulation, and moisture conduction, and the finish unit is a flexible, gradient, crack-resistant structure. This invention is integrated without breaks, thermal bridge leakage, or condensation and mold growth, exhibits excellent thermal performance, is easy to operate and maintain, is suitable for new residential buildings and renovations of existing buildings, and meets ultra-low energy consumption residential standards.
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Description

Technical Field

[0001] This invention relates to the field of building energy-saving insulation technology, and in particular to an energy-saving exterior wall insulation system for residential buildings. Background Technology

[0002] In the process of promoting the national "dual-carbon" strategy, energy conservation of residential building exterior walls is a core element in reducing building energy consumption and improving living comfort. Exterior wall insulation systems are widely used in residential projects, especially in the renovation of old communities and the energy-saving renovation of high-rise residential buildings, due to their advantages such as convenient construction, no occupation of building facade space, adaptability to existing building renovations, and no impact on building appearance. However, most existing traditional exterior wall insulation technologies have significant drawbacks and are mostly simple superpositions of single devices or components, rather than true system-level inventions. Specific disadvantages are as follows:

[0003] Firstly, existing technologies mostly focus on improving individual insulation boards, anchors, corner protectors, and other independent mechanical devices, which fall under the category of device inventions. They only optimize the performance of individual components and do not form a system synergy of the entire process, all nodes, and all functions. The various structural layers are independent of each other and have fragmented performance, which can easily lead to problems such as delamination, hollowing, and falling off, resulting in a significant reduction in the overall energy-saving effect.

[0004] Secondly, thermal bridging treatment only uses local component repair methods. For weak parts such as door and window openings, beams and columns, and pipe penetrations through walls, mechanical methods such as attaching insulation strips and adding corner guards are used to treat them separately, resulting in a large number of splicing seams and structural breaks. It cannot form a closed loop to block the thermal bridging. The heat loss of thermal bridging areas is still as high as 30% or more, which can easily cause condensation, mold and even mold growth on the walls, affecting the health of residents.

[0005] Third, the lack of moisture control function means that traditional internal insulation systems are either completely sealed, preventing indoor moisture from being discharged, or have insufficient vapor barrier, allowing outdoor moisture to penetrate the insulation layer, causing the insulation material to become damp and fail, resulting in a significant drop in thermal resistance. Moreover, once damp, the insulation cannot be repaired and can only be dismantled and rebuilt, making the system's service life far shorter than that of the building structure.

[0006] Fourth, the construction is disconnected from the system. The use of mechanical construction methods such as on-site assembly of panels, drilling and anchoring, and slotting and laying pipes seriously damages the continuity of the insulation system, creating a large number of thermal bridge breaks and defects. When renovating existing buildings, there is a lot of wet work, which causes serious disturbance to residents. The later operation and maintenance are difficult and cannot achieve stable performance throughout the entire life cycle.

[0007] In summary, existing technologies are all device-based improvements, lacking a system-level invention that integrates thermal synergy, moisture regulation, thermal bridge blocking, construction, and operation and maintenance. They cannot solve the systemic pain points of interior insulation of residential exterior walls and cannot meet the long-term energy-saving requirements of ultra-low energy consumption residences. Summary of the Invention

[0008] In view of the shortcomings in the above-mentioned background technology, the present invention proposes an energy-saving exterior wall internal insulation system for residential buildings, which solves the problem that most of the existing traditional exterior wall internal insulation technologies have obvious defects and are mostly simple superpositions of single devices or components.

[0009] The technical solution of the present invention is implemented as follows: an energy-saving exterior wall insulation system for residential buildings includes a base interface adaptation unit. The base interface adaptation unit is sequentially provided with a gradient thermal insulation unit, a thermal bridge closed-loop blocking unit, a moisture balance control unit, and a crack-resistant protective finish unit. The base interface adaptation unit, gradient thermal insulation unit, thermal bridge closed-loop blocking unit, moisture balance control unit, and crack-resistant protective finish unit are sequentially arranged from the outside to the inside along the wall thickness direction, and the adjacent units achieve performance coupling through interface compatibility technology.

[0010] Furthermore, the base interface adaptation unit includes a permeable inorganic interface modified structural layer, which covers the interior surface of the base wall and / or the outer edge extension area of ​​the thermal bridge node.

[0011] Furthermore, the thickness of the permeable inorganic interface modified structural layer is 1.5-3 mm.

[0012] Furthermore, the extension distance of the outer region of the thermal bridge node edge is 140~160mm.

[0013] Furthermore, the gradient thermal insulation unit comprises, from the outside to the inside, a high-density low thermal expansion insulation buffer layer, an ultra-low thermal conductivity core insulation layer, and an inorganic modified insulation leveling layer, with adjacent structural layers being synchronously composited using adhesive materials.

[0014] Furthermore, the thermal bridge closed-loop blocking unit includes insulation layer along the component, which is installed at door and window openings and / or concrete beams, columns and slabs and / or pipeline penetration points.

[0015] Furthermore, the insulation layer is provided around the perimeter of the door and window openings along the component, with a width of ≥200mm and integrally formed with the gradient thermal insulation unit.

[0016] Furthermore, the insulation layer extends along the entire length of the component, covering the concrete beams, columns, and slabs, with the width of the insulation layer and the distance between the edge of the component being h, where h ≥ 120 mm.

[0017] Furthermore, the moisture balance control unit includes a continuous vapor barrier membrane layer close to the base wall and an inorganic moisture-regulating protective layer close to the interior, with a micro-moisture-conducting channel provided between the continuous vapor barrier membrane layer and the inorganic moisture-regulating protective layer.

[0018] Furthermore, the crack-resistant protective finish unit includes an elastic crack-resistant layer and a decorative finish layer, wherein the elastic crack-resistant layer and the decorative finish layer are flexible gradient crack-resistant surfaces with a gradient transition in elastic modulus.

[0019] The beneficial effects of this invention are as follows: the system is integrally molded, without mechanical anchoring, splicing seams, or thermal bridge breaks, thus avoiding hollowing, cracking, and detachment; it has excellent thermal performance, long-term stable moisture balance, and no condensation or mold; it is convenient to construct and simple to operate and maintain, suitable for new construction and existing renovation, and meets the requirements of ultra-low energy consumption and dual carbon.

[0020] 1. Strong system integrity and no defects of the device type: The whole integrated molding has no mechanical anchoring, no splicing seam of the board and no thermal bridge break, avoiding the common problems of hollowing, cracking, falling off and thermal bridge leakage of traditional device type internal insulation. The overall heat transfer coefficient of the system is ≤0.16W / (㎡·K), which meets the ultra-low energy consumption residential standard.

[0021] 2. Stable thermal performance and energy saving throughout the entire life cycle: The moisture balance system prevents the insulation layer from failing due to moisture, the thermal bridge closed-loop system eliminates local heat loss, and the thermal resistance decay rate of the system is ≤5% throughout the entire life cycle, which is far superior to traditional internal insulation systems.

[0022] 3. High living comfort, no risk of condensation and mold: The humidity control system dynamically balances indoor humidity, and the temperature of the inner surface of the wall is uniform, with no local low temperature condensation, which completely solves the problems of mold and dampness on the indoor walls and improves the health level of living.

[0023] 4. Wide adaptability and convenient construction and maintenance: It is suitable for both newly built concrete structure residential buildings and renovation of existing masonry structure residential buildings. There is no wet work or drilling and grooving during construction. The operation and maintenance are simple and the total life cycle cost is low, which meets the national requirements for building energy conservation and dual-carbon development. Attached Figure Description

[0024] To more clearly illustrate the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the system layout of the present invention;

[0026] Figure 2 This is a schematic diagram of the structural layout of the gradient thermal insulation unit of the present invention. Detailed Implementation

[0027] 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.

[0028] like Figure 1 and Figure 2 As shown in Example 1, an energy-saving exterior wall insulation system for residential buildings includes a base interface adaptation unit. The base interface adaptation unit is sequentially equipped with a gradient thermal insulation unit, a thermal bridge closed-loop blocking unit, a moisture balance control unit, and a crack-resistant protective finish unit. The base interface adaptation unit, gradient thermal insulation unit, thermal bridge closed-loop blocking unit, moisture balance control unit, and crack-resistant protective finish unit are sequentially arranged from the outside to the inside along the wall thickness direction, and the adjacent units achieve performance coupling through interface compatibility technology.

[0029] In this embodiment, the base layer interface adaptation unit includes a permeable inorganic interface modification structural layer, which covers the interior surface of the base wall and / or the outer edge extension area of ​​the thermal bridge node. The thickness of the permeable inorganic interface modification structural layer is 1.5-3mm. The outer extension distance of the outer edge extension area of ​​the thermal bridge node is 140-160mm. This layer is used to eliminate surface porosity defects in the base wall, improve the overall bonding compatibility and structural integrity of the system, and forms a continuous modified interface layer using a permeable interface modification process. It is compatible with both concrete and masonry residential base walls, blocks the internal moisture migration channels of the base wall, and provides a uniform stress interface for subsequent insulation units.

[0030] Specifically, the base interface adaptation unit adopts a penetrating inorganic interface modifier overall coating process, with the thickness of the modified treatment layer controlled at 1.5-3mm. The treatment range covers the entire interior surface of the base wall and the area extending 150mm beyond the edge of all thermal bridge nodes. After treatment, the surface bonding strength of the base wall is ≥0.3MPa, the water vapor penetration resistance is uniform and controllable, and it has chemical compatibility with the materials of the subsequent gradient thermal insulation unit, with no delamination or hollowing risks.

[0031] In this embodiment, the gradient thermal insulation unit comprises, from the outside to the inside, a high-density, low-thermal-expansion insulation buffer layer, an ultra-low thermal conductivity core insulation layer, and an inorganic modified insulation leveling layer. Adjacent structural layers are synchronously composited using adhesive materials. By relying on the composite molding of multiple insulation materials with progressively decreasing thermal conductivity, the thermal insulation performance is maximized and the internal surface temperature is homogenized through a thermal gradient transition, avoiding localized thermal stress concentration. Furthermore, there are no internal cavities or mechanical anchoring breaks, forming a continuous thermal resistance layer.

[0032] Specifically, the gradient thermal insulation unit is a three-layer continuous composite structure, consisting of a high-density, low-thermal-expansion insulation buffer layer, an ultra-low thermal conductivity core insulation layer, and an inorganic modified insulation leveling layer, from the outside to the inside. The three layers are synchronously composited using the same batch of bonding materials, with no independent panel splicing seams. The thermal conductivity of the insulation buffer layer is 0.032-0.035 W / (m·K), the thermal conductivity of the core insulation layer is ≤0.010 W / (m·K), the thermal conductivity of the insulation leveling layer is 0.028-0.031 W / (m·K), and the overall system heat transfer coefficient is ≤0.16 W / (㎡·K), which is compatible with ultra-low energy consumption residential energy-saving standards.

[0033] In this embodiment, the thermal bridge closed-loop blocking unit includes an insulation layer along the component, which is installed at door and window openings and / or concrete beams, columns, and slabs and / or pipe penetration points. The insulation layer along the component is installed around the perimeter of the door and window openings, with a width ≥ 200mm and integrally formed with the gradient thermal insulation unit. The insulation layer along the component fully wraps and extends over the concrete beams, columns, and slabs, with the wrapping width and the distance between the component's edge being h, where h ≥ 120mm. To provide a systematic blocking system covering the weak points of thermal bridges throughout the wall, for the four core thermal bridge nodes—door and window openings, concrete beams and columns, floor beams and slabs, and pipe penetration points—a continuous extension process using the same material as the gradient thermal insulation unit is adopted to form a closed-loop blocking structure without breaks or seams, eliminating localized thermal bridge heat loss and condensation risks.

[0034] Specifically, the thermal bridge closed-loop blocking unit is a systematic, uninterrupted structure, rather than a local component repair: at door and window openings, the insulation layer extends continuously around the perimeter of the opening, with a width ≥200mm and is integrally formed with the wall insulation layer; at concrete beams, columns, and slabs, the insulation layer extends fully along the cross-section of the component, with the wrapping width exceeding the edge of the component by ≥120mm; at pipe penetration points, the insulation material is used for integral filling and sealing, seamlessly connecting with the wall insulation layer, and the linear heat transfer coefficient of the entire system is ≤0.01W / (m·K).

[0035] In this embodiment, the moisture balance control unit includes a continuous vapor barrier layer close to the base wall and an inorganic moisture-regulating protective layer close to the interior. A micro-moisture-conducting channel is provided between the continuous vapor barrier layer and the inorganic moisture-regulating protective layer. Integrating vapor barrier, moisture conduction, and moisture regulation functions, it employs an asymmetric control mechanism of vapor barrier on the outside and moisture regulation on the inside. This prevents outdoor moisture from intruding into the insulation layer while simultaneously guiding the bidirectional migration of indoor moisture, balancing the humidity of the wall and the indoor air, and preventing the insulation layer from becoming damp and failing, and preventing condensation and mold growth on the indoor walls.

[0036] Specifically, the asymmetric control mechanism of the moisture balance control unit is as follows: a continuous vapor barrier layer is set on the side close to the base wall, with a water vapor permeability resistance ≥1800m²·h·Pa / g, completely blocking the intrusion of outdoor water vapor; an inorganic moisture-regulating protective layer is set on the side close to the interior, with a balance moisture absorption capacity ≥12%, which can dynamically adsorb and release indoor moisture; a micro-moisture conduction channel is reserved between the two layers to realize the directional conduction of moisture inside the insulation layer, avoiding water vapor retention that leads to a decrease in insulation performance.

[0037] In this embodiment, the crack-resistant protective finish unit includes an elastic crack-resistant layer and a decorative surface layer. Both the elastic crack-resistant layer and the decorative surface layer are flexible, gradient-type crack-resistant surfaces with a gradient transition in elastic modulus. Employing a flexible, gradient-type crack-resistant process, the elastic modulus gradient transition adapts to the deformation difference between the base wall and the insulation layer, achieving integrated protection, crack resistance, and decoration. This ensures the system remains crack-free, free of hollow areas, and free of peeling during long-term use, maintaining stable energy-saving performance throughout the system's entire lifecycle.

[0038] The system is equipped with an integrated construction and operation and maintenance unit, an indispensable component of the overall system. This unit comprises four main processes: factory-mixed materials, on-site overall coating, synchronous construction of key nodes, and post-construction humidity monitoring. It achieves seamless system collaboration across materials, construction, and operation and maintenance. The construction process eliminates on-site grooving, mechanical drilling, and the assembly of loose components. For renovations of existing residential buildings, it enables dry, rapid installation, significantly reducing construction disturbance. Within the integrated construction and operation and maintenance unit, a periodic humidity warning mechanism is employed for post-construction maintenance. Humidity feedback from the moisture-regulating layer determines the moisture status of the insulation layer, allowing for performance diagnostics without damaging the system structure. Furthermore, the system requires no replacement of core insulation components throughout its entire lifespan, with a service life exceeding 50 years, synchronized with the building's main structure.

[0039] like Figure 1 and Figure 2 As shown in Example 2, an energy-saving exterior wall insulation system for residential buildings is an integrated and coordinated system that is continuously laid out along the interior side of the base wall. It has no independent mechanical devices, no scattered anchoring components, and no mechanical splicing of panels. It consists of five core units: a base interface adaptation unit, a gradient thermal insulation unit, a thermal bridge closed-loop blocking unit, a moisture balance control unit, and a crack-resistant protective finish unit, as well as a supporting integrated construction and maintenance process unit. The six modules are coupled and work together to form a complete energy-saving insulation system, rather than a simple combination of individual devices.

[0040] Among them, the base interface adaptation unit, as the transition layer between the system and the base wall, has the core function of eliminating surface defects of the base wall, improving interface adhesion compatibility, and blocking the migration of moisture from the base wall. It adopts an overall penetration modification process, rather than applying ordinary interface agents, to ensure that subsequent units form a whole with the base wall and avoid delamination and hollowing. The gradient thermal insulation unit achieves maximum thermal resistance and uniform internal surface temperature through a gradient decreasing thermal conductivity design, avoiding local thermal stress concentration. It has no cavities or breaks inside, forming a continuous thermal resistance layer. The thermal bridge closed-loop blocking unit targets thermal bridge nodes throughout the wall with a continuous extension process of the insulation layer to form a closed-loop structure without breaks, completely eliminating the hidden dangers of local thermal bridges. The moisture balance control unit adopts an asymmetrical mechanism of external vapor isolation and internal humidity regulation, taking into account both the moisture-proof insulation layer and the indoor humidity balance. The crack-resistant protective finish unit adapts to wall deformation through a gradient transition of elastic modulus, ensuring the long-term integrity of the system. The integrated construction and operation and maintenance process unit realizes the system synergy of materials, construction, and operation and maintenance throughout the entire process, ensuring the stable performance of the system throughout its entire life cycle.

[0041] Example 3: This example uses a newly built ultra-low energy consumption residential building exterior wall insulation system as an example. It is applied to a newly built reinforced concrete shear wall structure residential building in a hot summer and cold winter region. The base wall thickness is 200mm, and the system design heat transfer coefficient is ≤0.15W / (㎡·K). The entire system is implemented as an integrated system of five core units + process units:

[0042] Base interface adaptation unit: The entire interior wall surface, beams, columns, and opening edges are covered by a 2mm thick inorganic interface modifier applied by brushing. After treatment, the base bonding strength is 0.35MPa, which blocks the migration of water vapor inside the wall.

[0043] Gradient thermal insulation unit: From the outside to the inside, a high-density thermal insulation buffer layer (25mm thick, thermal conductivity 0.033W / (m·K)), an ultra-low thermal conductivity core insulation layer (15mm thick, thermal conductivity 0.009W / (m·K)), and an inorganic thermal insulation leveling layer (30mm thick, thermal conductivity 0.029W / (m·K)) are constructed in sequence. The three layers are simultaneously composited and formed without splicing seams.

[0044] Thermal bridge closed-loop blocking unit: The insulation layer extends continuously around the door and window openings with a width of 200mm, the beams and columns are fully wrapped with an extension width of 150mm, and the pipe penetration points are completely filled with insulation material, seamlessly connecting with the wall insulation layer to form a fully closed-loop blocking.

[0045] Moisture balance control unit: A vapor barrier membrane layer (water vapor permeability resistance 2000m²·h·Pa / g) is laid on the outside, an inorganic moisture conditioning layer (balance moisture absorption 13%) is constructed on the inside, and a micro moisture conduction channel is reserved in the middle to realize the directional conduction of water vapor;

[0046] Crack-resistant protective finishing unit: adopts a flexible gradient crack-resistant process, with an elastic crack-resistant layer and a decorative surface layer, and a gradient transition of elastic modulus to adapt to wall deformation;

[0047] Construction and maintenance unit: Factory-premixed materials are used for overall on-site coating, with simultaneous construction at key points. The humidity of the moisture-regulating layer is monitored regularly to determine the system's performance status.

[0048] Testing showed that the overall heat transfer coefficient of this system was 0.14 W / (㎡·K), with no thermal bridging or condensation, and a service life of over 50 years, meeting the near-zero energy consumption residential standard.

[0049] Example 4: This example uses an internal insulation system for the exterior walls of an existing residential building as an example for energy-saving renovation. This example is applied to the renovation of existing masonry structure residential buildings in cold regions. The base wall is 240mm sintered shale brick masonry. The system is designed with a heat transfer coefficient of ≤0.19W / (㎡·K). The core optimized construction process unit adopts a dry quick-installation process, which does not require large-scale leveling of the base layer. Each unit is adapted to the existing wall simultaneously, shortening the construction cycle by 60%. There is no wet work on site, which does not affect the normal life of residents. All performance of the system meets the national standards for energy-saving renovation of existing buildings, and there are no problems such as cracking, condensation, or hollowing.

[0050] Compared with existing device-based internal insulation technologies, this invention possesses significant novelty and inventiveness. Its core innovations all revolve around the overall system, without any device-based improvements: First, it breaks through the limitations of device-based inventions, pioneering a pure system-based internal wall insulation technology solution. This invention is not an improvement on individual mechanical components such as panels, anchors, or corner protectors, but rather constructs a complete collaborative system of five core units plus process units. These units achieve overall synergy through chemical compatibility, thermal coupling, and process integration, rather than mechanical splicing. This is a systemic invention, distinct from all existing device-based internal insulation technologies. Second, it pioneers a closed-loop thermal bridge blocking system, rather than local component repairs. Traditional technologies use independent insulation strips, corner protectors, and other devices to address thermal bridges at single points. This invention employs a continuous extension process for the insulation layer, achieving seamless closed-loop blocking of all thermal bridge nodes, completely eliminating thermal bridge heat loss and condensation risks, reducing thermal bridge losses by more than 85%, demonstrating outstanding inventiveness. Third, it constructs an asymmetric moisture balance control system, resolving the contradiction between insulation and moisture control and indoor comfort. Traditional technologies either isolate vapor or allow air to pass through, offering limited functionality. This invention employs a systematic control mechanism that isolates vapor on the outside, regulates humidity on the inside, and conducts moisture in the middle. This prevents the insulation layer from becoming damp and failing, dynamically balances indoor humidity, improves living comfort, and extends the system's lifespan to the same level as the building structure. Fourth, it integrates a construction and maintenance system, achieving controllable performance throughout the entire lifecycle. It abandons traditional on-site drilling, grooving, and assembly methods, adopting a comprehensive coating, synchronized node installation, and dry, rapid-installation process. Performance diagnosis and maintenance can be completed without damaging the system later, making it suitable for both new residential buildings and existing renovations, significantly reducing construction costs and disturbance to residents.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A residential building energy-saving exterior wall insulation system, characterized in that, It includes a base interface adaptation unit, a gradient thermal insulation unit, a thermal bridge closed-loop blocking unit, a moisture balance control unit, and a crack-resistant protective finish unit; the base interface adaptation unit, gradient thermal insulation unit, thermal bridge closed-loop blocking unit, moisture balance control unit, and crack-resistant protective finish unit are arranged sequentially from the outside to the inside along the wall thickness direction, and adjacent units achieve performance coupling through interface compatibility technology.

2. The energy-saving exterior wall insulation system for residential buildings according to claim 1, characterized in that, The base interface adaptation unit includes a permeable inorganic interface modified structural layer, which covers the interior surface of the base wall and / or the outer edge extension area of ​​the thermal bridge node.

3. The energy-saving exterior wall insulation system for residential buildings according to claim 2, characterized in that, The thickness of the permeable inorganic interface modified structural layer is 1.5-3 mm.

4. The energy-saving exterior wall insulation system for residential buildings according to claim 2, characterized in that, The outer extension distance of the edge extension region of the thermal bridge node is 140~160mm.

5. The energy-saving exterior wall insulation system for residential buildings according to claim 1, characterized in that, The gradient thermal insulation unit includes a high-density, low-thermal-expansion insulation buffer layer, an ultra-low thermal conductivity core insulation layer, and an inorganic modified insulation leveling layer arranged sequentially from the outside to the inside. Adjacent structural layers are synchronously composited using adhesive materials.

6. The energy-saving exterior wall insulation system for residential buildings according to claim 1, characterized in that, The thermal bridge closed-loop blocking unit includes insulation layer along the component, which is installed at door and window openings and / or concrete beams, columns and slabs and / or pipeline penetration points.

7. The energy-saving exterior wall insulation system for residential buildings according to claim 6, characterized in that, The insulation layer is set around the perimeter of the door and window openings along the component, with a width of ≥200mm and integrally formed with the gradient thermal insulation unit.

8. The energy-saving exterior wall insulation system for residential buildings according to claim 6, characterized in that, The insulation layer extends along the entire length of the component, covering the concrete beams, columns, and slabs, with the width of the insulation layer extending beyond the edge of the component by a distance h ≥ 120 mm.

9. The energy-saving exterior wall insulation system for residential buildings according to claim 1, characterized in that, The moisture balance control unit includes a continuous vapor barrier membrane layer close to the base wall and an inorganic humidity regulating and protective layer close to the interior, with a micro-humidity channel provided between the continuous vapor barrier membrane layer and the inorganic humidity regulating and protective layer.

10. The energy-saving exterior wall insulation system for residential buildings according to claim 1, characterized in that, The crack-resistant protective finish unit includes an elastic crack-resistant layer and a decorative finish layer, which are flexible, gradient crack-resistant structures with a gradient transition in elastic modulus.