An assembled zero-carbon house building envelope

Abstract

The application discloses an assembled zero-carbon house building envelope and belongs to the technical field of building envelopes. The assembled zero-carbon house building envelope comprises a light steel main structure, a phase change layer filled in the interlayer of the light steel main structure and a thermal insulation decorative composite board installed on the light steel main structure. The phase change layer comprises an outer frame, a cavity arranged in the outer frame and capsules arranged in the cavity. A fixing ring is arranged on the outside of the capsules, a connecting rod is arranged on the outside of the fixing ring, and air holes are formed between adjacent capsules. The light steel main structure, the phase change layer filled in the interlayer of the light steel main structure and the thermal insulation decorative composite board installed on the light steel main structure jointly form an assembled zero-carbon house building envelope. The phase change layer can effectively cope with the thermal expansion and cold contraction phenomenon at different temperatures, can realize heat storage and release, is beneficial to the realization of the zero-carbon target and thus reduces the energy consumption of the building.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of building envelope, and particularly relates to a fabricated zero-carbon house building envelope. BACKGROUND

[0002] Zero-carbon buildings can significantly reduce energy consumption during heating and cooling by optimizing the thermal insulation and air tightness of the envelope, combined with high-efficiency heat recovery fresh air systems. At the same time, renewable energy and new energy storage technologies can be fully utilized to provide a more comfortable, healthy and sustainable indoor environment while reducing energy consumption.

[0003] The envelope is composed of thermal insulation decorative composite boards, anchoring parts, bonding materials and sealing materials, and is placed on the outer side of the building wall. The connection between the base wall and the envelope adopts the combination of adhesive bonding and anchor bolt, which plays a role of thermal insulation, protection and decoration for the building.

[0004] Zero-carbon buildings are a new sustainable building model. Thermal insulation technology is a key technology to improve energy efficiency. In the thermal energy management of building walls, how to effectively block heat transfer, store and release heat energy becomes a key. The existing thermal insulation technology has the following problems: first, traditional thermal insulation materials usually use a single thermal insulation layer or a reflective layer, which lacks effective response to thermal expansion and contraction, resulting in insufficient structural stability and prone to cracking or loosening; second, the existing thermal insulation structure design mostly uses a single dense structure, which lacks effective air hole design, and the thermal insulation performance is limited, which is difficult to meet the demand of zero-carbon buildings for efficient thermal insulation and thermal energy management.

[0005] The patent application with the patent publication number CN119914039A discloses a low-energy building envelope, which is provided with a sliding mechanism on both sides of the cross beam. The sliding mechanism includes a water tank, two sliding blocks are symmetrically fixed on both sides of the water tank, and the sliding blocks are slidingly connected in the corresponding sliding grooves. A cleaning mechanism is installed at the bottom of the water tank, and the cleaning mechanism includes a cleaning brush. A scraping mechanism is arranged in the inside of the shell, and the scraping mechanism includes a plurality of lifting columns installed at equal intervals in the inside of the shell, and a scraper is commonly installed at the bottom of the plurality of lifting columns. It can remove stubborn stains on the glass roof and effectively shovel snow.

[0006] However, the building envelope in the patent has the following shortcomings: the envelope can only remove roof stains to improve light transmittance and improve energy utilization, but lacks effective cooling means, which is not conducive to achieving zero-carbon effect of the house. SUMMARY

[0007] The purpose of this invention is to address the problems in existing building envelopes that lack effective responses to thermal expansion and contraction, leading to loosening or cracking and affecting overall stability; and the lack of efficient heat storage and release mechanisms, making it difficult to effectively regulate indoor temperature. This invention provides a prefabricated zero-carbon building envelope.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] A prefabricated zero-carbon building envelope includes a light steel main structure; a phase change layer is filled within the interlayer of the light steel main structure, and a thermal insulation and decorative composite panel is installed on the light steel main structure; the phase change layer includes an outer frame, and a cavity is provided inside the outer frame, with multiple capsules inside the cavity; a fixing ring is provided on the outside of the capsules, and a first limiting groove is opened on the fixing ring, with a limiting block matched on the first limiting groove; a second limiting groove is opened on the outside of the limiting block, with a rubber ring matched on the second limiting groove; a connecting rod is provided on the outside of the fixing ring; and air holes are formed between adjacent capsules.

[0010] Furthermore, fireproof plates are provided on both sides of the light steel main structure. The light steel main structure is rectangular or H-shaped, and the material of the reflective heat insulation layer is metal or ceramic facing material.

[0011] Furthermore, the capsule is elliptical in shape; a fixing ring is provided at the maximum diameter of the capsule, and the inner side of the limiting block is arc-shaped.

[0012] Furthermore, the capsule encapsulates a solid-liquid phase change material; the capsule is made of an elastic material.

[0013] Furthermore, the connecting rod connects two adjacent fixing rings, and the inner sidewalls of the outer frame are provided with embedded fixing blocks. The embedded fixing blocks are positioned corresponding to the connecting rods, and the connecting rods near the inner sidewalls of the outer frame are fixedly connected to the embedded fixing blocks.

[0014] Furthermore, the capsules are arranged in uniform layers, and the capsules are fixed together by fixing rings.

[0015] Furthermore, an adhesive layer is provided on the outer side of the light steel main structure, and the other side of the adhesive layer is fixedly connected to the inner side of the thermal insulation and decorative composite board.

[0016] Furthermore, the upper part of the thermal insulation and decorative composite panel is provided with a first card block and a second card block, and a third slot is provided at the bottom of the second card block.

[0017] Furthermore, the bottom of the thermal insulation and decorative composite panel is provided with a first groove that matches the first card block and a second groove that matches the second card block; an extension plate is provided at the bottom of the second groove.

[0018] Furthermore, the upper part of the thermal insulation and decorative composite panel is provided with a horizontal limiting hole, and an anchor rod is matched in the limiting hole; the anchor rod is Z-shaped, one end of the anchor rod is fixedly connected to the light steel main structure, and the other end of the anchor rod is inserted into the limiting hole.

[0019] The beneficial effects of this invention are:

[0020] 1. This invention incorporates a phase change layer located within the interlayer of the light steel main structure. The phase change layer contains multiple capsules made of highly elastic and recoverable materials, which can effectively cope with thermal expansion and contraction under different temperature conditions. The elastic material undergoes appropriate deformation according to environmental conditions when the temperature changes, avoiding structural loosening caused by temperature fluctuations, thereby effectively solving the problems caused by thermal expansion and contraction and improving the overall structural stability.

[0021] 2. This invention encapsulates a solid-liquid phase change material containing paraffin and fatty acids in a capsule. Under high-temperature conditions, the solid-liquid phase change material can absorb a large amount of heat through a phase change process, thereby effectively reducing the ambient temperature inside the house. Under low-temperature conditions, the material releases the stored heat through a reverse phase change process, maintaining the stability of the ambient temperature inside the house. This characteristic makes the solid-liquid phase change material of significant application value in zero-carbon houses, enabling efficient heat energy storage and release, improving the energy utilization efficiency of the house, reducing dependence on traditional energy sources, and contributing to the achievement of zero-carbon goals.

[0022] 3. This invention creates a biomimetic porous structure by forming pores between adjacent capsules, with the capsules evenly spaced. The air filling the pores is a poor conductor of heat, effectively blocking heat transfer. This significantly improves the thermal insulation performance of the wall, reduces the exchange of heat between indoors and outdoors, thereby reducing the building's energy consumption and contributing to the achievement of zero-carbon goals.

[0023] 4. This invention arranges the capsules evenly in layers, and fixes them with a fixing ring. The fixing ring has a rubber ring on the outside. The rubber ring can automatically adjust the position of the limiting block in the first limiting groove according to the size of the capsule, so as to ensure that the limiting block on the fixing ring accurately fixes the capsule and fixes the capsule. On the one hand, it fixes the position of the capsule, and on the other hand, it ensures the stability of the capsule. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2This is a schematic cross-sectional view of the phase change layer of the present invention;

[0027] Figure 3 This is a schematic cross-sectional view of the internal structure of the phase change layer of the present invention;

[0028] Figure 4 This is a schematic diagram of the capsule distribution of the present invention;

[0029] Figure 5 This is a schematic diagram of the capsule connection of the present invention;

[0030] Figure 6 This is a schematic diagram of the connection between the capsule and the fixing ring of the present invention;

[0031] Figure 7 This is a schematic diagram showing the connection between the metal-finished thermal insulation composite panel and the light steel main structure of the present invention;

[0032] Figure 8 This is the present invention. Figure 7 Enlarged view of point A;

[0033] Figure 9 This is a schematic diagram showing the connection between the ceramic-faced thermal insulation composite board and the light steel main structure of the present invention.

[0034] In the diagram: 1. Thermal insulation and decorative composite panel; 1021. Outer frame; 1022. Cavity; 1023. Capsule; 1024. Air pore; 2. Light steel main structure; 201. Phase change layer; 202. Fireproof board; 3. Adhesive layer; 4. Limiting hole; 5. Anchor rod; 6. First locking block; 7. Second locking block; 8. First groove; 9. Second groove; 10. Third groove; 11. Extension plate; 12. Embedded fixing block; 13. Fixing ring; 1301. Connecting rod; 1302. First limiting groove; 1303. Limiting block; 1304. Second limiting groove; 1305. Rubber ring. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention. Example 1

[0036] Please see Figure 1 - Figure 2As shown, a prefabricated zero-carbon building envelope includes a light steel main structure 2, a phase change layer 201 installed in the interlayer of the light steel main structure 2, and an insulation and decorative composite panel 1 installed on the light steel main structure 2. The light steel main structure 2 is assembled into a house main structure. The light steel main structure 2 can be recycled and is a green and environmentally friendly circular building.

[0037] Fireproof plates 202 are provided on both sides of the light steel main structure 2. The fireproof plates 202 are used to encapsulate the phase change layer 201 in the interlayer of the light steel main structure, so that the phase change layer 201 is encapsulated in the interlayer of the light steel main structure 2.

[0038] The light steel main structure 2, the phase change layer 201 installed in the interlayer of the light steel main structure 2, and the thermal insulation and decorative composite panel 1 installed on the light steel main structure 2 together form a prefabricated zero-carbon building envelope structure.

[0039] The material of the thermal insulation and decorative composite board 1 can be metal veneer or ceramic veneer; the thermal insulation and decorative composite board 1 has certain weather resistance.

[0040] Please refer to it again. Figure 3 - Figure 6 As shown, the light steel main structure 2 is assembled in a rectangular or H-shaped shape, and the interior of the light steel main structure 2 is filled with a phase change layer 201; the phase change layer 201 includes an outer frame 1021, and a cavity 1022 is provided inside the outer frame 1021, and multiple capsules 1023 are provided inside the cavity 1022; the capsules 1023 are elliptical in shape.

[0041] A fixing ring 13 is provided at the maximum diameter of the capsule 1023. A first limiting groove 1302 is provided through the fixing ring 13. A limiting block 1303 is matched on the first limiting groove 1302.

[0042] The limiting block 1303 facing the inner side of the fixing ring 13 is arc-shaped, and the arc-shaped limiting block 1303 fits the elliptical capsule 1023 better; the limiting block 1303 facing the outer side of the fixing ring 13 has a second limiting groove 1304, and a rubber ring 1305 is matched on the second limiting groove 1304.

[0043] The rubber ring 1305 can automatically adjust the position of the limiting block 1303 in the first limiting groove 1302 according to the size of the capsule 1023, so as to ensure that the limiting block 1303 on the fixing ring 13 accurately fixes the capsule 1023 and fixes the capsule 1023; on the one hand, it fixes the position of the capsule 1023, and on the other hand, it ensures the stability of the capsule 1023.

[0044] The rubber ring 1305 can flexibly adjust the position of the limiting block 1303 within the first limiting groove 1302 according to the different dimensions of the capsule 1023 due to thermal expansion and contraction, thereby achieving precise fixation of the capsule 1023, ensuring the stability of the capsule 1023 on the fixing ring 13, and effectively adapting to the needs of capsules 1023 of different sizes. Through the elastic characteristics of the rubber ring 1305, the limiting block 1303 can automatically adapt to the shape of the capsule 1023, providing uniform fixing force and avoiding displacement or loosening caused by improper fixation.

[0045] The material encapsulated in capsule 1023 is fatty acid; capsule 1023 is made of rubber.

[0046] Capsule 1023 uses highly elastic and recoverable materials, which can effectively cope with the phenomenon of thermal expansion and contraction under different temperature conditions. When the temperature changes, the elastic material will undergo appropriate deformation according to environmental conditions, avoiding problems such as structural loosening caused by temperature fluctuations, thus effectively solving the problems caused by thermal expansion and contraction and improving the stability of the overall structure.

[0047] Solid-liquid phase change materials can absorb a large amount of heat through a phase change process at high temperatures, thereby effectively reducing the indoor temperature of a house. At low temperatures, the material releases the stored heat through a reverse phase change process, maintaining the stability of the indoor temperature. This characteristic makes solid-liquid phase change materials of great value in zero-carbon houses, enabling efficient heat storage and release, improving the energy efficiency of houses, reducing dependence on traditional energy sources, and contributing to the achievement of zero-carbon goals.

[0048] A connecting rod 1301 is provided between adjacent fixing rings 13, and the connecting rod 1301 is located on the outside of the fixing ring 13; adjacent fixing rings 13 are connected by the connecting rod 1301.

[0049] The inner sidewalls of the outer frame 1021 are provided with embedded fixing blocks 12. The positions of the embedded fixing blocks 12 and the connecting rods 1301 are correspondingly set. The connecting rods 1301, which are close to the inner sidewalls of the outer frame 1021, are fixedly connected to the embedded fixing blocks 12.

[0050] The capsules 1023 are arranged in uniform layers and fixed to each other by fixing rings 13. The connecting rods 1301 connect adjacent fixing rings 13, and air holes 1024 are formed between adjacent capsules 1023. The capsules 1023 are evenly arranged, resulting in multiple air holes 1024, thus forming a biomimetic porous structure.

[0051] The air filled with pores 1024 is a poor conductor of heat, which can effectively block the transfer of heat; it can significantly improve the thermal insulation performance of the wall, reduce the exchange of heat between indoors and outdoors, thereby reducing the building's energy consumption and contributing to the achievement of zero-carbon goals.

[0052] Biomimetic porous structures can effectively absorb sound wave energy, reduce noise reflection and propagation, significantly improve the sound insulation of buildings, and provide residents with a quieter and more comfortable indoor environment.

[0053] Biomimetic porous structures can guide and promote the natural flow of air, optimize the ventilation performance of buildings, and good ventilation helps regulate indoor temperature and humidity, reduce reliance on traditional mechanical ventilation systems, further reduce energy consumption, and are more conducive to achieving zero-carbon goals.

[0054] Please refer to it again. Figure 7 - Figure 8 As shown, an adhesive layer 3 is provided on the outer side of the light steel main structure 2, and the inner side of the thermal insulation and decorative composite board 1 is fixedly connected to the other side of the adhesive layer 3.

[0055] In this embodiment, when the reflective heat insulation layer is a metal cladding material, the connection method between the light steel main structure 2 and the heat-insulating decorative composite panel 1 is as follows:

[0056] The upper part of the thermal insulation and decorative composite panel 1 is provided with a first clip 6 and a second clip 7. The first clip 6 is located on the side close to the light steel main structure 2, and the second clip 7 is located on the side away from the light steel main structure 2. The upper part of the second clip 7 is provided with a chamfer. The bottom of the second clip 7 is provided with a third groove 10, which extends horizontally through the thermal insulation and decorative composite panel 1.

[0057] The bottom of the thermal insulation and decorative composite panel 1 is provided with a first slot 8 that matches the first clip 6. The bottom of the thermal insulation and decorative composite panel 1 on the side away from the light steel main structure 2 is provided with a second slot 9 that matches the second clip 7. An extension plate 11 is provided at the bottom of the second slot 9. The height of the extension plate 11 is greater than the height of the third slot 10. The extension plate 11 can cover the third slot 10. Special anchors are used at the third slot 10 to connect the thermal insulation and decorative composite panel 1 and the light steel main structure 2.

[0058] The upper thermal insulation and decorative composite panel 1 is inserted into the first slot 8 of the lower thermal insulation and decorative composite panel 1 by the first clip 6, and the second clip 7 is inserted into the second slot 9 of the lower thermal insulation and decorative composite panel 1. Then, the thermal insulation and decorative composite panel 1 and the light steel main structure 2 are connected at the third slot 10 by special anchors.

[0059] The extension plate 11 not only ensures the aesthetics of the exterior wall, but also provides effective protection for the special anchors. The special anchors are exposed to the natural environment for a long time, especially the erosion of wind and sun, which may cause corrosion and aging of the anchors, thus affecting their performance and service life. The extension plate 11 covers the special anchors, which not only improves the overall appearance quality of the building, but also significantly extends the service life of the special anchors, thereby improving the durability and safety of the building.

[0060] Please see Figure 9 As shown in this embodiment, when the reflective heat insulation layer is a ceramic veneer material, the connection method between the light steel main structure 2 and the heat insulation decorative composite panel 1 is as follows:

[0061] A horizontal limiting hole 4 is provided on the upper part of the thermal insulation and decorative composite panel 1 on the side away from the main light steel structure 2. The limiting hole 4 is located 5-8 cm away from the outer wall surface. An anchor rod 5 is matched in the limiting hole 4. The anchor rod 5 is Z-shaped. One end of the anchor rod 5 is fixedly connected to the main light steel structure 2, and the other end of the anchor rod 5 passes through the limiting hole 4. The anchor rod 5 is fixed to the insulation layer 101 and the reflective heat insulation layer by special anchors, realizing the connection between the main light steel structure 2 and the thermal insulation and decorative composite panel 1. The setting of the limiting hole 4 not only increases the aesthetics, but also ensures the connection between the main light steel structure 2 and the thermal insulation and decorative composite panel 1, and increases the stability.

[0062] First, the thermal insulation decorative composite panel 1 is bonded to the light steel main structure 2 with special adhesive. Then, the anchor rod 5 is inserted into the limiting hole 4 and fixedly connected using a special anchoring structure. It is worth noting that the special anchoring structure is fixed through the thermal insulation layer 101 and the reflective heat insulation layer to prevent the special anchor from penetrating the capsule 1023 and causing leakage in the capsule 1023.

[0063] In its specific implementation, it includes the following steps:

[0064] Step 1: When filling the phase change layer 201 into the light steel main structure 2, a certain gap is left around the outer frame 1021 to facilitate the connection between the anchor and the light steel main structure 2, and to prevent the anchor from penetrating the capsule 1023 and causing leakage in the capsule 1023.

[0065] Step 2: When the reflective heat insulation layer is a metal veneer material, the connection method between the light steel main structure 2 and the heat insulation decorative composite panel 1 is as follows: the heat insulation decorative composite panel 1 and the light steel main structure 2 are bonded together with special adhesive. Then, the upper heat insulation decorative composite panel 1 is inserted into the first groove 8 of the lower heat insulation decorative composite panel 1 by the first clip 6, and the second clip 7 is inserted into the second groove 9 of the lower heat insulation decorative composite panel 1. Then, the heat insulation decorative composite panel 1 and the light steel main structure 2 are connected at the third groove 10 by special anchors.

[0066] When the reflective heat insulation layer is a ceramic veneer material, the connection method between the light steel main structure 2 and the heat insulation decorative composite panel 1 is as follows: the heat insulation decorative composite panel 1 and the light steel main structure 2 are bonded together with special adhesive, and then the anchor rod 5 is inserted into the limiting hole 4 and fixedly connected using a special anchoring structure. It is worth noting that the special anchoring structure is fixed through the heat insulation layer 101 and the reflective heat insulation layer to prevent the special anchor from penetrating the capsule 1023 and causing leakage in the capsule 1023. Example 2

[0067] The encapsulation material in capsule 1023 is paraffin wax, and capsule 1023 is made of silicone.

[0068] Comparative Example 1:

[0069] The difference from Example 1 is that the phase change layer 201 is not provided in the high-performance building envelope.

[0070] Comparative Example 2:

[0071] The difference from Example 1 is that the material inside the phase change layer 201 is thermal insulation cotton.

[0072] The performance of the high-performance building envelopes of Examples 1-2 and Comparative Examples 1-2 was tested; the strength performance was tested according to standard GB50189-2015, the heat transfer coefficient performance was tested according to standard GB / T20311-2006, and the seismic performance was tested according to standard GB / T50011-2010.

[0073] Example 1 Example 2 Comparative Example 1 Comparative Example 2 Strength (Mpa) 3.75 3.72 3.78 3.71 Heat transfer coefficient (W / ㎡K) 0.18 0.23 0.32 0.34 Winter indoor temperature (℃) 24 22 3 5 Latent heat of phase change (kJ / kg) 115 105 20 70 Shock resistance (degree) Ⅷ Ⅷ Ⅷ Ⅷ

[0074] As can be seen from the table above, the high-performance building envelope of the present invention exhibits excellent strength performance, low heat transfer coefficient, and high latent heat of phase change performance, and has good thermal insulation performance. The envelope structure of the present invention adds a phase change layer, which is filled with capsules containing phase change materials. Under high temperature conditions, it can absorb a large amount of heat through the phase change process, thereby effectively reducing the ambient temperature inside the building. Under low temperature conditions, the material will release the stored heat through the reverse phase change process, maintaining the stability of the ambient temperature inside the building. It can achieve efficient heat energy storage and release, and improve the energy utilization efficiency of the building.

[0075] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0076] 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.

Claims

1. A prefabricated zero-carbon building envelope, comprising a light steel main structure (2); characterized in that: The interlayer of the light steel main structure (2) is filled with a phase change layer (201), and the light steel main structure (2) is equipped with a thermal insulation and decorative composite panel (1). The phase change layer (201) includes an outer frame (1021), and a cavity (1022) is provided inside the outer frame (1021). Multiple capsules (1023) are provided inside the cavity (1022). A fixing ring (13) is provided on the outside of the capsule (1023). A first limiting groove (1302) is provided on the fixing ring (13), and a limiting block (1303) is matched on the first limiting groove (1302). The limiting block (1303) has a second limiting groove (1304) on its outer side, and a rubber ring (1305) is matched on the second limiting groove (1304); a connecting rod (1301) is provided on the outer side of the fixing ring (13); and an air hole (1024) is formed between adjacent capsules (1023). The capsule (1023) encapsulates a solid-liquid phase change material; the material of the capsule (1023) is an elastic material; The connecting rod (1301) connects two adjacent fixing rings (13). The inner sidewalls of the outer frame (1021) are provided with embedded fixing blocks (12). The positions of the embedded fixing blocks (12) and the connecting rod (1301) are corresponding. The connecting rod (1301) close to the inner sidewall of the outer frame (1021) is fixedly connected to the embedded fixing blocks (12).

2. The prefabricated zero-carbon building envelope according to claim 1, characterized in that: Fireproof plates (202) are provided on both sides of the light steel main structure (2). The light steel main structure (2) is rectangular or H-shaped. The material of the reflective heat insulation layer is metal decorative material or ceramic decorative material.

3. The prefabricated zero-carbon building envelope according to claim 2, characterized in that: The capsule (1023) is elliptical in shape; a fixing ring (13) is provided at the maximum diameter of the capsule (1023), and the inner side of the limiting block (1303) is arc-shaped.

4. The prefabricated zero-carbon building envelope according to claim 3, characterized in that: The capsules (1023) are arranged in a uniform layer, and the capsules (1023) are fixed together by fixing rings (13).

5. The prefabricated zero-carbon building envelope according to claim 1, characterized in that: An adhesive layer (3) is provided on the outside of the light steel main structure (2), and the other side of the adhesive layer (3) is fixedly connected to the inside of the thermal insulation and decorative composite board (1).

6. The prefabricated zero-carbon building envelope according to claim 5, characterized in that: The upper part of the thermal insulation and decorative composite panel (1) is provided with a first card block (6) and a second card block (7), and a third slot (10) is provided at the bottom of the second card block (7).

7. The prefabricated zero-carbon building envelope according to claim 6, characterized in that: The bottom of the thermal insulation and decorative composite panel (1) is provided with a first slot (8) that matches the first card block (6) and a second slot (9) that matches the second card block (7); the bottom of the second slot (9) is provided with an extension plate (11).

8. The prefabricated zero-carbon building envelope according to claim 7, characterized in that: The upper part of the thermal insulation and decorative composite board (1) is provided with a horizontal limiting hole (4), and an anchor rod (5) is matched in the limiting hole (4); the anchor rod (5) is Z-shaped, one end of the anchor rod (5) is fixedly connected to the light steel main structure (2), and the other end of the anchor rod (5) is inserted into the limiting hole (4).

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