Building exterior wall insulation device

Abstract

The present invention provides a building exterior wall insulation device with high thermal insulation effect. The building exterior wall insulation device of this embodiment includes an inner insulation layer and an outer insulation layer connected to each other, the inner insulation layer includes a first insulation unit, the outer insulation layer includes a second insulation unit, the second insulation unit covers the space between two adjacent first insulation units, and the space between two adjacent second insulation units is opposite to the first insulation unit. This embodiment adopts a relative arrangement of the first insulation unit and the second insulation unit, which increases the interface thermal resistance between the first insulation unit and the second insulation unit, reduces thermal conductivity, and has a high thermal insulation effect. The first insulation unit and the second insulation unit are staggered, which reduces the heat transfer between the inside and outside of the building exterior wall, effectively reduces the dissipation of indoor heat and the entry of outdoor cold air, reduces the thermal bridge effect between the gaps, and improves the thermal insulation effect.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal insulation, in particular to a thermal insulation device for building exterior walls. Background Art

[0002] The main insulation materials currently used in my country include XPS (extruded polystyrene foam), EPS (polystyrene foam), and polystyrene insulation boards. XPS has a thermal conductivity of 0.0280 to 0.30 W / (m·K), providing excellent insulation. However, it is susceptible to cracking, shelling, and shedding, making it unsuitable for exterior wall applications. Currently, EPS, the primary exterior wall insulation material, has a thermal conductivity of 0.038 to 0.041 W / (m·K). However, this material is flammable and has been the cause of numerous serious fires, resulting in significant economic losses and numerous casualties. Furthermore, the exterior paint coating is prone to damage and discoloration, requiring cleaning and repainting every few years. At high temperatures, this insulation material emits harmful gases.

[0003] In recent years, a new material for building exterior wall insulation—vacuum insulation panels—has begun to be used. However, the core material currently used is still not optimal. Its core is primarily made of fiberglass, with a thermal conductivity of 0.031 W / (m·K) at room temperature. Furthermore, because the core material easily releases gases under vacuum, the vacuum outer film is prone to damage. Improper handling of thermal bridges at the edges can affect the insulation performance and service life. Further drawbacks include the complex construction process, which still wastes a significant amount of insulation mortar and labor. If the exterior layer is still painted, the exterior wall will still need to be repainted every few years, further consuming additional resources and labor. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a building exterior wall insulation device with high heat insulation effect.

[0005] In order to solve the above technical problems, an embodiment of the present invention provides a building exterior wall insulation device, including an inner insulation layer and an outer insulation layer connected to each other, the inner insulation layer includes a first insulation unit, the outer insulation layer includes a second insulation unit, the second insulation unit covers the space between two adjacent first insulation units, and the space between two adjacent second insulation units is opposite to the first insulation unit.

[0006] As a further improvement of the present invention, the first thermal insulation unit includes a first thermal insulation component and a first inner covering layer, the first inner covering layer is provided with a cavity, the first thermal insulation component is located in the cavity of the first inner covering layer, and the outer side of the first inner covering layer is sealed with a first aerogel felt; the first thermal insulation component includes at least two layers of stacked first insulation boards, and the densities of adjacent first insulation boards are different.

[0007] As a further improvement of the present invention, the cavity of the first inner coating layer is a vacuum cavity; a getter and a desiccant are provided in the cavity of the first inner coating layer.

[0008] As a further improvement of the present invention, the second thermal insulation unit includes a second thermal insulation member, a second inner covering layer and an outer covering layer, the outer covering layer and the second inner covering layer are both provided with a cavity, the second thermal insulation member is located in the cavity of the second inner covering layer, the outer side of the second inner covering layer is sealed with a second aerogel felt, the second thermal insulation member, the second inner covering layer and the second aerogel felt are all located in the cavity of the outer covering layer; the second thermal insulation member includes at least two layers of second insulation boards stacked together, and the densities of adjacent second insulation boards are different.

[0009] As a further improvement of the present invention, the cavity of the outer coating layer is a vacuum cavity; and the outer coating layer is made of alloy.

[0010] As a further improvement of the present invention, two adjacent sides of one side of the outer covering layer extend outward to form a connecting edge, and an anchor hole is provided on the connecting edge; when in use, the connecting edge covers the space between two adjacent first insulation units, and an anchor is passed through the anchor hole, and the anchor is used to fix the second insulation unit to the outer wall.

[0011] As a further improvement of the present invention, the cavity of the second inner coating layer is a vacuum cavity; a getter and a desiccant are provided in the cavity of the second inner coating layer.

[0012] As a further improvement of the present invention, a bolt hole is provided at one end of the outer covering layer in the second thermal insulation unit, and a bolt column is provided at the other end of the outer covering layer; an aerogel pad is provided on the inner wall of the bolt hole.

[0013] As a further improvement of the present invention, in the outer thermal insulation layer, two adjacent second thermal insulation units are adaptively connected through bolt holes and bolt posts.

[0014] As a further improvement of the present invention, the building exterior wall insulation device is flat, angled or three-sided cladding.

[0015] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: The present invention provides a building exterior wall insulation device with high thermal insulation effects. The building exterior wall insulation device of this embodiment includes an inner insulation layer and an outer insulation layer connected to each other. The inner insulation layer includes a first insulation unit, and the outer insulation layer includes a second insulation unit. The second insulation unit covers the space between two adjacent first insulation units, and the space between two adjacent second insulation units is opposite to the first insulation unit. This embodiment adopts a staggered arrangement of the first insulation unit and the second insulation unit, which increases the interfacial thermal resistance between the first insulation unit and the second insulation unit, reduces thermal conductivity, and achieves high thermal insulation effects. The connecting gaps between adjacent first insulation units are covered by the second insulation unit, and the connecting gaps between adjacent second insulation units are opposite to the first insulation unit. Heat transmitted from the gaps is blocked, reducing heat transfer between the inside and outside of the building exterior wall, effectively reducing indoor heat dissipation and outdoor cold air ingress, reducing the thermal bridge effect between the gaps, and improving the thermal insulation effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 2 is a schematic structural diagram of a building exterior wall thermal insulation device according to an embodiment of the present invention;

[0017] Figure 2 2 is a schematic structural diagram of a second thermal insulation unit of a building exterior wall thermal insulation device according to an embodiment of the present invention;

[0018] Figure 3 1 is a schematic diagram of the installation cross-sectional structure of the building exterior wall thermal insulation device according to an embodiment of the present invention;

[0019] Figure 4 yes Figure 3 A partial enlarged schematic diagram of Figure 1;

[0020] Figure 5 Schematic diagram of the bolt hole entry surface of the building exterior wall thermal insulation device according to an embodiment of the present invention;

[0021] Figure 6 2. It is a schematic diagram of the installation of a building exterior wall thermal insulation device according to a second embodiment of the present invention;

[0022] Figure 7 2. It is a schematic diagram of the installation of a building exterior wall thermal insulation device according to a third embodiment of the present invention;

[0023] Figure 8 This is a graph showing the thermal conductivity measurement results of the first insulation unit, the second insulation unit, the first insulation unit superimposed on the second insulation unit, and the EPS insulation board in the embodiment structure of the present invention.

[0024] The figure shows: a first insulation unit 1, a second insulation unit 2, a first insulation component 101, a first inner covering layer 102, a first aerogel felt 103, an insulation pad 104, a second insulation component 201, a second inner covering layer 202, an outer covering layer 203, a bolt hole 204, a bolt column 205, an aerogel pad 206, an anchor hole 207, an anchor 208, a connecting edge 209, and a second aerogel felt 210. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is described in detail below with reference to the accompanying drawings.

[0026] The embodiment of the present invention provides a building exterior wall insulation device, such as Figure 1 As shown, it includes an inner insulation layer and an outer insulation layer connected to each other, the inner insulation layer includes a first insulation unit 1, and the outer insulation layer includes a second insulation unit 2. The second insulation unit 2 covers the space between two adjacent first insulation units 1, and the space between two adjacent second insulation units 2 is opposite to the first insulation unit 1. As a preferred embodiment, Figure 2 As shown, the inner insulation layer of the building exterior wall insulation device of this embodiment is provided with a plurality of first insulation units 1, with adjacent first insulation units 1 connected. The outer insulation layer of the building exterior wall insulation device is provided with a plurality of second insulation units 2, with adjacent second insulation units 2 connected. The second insulation units 2 cover the spaces between adjacent first insulation units 1, with the spaces between adjacent second insulation units 2 facing the first insulation units 1.

[0027] In the thermal insulation device of this embodiment, the first insulation unit 1 and the second insulation unit 2 are arranged in a staggered manner, which increases the interfacial thermal resistance between the first insulation unit 1 and the second insulation unit 2, reduces thermal conductivity, and has a high thermal insulation effect. The first insulation unit 1 and the second insulation unit 2 are arranged in a staggered manner. The connecting gaps between adjacent first insulation units 1 are covered by the second insulation unit 2, and the connecting gaps between adjacent second insulation units 2 are covered by the first insulation unit 1. The heat transmitted from the gaps is blocked, reducing heat transfer between the inside and outside of the building's exterior wall, effectively reducing indoor heat dissipation and outdoor cold air ingress, reducing the thermal bridge effect between the gaps, and improving the thermal insulation effect.

[0028] As a preferred example, Figure 3 As shown, the first thermal insulation unit 1 includes a first thermal insulation component 101 and a first inner covering layer 102. The first inner covering layer 102 is provided with a cavity. The first thermal insulation component 101 is located in the cavity of the first inner covering layer 102. The outer four edges of the first inner covering layer 102 are sealed with a first aerogel felt 103.

[0029] The exterior wall insulation device of this embodiment features a first insulation unit 1 that utilizes an encapsulated structure and is sealed. This increases the interfacial thermal resistance between the first insulation element 101 and the first inner cladding layer 102, and between the first inner cladding layer 102 and the first aerogel felt 103. Furthermore, the aerogel felt has a low thermal conductivity of 0.013 to 0.018 W / m·k at room temperature, resulting in low thermal conductivity and excellent thermal insulation performance for the first insulation unit 1. The addition of a second insulation unit 2 further enhances the insulation performance of the exterior wall insulation device. The aerogel felt exhibits sufficient tensile and compressive strength, making the insulation device of this embodiment less susceptible to cracking when applied to exterior walls. Furthermore, the aerogel felt is hydrophobic, making it effectively waterproof and protecting against structural damage caused by rain, snow, freeze-thaw, and wet-dry cycles. After installation, it eliminates concerns about water seepage and effectively prevents mold on interior walls. Even in extremely cold regions, the insulation device of this embodiment is immune to water seepage and deformation, extending the lifespan of the building. The aerogel felt has high fireproof performance, so that the thermal insulation device of this embodiment has good fireproof performance. The aerogel felt has good sound absorption and noise reduction performance, so that the thermal insulation device of this embodiment can effectively reduce outdoor noise from entering the room.

[0030] Preferably, the cavity of the first inner cladding layer 102 is a vacuum cavity. A vacuum exists between the first inner cladding layer 102 and the first thermal insulation member 101. A vacuum does not conduct heat, thereby reducing the thermal conductivity of the first thermal insulation unit 1 and further reducing the thermal conductivity of the entire building exterior wall insulation device, thereby improving the insulation effect.

[0031] Preferably, a getter and a desiccant are provided in the cavity of the first inner coating layer 102. The getter and desiccant provided in the cavity of the first inner coating layer 102 can effectively absorb gas released by the material of the first thermal insulation element 101, maintain the vacuum degree within the first inner coating layer 102, maintain the low thermal conductivity of the first thermal insulation unit 1, and ensure high thermal insulation effect of the entire building exterior wall insulation device.

[0032] Preferably, the first thermal insulation member 101 includes at least two stacked first thermal insulation panels, with adjacent first thermal insulation panels having different densities. Compared to a single first thermal insulation panel of equal thickness, in this preferred embodiment, the first thermal insulation member 101 includes at least two stacked first thermal insulation panels, which effectively increases the interfacial thermal resistance between the layers. Furthermore, the thermal resistance between first thermal insulation panels of different densities is greater, resulting in less heat loss. The first thermal insulation member 101 is placed in the first inner covering layer 102 and evacuated to further reduce the thermal conductivity of the first thermal insulation unit 1, reduce the thermal bridge effect, and improve the thermal insulation effect of the entire building exterior wall insulation device.

[0033] As a preferred example, the second thermal insulation unit 2 includes an outer covering layer 203, a second thermal insulation component 201 and a second inner covering layer 202. The outer covering layer 203 and the second inner covering layer 202 are both provided with a cavity. The second thermal insulation component 201 is located in the cavity of the second inner covering layer 202. The outer four edges of the second inner covering layer are sealed with a second aerogel felt 210. The second thermal insulation component, the second inner covering layer and the second aerogel felt 210 are all located in the cavity of the outer covering layer.

[0034] In the building exterior wall insulation device of this embodiment, the second insulation unit 2 adopts a layered wrapping structure and is sealed, which increases the interfacial thermal resistance between the second insulation member 201 and the second inner covering layer 202, between the second inner covering layer 202 and the second aerogel felt 210, between the second aerogel felt 210 and the outer covering layer 203, and between the second inner covering layer 202 and the outer covering layer 203, so that the thermal conductivity of the entire second insulation unit 2 is low, thereby improving the thermal insulation effect of the insulation device.

[0035] Preferably, to reduce the thermal conductivity of the entire heat preservation device, the first inner covering layer 102 and / or the second inner covering layer 202 are made of a material having a thermal conductivity lower than 0.05 W / m·K. For example, the first inner covering layer 102 and / or the second inner covering layer 202 are composite aluminum foil bags.

[0036] As a preferred example, the cavity of the second inner covering layer 202 is a vacuum cavity. The space between the second inner covering layer 202 and the second insulation member 201 is a vacuum. A vacuum does not conduct heat, reducing the thermal conductivity of the second insulation unit 2 and, consequently, the thermal conductivity of the entire building exterior wall insulation device, thereby improving the insulation and heat preservation effect. Furthermore, a vacuum prevents sound from propagating, thereby enhancing the sound insulation and noise reduction effect of the building exterior wall insulation device.

[0037] As a preferred example, a getter and a desiccant are provided in the cavity of the second inner coating layer 202. The getter and desiccant provided in the cavity of the second inner coating layer 202 can effectively absorb gas released from the material of the second thermal insulation element 201, maintain a vacuum within the second inner coating layer 202, and maintain low thermal conductivity of the second thermal insulation unit 2, thereby ensuring high thermal insulation performance of the entire building exterior wall insulation device.

[0038] As a preferred embodiment, the second insulation element 201 comprises at least two stacked layers of second insulation panels, with adjacent second insulation panels having different densities. The second insulation element 201 comprises at least two stacked layers of second insulation panels, which effectively increases the interfacial thermal resistance between the layers. Furthermore, the thermal resistance between the second insulation panels of different densities is increased, resulting in reduced heat loss. The second insulation element 201 is placed within the second inner cladding layer 202 and evacuated to further reduce the thermal conductivity of the second insulation unit 2, minimizing the thermal bridge effect and improving the thermal insulation performance of the entire exterior wall insulation device.

[0039] Preferably, the first insulation member 101 and / or the second insulation member 201 are nanoporous insulation panels or aerogel insulation panels. Nanoporous insulation panels have a thermal conductivity of only 0.016 to 0.024 W / m·k, while aerogel insulation panels have a thermal conductivity of only 0.013 to 0.016 W / m·k. Used as the core material for the first insulation unit 1 and / or the second insulation unit 2, they further reduce the thermal conductivity of the first insulation unit 1 and / or the second insulation unit 2, thereby improving the insulation and heat preservation effect. These panels have excellent fire retardant properties, resulting in a highly fireproof thermal insulation device in this embodiment.

[0040] As a preferred example, the cavity of the outer coating layer 203 is a vacuum cavity, or the cavity of the outer coating layer 203 is filled with an inert gas. The inert gas has a low thermal conductivity, which reduces the heat loss between the outer coating layer 203 and the second inner coating layer 202, reduces the thermal conductivity of the second insulation unit 2, and further reduces the thermal conductivity of the entire building exterior wall insulation device, thereby improving the thermal insulation effect. At the same time, it improves the sound insulation and noise reduction effect of the building exterior wall insulation device.

[0041] As a preferred example, the outer cladding layer 203 is made of an alloy. The outermost layer of the second insulation unit 2 is made of an alloy, which reduces the overall mass of the device, lowers the building's load, and significantly mitigates the impact of earthquakes on the building. The alloy is flame-retardant, improving the device's fire resistance. The outermost layer is made of an alloy, making it easier to decorate the outer cladding, preventing paint from fading, and saving manpower and resources.

[0042] As a preferred example, Figure 2 As shown, one end of the outer covering layer 203 in the second heat-insulating unit 2 is provided with a bolt hole 204, and the other end of the outer covering layer 203 is provided with a bolt post 205. Two adjacent second heat-insulating units 2 are connected by the bolt hole 204 and the bolt post 205.

[0043] As a preferred example, Figure 2 As shown, two adjacent sides of one side of the outer covering layer 203 extend outward to form a connecting edge 209, and an anchor hole 207 is provided on the connecting edge 209. When in use, the connecting edge 209 is pressed under the adjacent second insulation unit and covers the space between the two adjacent first insulation units 1. Anchors 208 are passed through the anchor holes 207, and the anchors 208 pass through the space between the adjacent first insulation units 1, pressing the second insulation unit 2 onto the first insulation unit 1 and fixing it to the exterior wall. In addition, bonding is used between the exterior wall and the first insulation unit 1, and between the first insulation unit 1 and the second insulation unit 2. This bonding and anchoring method fixes the insulation device of this embodiment to the exterior wall, and it has strong integrity, is shock-resistant and crack-resistant, and is sturdy and safe. Further, as Figure 3 and Figure 4As shown, an insulating pad 104 is provided between two adjacent first insulation units 1 to compensate for the gap between the second insulation unit 2 and the outer wall caused by the misaligned arrangement of the first insulation unit 1 and the second insulation unit 2, thereby greatly reducing the thermal bridge effect and improving the insulation effect of the insulation device.

[0044] As a preferred example, Figure 3 As shown, an aerogel pad 206 is provided on the inner wall of the bolt hole 204. Aerogel pad 206 has low heat capacity, low thermal conductivity, and good toughness. When adjacent second insulation units 2 are connected, aerogel pad 206 significantly reduces the thermal bridge effect between the bolt hole and the bolt rod, thereby improving the thermal insulation effect of the insulation device.

[0045] As a preferred example, Figure 1 As shown, there are multiple bolt holes 204 at one end of the outer covering layer 203, and the number of bolt posts 205 at the other end of the outer covering layer 203 is the same as the number of bolt holes 204. The combination of multiple bolt holes and bolt posts makes the connection between adjacent second insulation units more secure. Figure 5 As shown, the bolt hole 204 is provided with a plurality of protrusions, which are evenly distributed along the inner wall of the bolt hole. The entrance surface of the bolt hole is claw-shaped, which can be six claws or eight claws. Correspondingly, the outer surface of the bolt post 205 is provided with a groove that matches the protrusion of the bolt hole. When the bolt post 205 is connected to the bolt hole, the friction between the bolt hole and the bolt post is increased. The first insulation unit 1 and the second insulation unit 2 are bonded together. If debonding occurs, the second insulation unit 2 is prone to warping. The two adjacent second insulation units 2 are connected to the bolt post through the claw-shaped bolt hole, which fixes the second insulation unit 2 that has debonded, effectively preventing the second insulation unit 2 from warping.

[0046] As a preferred example, the outer surface of the outer covering 203 is provided with an insulating layer, a decorative layer, and a protective layer in order from the inside out. The insulating layer is used to protect against lightning and prevent leakage, the decorative layer is used for decoration, and the protective layer effectively prevents the accumulation of dust particles and dirt and can be washed clean by rainwater, eliminating the need for manual cleaning.

[0047] As a preferred example, the building exterior wall insulation device of this embodiment is flat, angled or three-sided. Flat wall surfaces can be installed with flat building exterior wall insulation devices. An angled building exterior wall insulation device can be used at the junction of two walls, such as Figure 6 Compared with the use of two flat insulation boards connected at the junction, the use of angled building exterior wall insulation devices can reduce the thermal bridge effect at the junction and have a high thermal insulation effect. The junction of the roof and the two walls can use a three-sided cladding building exterior wall insulation device, such as Figure 7 As shown, the three-sided cladding exterior wall insulation device covers the roof and the two walls connected to the roof respectively, with no gap at the junction, reducing the thermal bridge effect at the junction and having a high thermal insulation effect.

[0048] Preferably, the inner insulation layer is fixed to the outside of the outer wall through a third adhesive layer, the two adjacent first insulation units 1 in the inner insulation layer are connected through a first adhesive layer, and the second insulation unit 2 in the outer insulation layer is connected to the outside of the first insulation unit 1 through a second adhesive layer.

[0049] When installing the building exterior wall insulation device of this embodiment, the first insulation unit 1 is bonded to the outside of the exterior wall, and multiple first insulation units 1 are connected to form an inner insulation layer. The second insulation unit is bonded to the outside of the first insulation unit, and the connecting edge of the second insulation unit covers the space between adjacent first insulation units. It is covered on the outside of the first insulation unit 1 and fixed to the exterior wall through anchors. Multiple second insulation units 2 are connected to form an outer insulation layer, and adjacent second insulation units 2 are connected through bolt holes and bolt posts. The other two sides of the second insulation unit opposite to the connecting edge cover the connecting edge of the adjacent second insulation unit.

[0050] The building exterior wall insulation device of this embodiment is light in weight, high in strength, and saves time and effort in transportation and installation. The construction is simple and fast, which not only saves construction costs but also reduces the overall construction cost.

[0051] The following experiments illustrate that the components in the embodiments of the present invention have good thermal insulation performance.

[0052] Sample 1: The first insulation unit adopts the structure of the embodiment of the present invention. The first insulation unit includes three layers of nano-microporous insulation panels and a multi-layer composite vacuum membrane. The three layers of nano-microporous insulation panels are stacked and arranged in the multi-layer composite vacuum membrane. The multi-layer composite vacuum membrane is evacuated, and the four outer edges of the multi-layer composite vacuum membrane are sealed with aerogel felt. Among them, the thickness of the nano-microporous insulation panel is 3.3mm, the length is 390mm, and the width is 390mm. The thickness of the multi-layer composite vacuum membrane is 1mm, and the covering surface is 400mm*400mm. The thickness of the aerogel felt is 5mm, and the length and width are 1800mm*30mm.

[0053] Sample 2: The second thermal insulation unit adopts the structure of the embodiment of the present invention. The second thermal insulation unit includes three layers of nano-microporous insulation panels, a multi-layer composite vacuum membrane and an alloy shell. The three layers of nano-microporous insulation panels are stacked and arranged in the multi-layer composite vacuum membrane. The multi-layer composite vacuum membrane is evacuated. The four outer edges of the multi-layer composite vacuum membrane are sealed with aerogel felt. The aerogel felt and the multi-layer composite vacuum membrane are covered with an alloy shell, and the alloy shell is evacuated. Among them, the thickness of the nano-microporous insulation panel is 3.3mm, the length is 390mm, and the width is 390mm. The thickness of the multi-layer composite vacuum membrane is 1mm, and the covering surface is 400mm*400mm. The thickness of the aerogel felt is 5mm, and the length and width are 1800mm*30mm. The thickness of the alloy shell is 12mm, the length is 400mm, and the width is 400mm.

[0054] Sample 3: A heat preservation device according to the embodiment of the present invention is used, and one sample 1 and one sample 2 are stacked.

[0055] Sample 4: Huibang EPS insulation board purchased on the market, with a thickness of 25mm, a length of 400mm and a width of 400mm.

[0056] Measure the thermal conductivity of the above samples. The thermal conductivity measurement device includes an HFM-215 multi-channel heat flow meter, a CYCW-408 temperature collector, and a patch temperature sensor. The thermal conductivity measurement method is based on the standard GB / T10295-2008 (Determination of steady-state thermal resistance and related properties of insulating materials - Heat flow meter method). The specific measurement steps are as follows:

[0057] Step 1: Measure the thickness of the workpiece.

[0058] Step 2: Place the DUT upright on the test bench. Attach two heat flux meter patches to one side of the DUT using double-sided tape. Place the two patches evenly across the DUT. Attach a temperature sensor 1 cm above each heat flux meter patch. Similarly, attach two heat flux meters and two temperature sensors to the opposite sides of the DUT.

[0059] Step 3: Connect the wires of each temperature sensor to the temperature collector and preheat the temperature collector and heat flow meter for 30 minutes.

[0060] Step 4: One side of the test piece is connected to the cold plate and the other side is connected to the hot plate, and the three plates are clamped together using a clamping device.

[0061] Step 5 Set the temperature of the cold plate to 10°C. Once the temperature reaches 10°C, turn on the hot plate and set its temperature to 40°C.

[0062] Step 6: Read the steady-state heat flux density from the heat flow meter and the temperature value from the temperature collector.

[0063] Step 7 Calculate the thermal conductivity of the test piece using the following formula:

[0064]

[0065] Where, Indicates the thermal conductivity of the measured object, represents the average heat flow, Indicates the thickness of the test piece, Indicates the average temperature of each point on the hot plate, Indicates the average temperature of each point on the cold plate.

[0066] Step 8: Record the data from the heat flow meter and temperature collector every 10 minutes. Record 12 data points to complete the test.

[0067] The present invention adopts the above-mentioned thermal conductivity measuring device and the above-mentioned thermal conductivity measuring method to measure the thermal conductivity of the above-mentioned four samples and obtain the thermal conductivity of each tested piece, such as Figure 8 shown.

[0068] from Figure 8 It can be seen that the average thermal conductivity of Sample 1 is ≤ 0.00314 W / m•k, the average thermal conductivity of Sample 2 is ≤ 0.0055 W / m•k, the average thermal conductivity of Sample 3 is ≤ 0.00367 W / m•k, and the average thermal conductivity of Sample 4 is ≤ 0.043 W / m•k. The thermal conductivity of the first insulation unit, the second insulation unit, and the first insulation unit superimposed on the second insulation unit in the embodiment of the present invention is much lower than that of the EPS insulation board.

[0069] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the specific embodiments described above. The specific embodiments and descriptions in the specification are merely intended to further illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A building exterior wall insulation device, characterized in that: The invention relates to a heat insulating layer comprising an inner heat insulating layer and an outer heat insulating layer connected to each other, wherein the inner heat insulating layer comprises a first heat insulating unit (1), the outer heat insulating layer comprises a second heat insulating unit (2), the second heat insulating unit (2) covers the space between two adjacent first heat insulating units (1), and the space between two adjacent second heat insulating units (2) is opposite to the first heat insulating unit (1); the second heat insulating unit (2) comprises a second heat insulating member (201), a second inner covering layer (202) and an outer covering layer (203), the outer covering layer (203) and the second inner covering layer (202) are ) are provided with a cavity; the second thermal insulation member (201) is located in the cavity of the second inner covering layer (202), the outer side of the second inner covering layer (202) is sealed with a second aerogel felt (210), and the second thermal insulation member (201), the second inner covering layer (202) and the second aerogel felt (210) are all located in the cavity of the outer covering layer (203); the second thermal insulation member is a nano-microporous thermal insulation board or an aerogel thermal insulation board; the second thermal insulation member (201) includes at least two layers of second thermal insulation boards stacked together, and the densities of adjacent second thermal insulation boards are different; Two adjacent sides of one side of the outer covering layer (203) extend outward to form a connecting edge (209), and an anchor hole (207) is provided on the connecting edge (209); when in use, the connecting edge (209) covers the space between two adjacent first thermal insulation units (1), and an anchor (208) is passed through the anchor hole (207), and the anchor (208) is used to press the second thermal insulation unit (2) onto the first thermal insulation unit 1 and fix it on the outer wall; the outer wall of the second thermal insulation unit (2) One end of the coating layer (203) is provided with a bolt hole (204), the other end of the outer coating layer (203) is provided with a bolt post (205), and the inner wall of the bolt hole (204) is provided with an aerogel pad (206); in the outer thermal insulation layer, two adjacent second thermal insulation units (2) are connected by the bolt hole and the bolt post; a plurality of protrusions are provided in the bolt hole (204), and the plurality of protrusions are evenly distributed along the inner wall of the bolt hole; the inlet surface of the bolt hole is claw-shaped, and the outer surface of the bolt post (205) is provided with a groove matching the protrusion of the bolt hole.

2. The building exterior wall insulation device according to claim 1, characterized in that: The first thermal insulation unit (1) comprises a first thermal insulation member (101) and a first inner covering layer (102); the first inner covering layer (102) is provided with a cavity; the first thermal insulation member (101) is located in the cavity of the first inner covering layer (102); the outer side of the first inner covering layer (102) is sealed with a first aerogel felt (103); the first thermal insulation member (101) comprises at least two layers of first thermal insulation boards stacked together, and the densities of adjacent first thermal insulation boards are different.

3. The building exterior wall insulation device according to claim 2, characterized in that: The cavity of the first inner coating layer (102) is a vacuum cavity; a getter and a desiccant are provided in the cavity of the first inner coating layer (102).

4. The building exterior wall insulation device according to claim 1, characterized in that: The cavity of the outer coating layer (203) is a vacuum cavity; and the outer coating layer (203) is made of alloy.

5. The building exterior wall insulation device according to claim 1, characterized in that: The cavity of the second inner coating layer (202) is a vacuum cavity; a getter and a desiccant are provided in the cavity of the second inner coating layer (202).

6. The building exterior wall insulation device according to claim 1, characterized in that: The building exterior wall thermal insulation device is in a plane type, an angled type or a three-sided cladding type.

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