Fireproof and pressure-resistant honeycomb decorative aluminum veneer

CN120245533BActive Publication Date: 2026-10-09YANGZHOU CHANGXIANG NEW MATERIAL CO LTD
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Patent Information

Application Number
CN202510306215.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-03-14
Publication Date
2026-10-09
Estimated Expiration
2045-03-14

AI Technical Summary

Technical Problem

这可能导致铝单板变形、损坏,甚至影响整个建筑结构的安全性

Benefits of technology

1、本申请的铝单板,设置有芯层单元和隔热单元,从而使得铝单板具有很好的抗压性能以及隔热性能。

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a pressure-resistant fireproof heat-insulating honeycomb decorative aluminum veneer, which comprises a panel unit, a core layer unit, a heat-insulating unit and a backboard unit, the core layer unit is in a honeycomb shape and is provided with a plurality of accommodating holes with a regular hexagonal cross section, the heat-insulating unit comprises heat-insulating pads and a plurality of heat-insulating plug blocks with a regular hexagonal cross section, the number of the heat-insulating plug blocks is equal to that of the accommodating holes and the heat-insulating plug blocks and the accommodating holes are one-to-one corresponding, and each heat-insulating plug block is inserted into one accommodating hole. The aluminum veneer has good pressure resistance and heat insulation by being provided with the core layer unit and the heat-insulating unit. The heat-insulating effect can be monitored in real time through the difference between the first temperature sensor and the second temperature sensor. The honeycomb aluminum veneer has a fireproof early warning function for the installation space.
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Description

Technical Field

[0001] This invention relates to the field of aluminum single-panel technology, and more specifically, to a pressure-resistant, fireproof, heat-insulating honeycomb decorative aluminum single-panel. Background Technology

[0002] Honeycomb aluminum panels are mainly composed of a face panel, a base panel, and a core material. Due to their unique honeycomb structure design, they typically possess good lightweight, sound insulation, and decorative properties, making them widely used in building exteriors, interior decoration, and other fields. However, existing honeycomb aluminum panels may have insufficient compressive strength under extreme or long-term loads. This can lead to deformation, damage, or even compromise the safety of the entire building structure. Some honeycomb aluminum panels may also have deficiencies in thermal insulation. Especially in applications requiring high-efficiency thermal insulation, such as building exteriors in high-temperature environments or spaces requiring constant indoor temperature, a simple honeycomb structure may not provide sufficient insulation, leading to indoor temperature fluctuations. Furthermore, after installation, honeycomb aluminum panels often lack effective means to monitor their insulation performance in real time. This can result in delayed detection and handling of decreased insulation performance or malfunctions, affecting overall usability and safety. Additionally, traditional honeycomb aluminum panels often lack fire warning functions. In the event of a fire, they may not issue an alarm in time, hindering timely detection and response and increasing the risk of fire spread. Summary of the Invention

[0003] The present invention aims to overcome the defects of the prior art and provide a pressure-resistant, fireproof, heat-insulating honeycomb decorative aluminum single panel.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an aluminum single panel, comprising a panel unit, a core layer unit, a heat insulation unit, and a back panel unit. The core layer unit is honeycomb-shaped and has multiple receiving holes with a cross-section of regular hexagons. The heat insulation unit includes a heat insulation pad and multiple heat insulation inserts with a cross-section of regular hexagons. The number of heat insulation inserts is equal to the number of receiving holes, and the two correspond one-to-one. Each heat insulation insert is inserted into one of the receiving holes. The heat insulation pad has multiple recesses. The panel unit includes a panel body, a rectangular frame fixedly connected to the panel body, and multiple protrusions fixedly connected to the panel body. The number of protrusions is equal to the number of recesses, and the two correspond one-to-one. Each protrusion is embedded in one of the recesses. The panel unit and the back panel unit are fixed together by fixing bolts.

[0005] Furthermore, the protrusion portion has a threaded hole, and the back plate unit has multiple countersunk holes. The number of countersunk holes is equal to the number of threaded holes, and the two correspond one-to-one. Each fixing bolt passes through one of the countersunk holes and engages with the threaded hole to fix the back plate unit and the protrusion portion together.

[0006] Furthermore, it also includes a first heat-conducting unit, a second heat-conducting unit, a covering unit, and a temperature measuring unit. The core layer unit has a first groove region, a second groove region, and a connecting groove region connecting the first groove region and the second groove region. Multiple heat-conducting pillars are fixedly connected to the panel body. The first heat-conducting unit includes a first heat-conducting plate, a first extension plate connected to the first heat-conducting plate, and multiple heat-conducting sleeves connected to the first heat-conducting plate. The number of heat-conducting pillars is equal to the number of heat-conducting sleeves, and they correspond one-to-one. Each heat-conducting pillar is inserted into one of the heat-conducting sleeves. The heat insulation unit has multiple perforations, the number of which is equal to the number of heat-conducting sleeves, and they correspond one-to-one. Each heat-conducting sleeve is inserted into one of the perforations. The second heat-conducting unit includes a second heat-conducting plate and a second extension plate connected to the second heat-conducting plate. The first heat-conducting plate is located in the first groove region, the second heat-conducting plate is located in the second groove region, and the first and second extension plates are located in the connecting groove region. The first heat-conducting plate, the first extension plate, the second heat-conducting plate, and the second extension plate all abut against the heat insulation plug. The covering unit includes a first covering part, a second covering part, and a connecting covering part connecting the first covering part and the second covering part. The first covering part has a first receiving groove for accommodating a first heat-conducting plate, and the second covering part has a second receiving groove for accommodating a second heat-conducting plate. The connecting covering part has a first strip groove for accommodating a first extension plate and a second strip groove for accommodating a second extension plate. The first strip groove has a first through hole, and the second strip groove has a second through hole. The back plate unit has a third through hole facing the first through hole and a fourth through hole facing the second through hole. The first extension plate has a first blind hole facing the first through hole, and the second extension plate has a second blind hole facing the second through hole. The back plate unit also has a mounting groove communicating with the third through hole and the fourth through hole. The temperature measuring unit includes a mounting plate installed in the mounting groove and a mounting box fixedly connected to the mounting plate. The mounting plate is equipped with a first temperature sensor inserted into the first blind hole and a second temperature sensor inserted into the second blind hole. The mounting box is equipped with a control unit and a wireless communication unit.

[0007] Furthermore, the first strip groove and the first receiving groove are connected, the second strip groove and the second receiving groove are connected, and the ends of the first strip groove and the second strip groove are both semi-circular.

[0008] Furthermore, a mounting post is also installed at the mounting plate, and a third temperature sensor is installed at the end of the mounting post. The back panel unit has a first hole, the connecting cover has a second hole, the heat insulation unit has a third hole, and the panel body has a fourth hole. The mounting post passes through the first hole, the second hole, and the third hole and abuts against the panel body. The third temperature sensor is located in the fourth hole.

[0009] Furthermore, the first temperature sensor, the second temperature sensor, and the third temperature sensor are all connected to the control unit.

[0010] Furthermore, the mounting plate and the mounting groove are fixedly connected by multiple mounting bolts.

[0011] Furthermore, the number of heat-conducting pillars and heat-conducting sleeves is 6 each.

[0012] Furthermore, the heat-conducting pillar has multiple heat-conducting ribs, and the heat-conducting sleeve has multiple heat-conducting grooves that cooperate with the heat-conducting ribs; the end of the heat-conducting sleeve has a heat-conducting ring that abuts against the panel body; and there is heat-conducting adhesive between the heat-conducting pillar and the heat-conducting sleeve.

[0013] This allows for better heat conduction between the heat-conducting pillar and the heat-conducting sleeve.

[0014] Furthermore, the depths of the first groove region, the second groove region, and the connecting groove region of the core layer unit are equal, and are half the thickness of the core layer unit.

[0015] Furthermore, both the heat-insulating plug and the heat-insulating pad are made of heat-insulating material.

[0016] Furthermore, both the panel unit and the back panel unit are made of aluminum alloy.

[0017] Furthermore, the core layer unit is made of aluminum foil or plastic.

[0018] Furthermore, both the heat insulation pad and the heat insulation plug are made of foam material.

[0019] Furthermore, the bounding box has multiple corner code units.

[0020] This facilitates the installation of aluminum panels.

[0021] Furthermore, the mounting post is made of rubber material and has a wire for a third temperature sensor running through it.

[0022] Beneficial effects: 1. The aluminum single panel of this application is provided with a core layer unit and a heat insulation unit, thereby giving the aluminum single panel excellent compressive strength and heat insulation performance.

[0023] 2. The aluminum single panel of this application can monitor the heat insulation effect in real time by means of the difference between the first temperature sensor and the second temperature sensor.

[0024] 3. The aluminum single panel of this application has a fire warning function for the installation space where the honeycomb aluminum single panel is located. Attached Figure Description

[0025] Figure 1 This is a first-person view of an aluminum panel. Figure 2 This is a schematic diagram of the aluminum single-panel from a second perspective. Figure 3 A schematic diagram showing the separation of the cover unit and the backplane unit; Figure 4 This is a magnified view of region A; Figure 5 A schematic diagram showing the separation of the first heat-conducting unit, the second heat-conducting unit, the covering unit, and the backplate unit; Figure 6 This is a first-person perspective diagram of component separation. Figure 7 This is a magnified view of region B. Figure 8 This is a magnified view of region C; Figure 9 This is a second-view diagram illustrating the separation of components.

[0026] Figure 10 This is an enlarged view of area D; Reference numerals: Panel unit 1; Panel body 1.1; Enclosing frame 1.2; Protrusion 1.3; Heat-conducting pillar 1.4; Heat-conducting rib 1.4.1; Fourth hole 1.5; Core layer unit 2; Receiving hole 2.1; Heat insulation unit 3; Heat insulation pad 3.1; Heat insulation insert 3.2; Recess 3.3; Perforated part 3.4; Third hole 3.5; Back plate unit 4; Third through hole 4.1; Fourth through hole 4.2; Mounting groove 4.3; First hole 4.4; First heat-conducting plate 5.1; First extension plate 5. 5.2; Heat-conducting sleeve; 5.3; First blind hole; 5.4; Heat-conducting groove; 5.5; Heat-conducting ring; 5.6; Second heat-conducting plate; 6.1; Second extension plate; 6.2; Second blind hole; 6.3; First cover part; 7.1; Second cover part; 7.2; Connecting cover part; 7.3; First receiving groove; 7.4; Second receiving groove; 7.5; First strip groove; 7.6; Second strip groove; 7.7; First through hole; 7.8; Second through hole; 7.9; Second hole part; 7.10; Mounting plate; 8.1; Mounting box; 8.2; Mounting post; 8.3; Third temperature sensor; 8.4. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] This invention provides a pressure-resistant, fireproof, and heat-insulating honeycomb decorative aluminum panel, as shown in the figure, comprising a panel unit 1, a core layer unit 2, a heat insulation unit 3, and a back panel unit 4. The core layer unit 2 is honeycomb-shaped and has multiple receiving holes 2.1 with a regular hexagonal cross-section. The heat insulation unit 3 includes a heat insulation pad 3.1 and multiple heat insulation inserts 3.2 with a regular hexagonal cross-section. The number of heat insulation inserts 3.2 is equal to the number of receiving holes 2.1, and the two correspond one-to-one. Each heat insulation insert 3.2 is inserted into one hole. The receiving hole 2.1 is located within the heat insulation pad 3.1, which has multiple recesses 3.3. The panel unit 1 includes a panel body 1.1, a rectangular frame 1.2 fixedly connected to the panel body 1.1, and multiple protrusions 1.3 fixedly connected to the panel body 1.1. The number of protrusions 1.3 is equal to the number of recesses 3.3, and they correspond one-to-one. Each protrusion 1.3 is embedded in one recess 3.3. The panel unit 1 and the back plate unit 4 are fixed together by fixing bolts. The protrusions 1.3 have threaded holes, and the back plate unit 4 has multiple countersunk holes, the number of which is equal to the number of threaded holes, and they correspond one-to-one. Each fixing bolt passes through one of the countersunk holes and engages with the threaded hole to fix the back plate unit 4 and the protrusions 1.3 together.

[0029] The aluminum single panel further includes a first heat-conducting unit, a second heat-conducting unit, a covering unit, and a temperature measuring unit. The core layer unit 2 has a first groove area, a second groove area, and a connecting groove area connecting the first groove area and the second groove area. Multiple heat-conducting pillars 1.4 are fixedly connected to the panel body 1.1. The first heat-conducting unit includes a first heat-conducting plate 5.1, a first extension plate 5.2 connected to the first heat-conducting plate 5.1, and multiple heat-conducting sleeves 5.3 connected to the first heat-conducting plate 5.1. The number of heat-conducting pillars 1.4 is equal to the number of heat-conducting sleeves 5.3, and they correspond one-to-one. Each heat-conducting pillar 1.4 is inserted into one heat-conducting sleeve 5.3. The heat insulation unit 3 has multiple perforations 3. 4. The number of perforations 3.4 is equal to the number of heat-conducting sleeves 5.3, and they correspond one-to-one. Each heat-conducting sleeve 5.3 is inserted into one perforation 3.4. The second heat-conducting unit includes a second heat-conducting plate 6.1 and a second extension plate 6.2 connected to the second heat-conducting plate 6.1. The first heat-conducting plate 5.1 is located in the first groove area, the second heat-conducting plate 6.1 is located in the second groove area, and the first extension plate 5.2 and the second extension plate 6.2 are located in the connecting groove area. The first heat-conducting plate 5.1, the first extension plate 5.2, the second heat-conducting plate 6.1, and the second extension plate 6.2 all abut against the heat-insulating plug 3.2. The covering unit includes a first covering part 7.1, a second... The backplate unit 4 includes a cover portion 7.2 and a connecting cover portion 7.3 connecting the first cover portion 7.1 and the second cover portion 7.2. The first cover portion 7.1 has a first receiving groove 7.4 for receiving the first heat-conducting plate 5.1, and the second cover portion 7.2 has a second receiving groove 7.5 for receiving the second heat-conducting plate 6.1. The connecting cover portion 7.3 has a first strip groove 7.6 for receiving the first extension plate 5.2 and a second strip groove 7.7 for receiving the second extension plate 6.2. The first strip groove 7.6 has a first through hole 7.8, and the second strip groove 7.7 has a second through hole 7.9. The backplate unit 4 has a third through hole 4.1 facing the first through hole 7.8 and a second through hole 4.1 facing the second through hole 7.9. The fourth through hole 4.2 of the through hole 7.9; the first extension plate 5.2 has a first blind hole 5.4 facing the first through hole 7.8; the second extension plate 6.2 has a second blind hole 6.3 facing the second through hole 7.9; the back plate unit 4 also has a mounting groove 4.3 communicating with the third through hole 4.1 and the fourth through hole 4.2; the temperature measuring unit includes a mounting plate 8.1 installed in the mounting groove 4.3 and a mounting box 8.2 fixedly connected to the mounting plate 8.1; a first temperature sensor inserted into the first blind hole 5.4 and a second temperature sensor inserted into the second blind hole 6.3 are installed on the mounting plate 8.1; and a control unit and a wireless communication unit are installed in the mounting box 8.2.

[0030] The first strip groove 7.6 and the first receiving groove 7.4 are connected, and the second strip groove 7.7 and the second receiving groove 7.5 are connected. The ends of the first strip groove 7.6 and the second strip groove 7.7 are both semi-circular. A mounting post 8.3 is also installed at the mounting plate 8.1. A third temperature sensor 8.4 is installed at the end of the mounting post 8.3. The back plate unit 4 has a first hole 4.4, the connecting cover 7.3 has a second hole 7.10, the heat insulation unit 3 has a third hole 3.5, and the panel body 1.1 has a fourth hole 1.5. The mounting post 8.3 passes through the first hole 4.4, the second hole 7.10, and the third hole 3.5 and abuts against the panel body 1.1. The third temperature sensor 8.4 is located in the fourth hole 1.5. The mounting plate 8.1 and the mounting groove 4.3 are fixedly connected by multiple mounting bolts. There are six heat-conducting posts 1.4 and six heat-conducting sleeves 5.3. The heat-conducting pillar 1.4 has multiple heat-conducting ribs 1.4.1, and the heat-conducting sleeve 5.3 has multiple heat-conducting grooves 5.5 that mate with the heat-conducting ribs 1.4.1; the end of the heat-conducting sleeve 5.3 has a heat-conducting ring 5.6 that abuts against the panel body 1.1; and heat-conducting adhesive is present between the heat-conducting pillar 1.4 and the heat-conducting sleeve 5.3. The depths of the first groove region, the second groove region, and the connecting groove region of the core layer unit 2 are equal, and are half the thickness of the core layer unit 2. The heat-insulating insert 3.2 and the heat-insulating pad 3.1 are both made of heat-insulating material; the panel unit 1 and the back panel unit 4 are both made of aluminum alloy; and the core layer unit 2 is made of aluminum foil or plastic.

[0031] Working principle: The honeycomb aluminum single panel of this application has a panel unit, a core layer unit, a heat insulation unit and a back panel unit. Due to the presence of the core layer unit, the aluminum single panel has good compressive strength and heat insulation performance. Furthermore, since there is a heat insulation unit between the panel unit and the back panel unit, the aluminum single panel has even better heat insulation performance.

[0032] Furthermore, among numerous arrayed aluminum panels, the aluminum panels described in this application can be spaced out, thereby achieving real-time monitoring, and the monitoring signals can be remotely transmitted and centrally processed. Due to the presence of the first and second heat-conducting units, the first heat-conducting unit can transfer heat from the panel body to the first blind hole of the first extension plate, which is then detected by the first temperature sensor. The second heat-conducting plate of the second heat-conducting unit abuts against the heat-insulating plug, and the second temperature sensor detects the temperature inside the second blind hole, which is actually detecting the temperature between the heat-insulating plug and the back plate unit. Therefore, the difference between the first and second temperature sensors can reflect the actual heat insulation effect of the aluminum panel of this application. Moreover, the covering unit covers the first and second heat-conducting units, so that the first and second heat-conducting units do not directly contact the back plate unit; and since the core layer unit has a first groove area, a second groove area, and a connecting groove area, the first and second heat-conducting units also do not directly contact the core layer unit, thereby making the heat conduction effect of the first and second heat-conducting units more accurate and less susceptible to interference.

[0033] Furthermore, the aluminum panel of this application also has a third temperature sensor, which is directly exposed on the outside of the panel unit to directly measure the temperature. When an abnormal temperature rise is detected, it can be determined that there is a fire risk, thereby realizing timely alarm.

[0034] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes and modifications can be made to the present invention without departing from the scope defined by the claims.

Claims

1. A pressure-resistant, fire-resistant, and heat-insulating honeycomb decorative aluminum single panel, characterized in that, The system includes a panel unit, a core layer unit, a heat insulation unit, a back panel unit, a first heat-conducting unit, a second heat-conducting unit, a covering unit, and a temperature measuring unit. The core layer unit is honeycomb-shaped and has multiple hexagonal cross-section receiving holes. The heat insulation unit includes a heat insulation pad and multiple hexagonal cross-section heat insulation blocks. The number of heat insulation blocks equals the number of receiving holes, and they correspond one-to-one; each heat insulation block is inserted into one receiving hole. The heat insulation pad has multiple recesses. The panel unit includes a panel body, a rectangular frame fixedly connected to the panel body, and multiple protrusions fixedly connected to the panel body. The number of protrusions equals the number of recesses, and they correspond one-to-one; each protrusion is embedded in one of the receiving holes. The panel unit and back panel unit are fixed to the recessed portion by fixing bolts; the core layer unit has a first recessed area, a second recessed area, and a connecting recessed area connecting the first recessed area and the second recessed area; multiple heat-conducting pillars are fixedly connected to the panel body; the first heat-conducting unit includes a first heat-conducting plate, a first extension plate connected to the first heat-conducting plate, and multiple heat-conducting sleeves connected to the first heat-conducting plate, the number of heat-conducting pillars is equal to the number of heat-conducting sleeves and the two correspond one-to-one, each heat-conducting pillar is inserted into one heat-conducting sleeve, the heat insulation unit has multiple perforations, the number of perforations is equal to the number of heat-conducting sleeves and the two correspond one-to-one, each heat-conducting sleeve is inserted into one perforation; the second heat-conducting unit; The unit includes a second heat-conducting plate and a second extension plate connected to the second heat-conducting plate; the first heat-conducting plate is located in the first groove region, the second heat-conducting plate is located in the second groove region, and the first and second extension plates are located in the connecting groove region; the first heat-conducting plate, the first extension plate, the second heat-conducting plate, and the second extension plate all abut against the heat-insulating plug; the covering unit includes a first covering part, a second covering part, and a connecting covering part connecting the first covering part and the second covering part; the first covering part has a first receiving groove for accommodating the first heat-conducting plate, the second covering part has a second receiving groove for accommodating the second heat-conducting plate, and the connecting covering part has a first strip groove for accommodating the first extension plate and a second strip groove for accommodating the second extension plate. The extension plate has a second slot, the first slot has a first through hole, the second slot has a second through hole, the back plate unit has a third through hole facing the first through hole and a fourth through hole facing the second through hole, the first extension plate has a first blind hole facing the first through hole, the second extension plate has a second blind hole facing the second through hole, the back plate unit also has a mounting groove communicating with the third through hole and the fourth through hole, the temperature measuring unit includes a mounting plate installed in the mounting groove and a mounting box fixedly connected to the mounting plate, the mounting plate is equipped with a first temperature sensor inserted into the first blind hole and a second temperature sensor inserted into the second blind hole, and the mounting box is equipped with a control unit and a wireless communication unit.

2. The pressure-resistant, fireproof, and heat-insulating honeycomb decorative aluminum single panel according to claim 1, characterized in that, The protrusion has a threaded hole, and the back plate unit has multiple countersunk holes. The number of countersunk holes is equal to the number of threaded holes and the two correspond one-to-one. Each fixing bolt passes through one of the countersunk holes and engages with the threaded hole to fix the back plate unit and the protrusion.

3. The pressure-resistant, fireproof, and heat-insulating honeycomb decorative aluminum single panel according to claim 1, characterized in that, The first strip groove is connected to the first receiving groove, and the second strip groove is connected to the second receiving groove. The ends of both the first strip groove and the second strip groove are semi-circular.

4. The pressure-resistant, fireproof, and heat-insulating honeycomb decorative aluminum single panel according to claim 1, characterized in that, A mounting post is also installed on the mounting plate. A third temperature sensor is installed at the end of the mounting post. The back panel unit has a first hole, the connecting cover has a second hole, the heat insulation unit has a third hole, and the panel body has a fourth hole. The mounting post passes through the first hole, the second hole, and the third hole and abuts against the panel body. The third temperature sensor is located in the fourth hole.

5. The pressure-resistant, fireproof, and heat-insulating honeycomb decorative aluminum single panel according to claim 1, characterized in that, The mounting plate and the mounting groove are fixedly connected by multiple mounting bolts.

6. The pressure-resistant, fireproof, and heat-insulating honeycomb decorative aluminum single panel according to claim 1, characterized in that, The number of heat-conducting pillars and heat-conducting sleeves is 6 each.

7. The pressure-resistant, fireproof, and heat-insulating honeycomb decorative aluminum single panel according to claim 1, characterized in that, The heat-conducting column has multiple heat-conducting ribs, and the heat-conducting sleeve has multiple heat-conducting grooves that cooperate with the heat-conducting ribs. The end of the heat-conducting sleeve has a heat-conducting ring that abuts against the panel body; Thermal adhesive is present between the heat-conducting pillar and the heat-conducting sleeve.

8. The pressure-resistant, fireproof, and heat-insulating honeycomb decorative aluminum single panel according to claim 1, characterized in that, The depths of the first groove region, the second groove region, and the connecting groove region of the core layer unit are equal, and are half the thickness of the core layer unit.

9. The pressure-resistant, fireproof, and heat-insulating honeycomb decorative aluminum single panel according to claim 1, characterized in that, The heat-insulating plug and heat-insulating pad are both made of heat-insulating material; the panel unit and back panel unit are both made of aluminum alloy; the core layer unit is made of aluminum foil or plastic.

Citation Information

Patent Citations

  • Heat -resisting heat preservation aluminum honeycomb panel

    CN206614867U

  • Aluminum veneer with good heat insulation property

    CN221399644U