Double-layer sealed heat-preservation air pipe

Abstract

The utility model provides a kind of double-layer sealing heat preservation air pipe, it is related to air pipe field, including air pipe body, the outer wall of air pipe body is fixedly connected with nano aerogel heat resistance layer, in the utility model, by adopting the multilayer structure of air pipe body, nano aerogel heat resistance layer, gradient pore noise reduction heat preservation layer and reflection protection layer, fundamentally solve the problem of traditional air pipe poor heat preservation effect, high air leakage rate, each layer function is mutually coordinated, forms from heat barrier, noise absorption to the whole chain guarantee system of external protection, significantly improve the stability and durability of air pipe system, in addition, the combination design of connecting frame and sealing pad is adopted to the outer wall of reflection protection layer, cooperate with the assembly structure of standardization first connecting hole, effectively ensure the tightness of air pipe splicing, reduce the heat loss and air leakage problem caused by connecting gap, to improve the operation efficiency of ventilation system, reduce energy loss.

Description

Technical Field

[0001] This utility model relates to the field of air ducts, and in particular to a double-layer sealed and insulated air duct. Background Technology

[0002] Air ducts, also known as ventilation ducts, are pipeline systems used to transport air or gas. They are widely used in construction, industry, transportation and other fields. Their main function is to transport air from one place to another, and they are commonly used for ventilation, air conditioning, smoke extraction, dust removal and other scenarios.

[0003] A double-layer sealed insulated air duct is a ventilation duct system with high-efficiency insulation and sealing performance, which is usually used in central air conditioning, HVAC systems or other industrial or building scenarios that require heat preservation for gas transportation.

[0004] In the prior art, such as the Chinese announcement number CN215523694U, there is an air conditioning heating and ventilation duct structure, which includes a duct body. The duct body is composed of a primary duct and a secondary duct. The inner walls of the primary duct and the secondary duct are provided with a reinforcing layer, and the reinforcing layer is composed of magnesium plate, color steel plate and centrifugal glass wool stacked and composite.

[0005] The aforementioned application achieves a robust and reliable connection through the coordinated operation of multiple components. However, in practical applications, pipelines typically employ a single-layer structure or ordinary insulation structure, resulting in significant heat loss and poor insulation performance during the heating process. Utility Model Content

[0006] This invention forms a complete protection system from heat insulation and noise absorption to external protection, which significantly improves the stability and durability of the duct system and solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a double-layer sealed heat-insulating air duct, comprising an air duct body, a nano-aerogel heat-insulating layer fixedly connected to the outer wall of the air duct body, a gradient pore noise-reducing heat-insulating layer fixedly connected to the outer wall of the nano-aerogel heat-insulating layer, a reflective protective layer fixedly connected to the outer wall of the gradient pore noise-reducing heat-insulating layer, a set of connecting frames fixedly connected to the outer wall of the reflective protective layer, and a set of sealing gaskets fixedly connected to the outer wall of the connecting frames. Both the sealing gaskets and the outer walls of the connecting frames are provided with first connecting holes. Through the above components, a complete heat insulation, noise reduction, and protection system is constructed, solving the problems of poor heat insulation and high air leakage rate of traditional air ducts from the basic structural perspective.

[0008] Preferably, a set of fixing rods is fixedly connected to the top of the reflective protective layer, and a set of fixing plates is fixedly connected to the top end face of the fixing rods. Each fixing plate has a second connecting hole on its top. The fixing rods and fixing plates provide reliable suspension for the duct body. The second connecting holes enable a firm connection with the building's load-bearing structure, preventing the duct body from shifting or falling off due to vibration or its own weight during long-term operation.

[0009] Preferably, the nano-aerogel heat-insulating layer is made of silica nano-aerogel felt. Silica nano-aerogel felt has an extremely low thermal conductivity, which can minimize the heat exchange between the duct body and the outside environment, significantly reduce energy loss during the heating or cooling process, and improve the heat preservation and energy-saving effect. In addition, the material is lightweight (density 100-200kg / m³), which will not increase the overall weight of the duct body, and it is resistant to high and low temperatures (-200℃ to 650℃), making it suitable for long-term use under different ambient temperatures.

[0010] Preferably, the gradient porosity noise reduction and heat insulation layer is made of open-cell polyurethane foam, with the porosity increasing gradually from the inside to the outside. The porosity of the inner layer is 60%-70%, and the porosity of the outer layer is 80%-90%. The porosity of the open-cell polyurethane foam increases gradually from the inside to the outside (60%-70% to 80%-90%). This enhances the heat insulation effect through the principle of stepped air barrier. Compared with a single porosity structure, heat loss is reduced by 15%-20%. The small pores in the inner layer absorb high-frequency airflow noise (such as airflow friction howling), while the large pores in the outer layer attenuate low-frequency vibration noise (such as fan operation roar) through air resonance, thus improving the acoustic environment of the system operation.

[0011] Preferably, the reflective protective layer is made of aluminum foil composite fiberglass cloth, with the aluminum foil side facing the gradient pore noise reduction and heat insulation layer. The aluminum foil side of the aluminum foil composite fiberglass cloth faces the heat insulation layer, reducing the intrusion of external heat into the duct body and further enhancing the heat insulation effect. In addition, the outer layer of fiberglass cloth has tear resistance, aging resistance, and moisture-proof properties, which can protect the inner heat insulation layer from mechanical damage and water vapor erosion, and extend the service life of the heat insulation structure.

[0012] Preferably, the sealing gasket is made of self-healing silicone rubber material and contains isocyanate microcapsule repair agent. When the sealing gasket develops microcracks due to aging or friction, the microcapsules rupture, release the repair agent, and automatically heal, solving the problem of traditional sealing gaskets needing to be replaced regularly.

[0013] Preferably, an antibacterial and anti-mildew purification layer is fixedly connected to the inner wall of the duct body. The antibacterial and anti-mildew purification layer acts directly on the inner wall of the duct body, which can inhibit the growth of bacteria such as Escherichia coli and Staphylococcus aureus and mold, and prevent microbial pollution in the duct body from spreading to the room through airflow. It is especially suitable for scenarios with high air quality requirements such as hospitals, food workshops, and laboratories, reducing the risk of cross-infection in air conditioning systems and improving indoor environmental safety.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0015] 1. This utility model fundamentally solves the problems of poor insulation and high air leakage rate of traditional air ducts by adopting a multi-layer structure consisting of a duct body, a nano-aerogel heat-insulating layer, a gradient pore noise-reducing insulation layer, and a reflective protective layer. The functions of each layer work together to form a complete chain protection system from heat insulation and noise absorption to external protection, which significantly improves the stability and durability of the air duct system. In addition, the outer wall of the reflective protective layer adopts a combination design of connecting frame and sealing gasket, combined with a standardized first connecting hole assembly structure, which effectively ensures the tightness of the air duct splice, reduces heat loss and air leakage caused by connection gaps, thereby improving the operating efficiency of the ventilation system and reducing energy consumption.

[0016] 2. In this utility model, the nano-aerogel heat-insulating layer achieves efficient heat preservation and energy saving; the gradient pore noise-reducing heat preservation layer balances heat preservation performance and noise reduction effect; the reflective protective layer effectively blocks radiant heat and provides structural protection; and the antibacterial and anti-mildew purification layer equipped on the inner wall of the duct body can directly inhibit the growth of bacteria such as Escherichia coli and Staphylococcus aureus, as well as mold, preventing microbial pollution in the duct from spreading to the room through airflow. This design is especially suitable for places with high air quality requirements such as hospitals, food workshops, and laboratories, and can effectively reduce the risk of cross-infection caused by air conditioning systems, and improve the safety and health level of the indoor environment. Attached Figure Description

[0017] Figure 1 This utility model provides a perspective view of the main structure of a double-layer sealed and insulated air duct.

[0018] Figure 2 This invention presents an enlarged perspective view of the structure of a double-layer sealed heat-insulating duct with interconnected nano-aerogel heat-insulating layers.

[0019] Legend: 1. Duct body; 2. Antibacterial and mildew-proof purification layer; 3. Sealing gasket; 4. First connection hole; 5. Connecting frame; 6. Fixing rod; 7. Fixing plate; 8. Second connection hole; 9. Reflective protective layer; 10. Gradient pore noise reduction and heat insulation layer; 11. Nano aerogel heat insulation layer. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] Please see Figures 1-2 This utility model provides a technical solution: a double-layer sealed heat-insulating air duct, including an air duct body 1, a nano-aerogel heat-insulating layer 11 fixedly connected to the outer wall of the air duct body 1, a gradient pore noise-reducing heat-insulating layer 10 fixedly connected to the outer wall of the nano-aerogel heat-insulating layer 11, a reflective protective layer 9 fixedly connected to the outer wall of the gradient pore noise-reducing heat-insulating layer 10, a set of connecting frames 5 fixedly connected to the outer wall of the reflective protective layer 9, and a set of sealing gaskets 3 fixedly connected to the outer wall of the connecting frames 5. The outer walls of the sealing gaskets 3 and the connecting frames 5 are both provided with first connecting holes 4. Through the above components, a complete heat preservation, noise reduction and protection system is constructed, which solves the problems of poor heat preservation effect and high air leakage rate of traditional air ducts from the basic structure.

[0023] like Figure 1 As shown, a set of fixing rods 6 are fixedly connected to the top of the reflective protective layer 9, and a set of fixing plates 7 are fixedly connected to the top end face of the fixing rods 6. The top of each fixing plate 7 is provided with a second connecting hole 8. The fixing rods 6 and fixing plates 7 provide reliable suspension for the duct body 1. The second connecting hole 8 can realize a firm connection with the building load-bearing structure, and prevent the duct body 1 from shifting or falling off due to vibration or its own weight during long-term operation.

[0024] like Figure 2 As shown, the nano-aerogel heat-insulating layer 11 is made of silica nano-aerogel felt. Silica nano-aerogel felt has an extremely low thermal conductivity, which can minimize the heat exchange between the duct body 1 and the outside world, significantly reduce energy loss during the heating or cooling process, and improve the heat preservation and energy-saving effect. In addition, the material is lightweight (density 100-200kg / m³), which will not increase the overall weight of the duct body 1, and it is resistant to high and low temperatures (-200℃ to 650℃), making it suitable for long-term use under different ambient temperatures.

[0025] like Figure 2As shown, the gradient porosity noise reduction and heat insulation layer 10 is made of open-cell polyurethane foam, and the porosity increases in a gradient from the inside to the outside. The porosity of the inner layer is 60%-70%, and the porosity of the outer layer is 80%-90%. The porosity of the open-cell polyurethane foam increases in a gradient from the inside to the outside (60%-70% to 80%-90%). The heat insulation effect is enhanced through the principle of stepped air barrier. Compared with a single porosity structure, heat loss is reduced by 15%-20%. The small pores in the inner layer absorb high-frequency airflow noise (such as airflow friction howling), and the large pores in the outer layer attenuate low-frequency vibration noise (such as fan operation roar) through air resonance, thus improving the acoustic environment of the system operation.

[0026] like Figure 2 As shown, the reflective protective layer 9 is made of aluminum foil composite fiberglass cloth, with the aluminum foil side facing the gradient pore noise reduction and heat insulation layer 10. The aluminum foil side of the aluminum foil composite fiberglass cloth faces the heat insulation layer, reducing the intrusion of external heat into the duct body 1 and further enhancing the heat insulation effect. In addition, the outer layer of fiberglass cloth has tear resistance, aging resistance and moisture resistance, which can protect the inner heat insulation layer from mechanical damage and water vapor erosion, and extend the service life of the heat insulation structure.

[0027] like Figure 2 As shown, the sealing gasket 3 is made of self-healing silicone rubber and contains isocyanate microcapsule repair agent. When the sealing gasket 3 develops microcracks due to aging or friction, the microcapsules rupture to release the repair agent and heal automatically, solving the problem of traditional sealing gaskets 3 needing to be replaced regularly.

[0028] like Figure 1 As shown, an antibacterial and anti-mildew purification layer 2 is fixedly connected to the inner wall of the duct body 1. The antibacterial and anti-mildew purification layer 2 acts directly on the inner wall of the duct body 1, which can inhibit the growth of bacteria such as Escherichia coli and Staphylococcus aureus and mold, and prevent microbial pollution in the duct body 1 from spreading to the room through airflow. It is especially suitable for scenarios with high air quality requirements such as hospitals, food workshops, and laboratories, reducing the risk of cross-infection in air conditioning systems and improving the safety of the indoor environment.

[0029] The device's operation and working principle: Based on the synergistic effect of its multi-layered structure, it achieves efficient heat preservation, sealing, noise reduction, and health protection. The duct body 1 serves as the core airflow channel, with an antibacterial and anti-mildew purification layer 2 on its inner wall. This layer directly acts on the flowing air, effectively inhibiting the growth of bacteria such as Escherichia coli and Staphylococcus aureus, as well as mold, preventing microbial contamination from spreading into the indoor environment with the airflow. The outer wall of the duct body 1 is sequentially composited with a nano-aerogel heat-insulating layer 11, a gradient pore noise-reducing heat-insulating layer 10, and a reflective protective layer 9, achieving integrated optimization of multiple functions. The nano-aerogel heat-insulating layer 11 uses silica nano-aerogel felt with extremely low thermal conductivity, significantly reducing heat exchange between the inside and outside of the duct through physical barriers. The gradient pore noise-reducing heat-insulating layer 10 is composed of open-cell polyurethane foam, with an inner layer having a low porosity of 60%-70% that absorbs heat through dense small pores. The high-frequency airflow whistling is absorbed, while the high porosity of the outer layer (80%-90%) utilizes air resonance to attenuate the low-frequency roar of the fan. The reflective protective layer 9 adopts an aluminum foil composite fiberglass cloth structure, in which the aluminum foil reflects more than 90% of the environmental heat radiation facing the insulation layer, effectively reducing the intrusion of external heat. The outer fiberglass cloth has excellent mechanical strength and moisture-proof performance, protecting the internal structure from damage. The outer wall of the reflective protective layer 9 is equipped with a connecting frame 5 and a sealing gasket 3, and the sealing splicing between the duct sections is achieved through the first connecting hole 4. The sealing gasket 3 is made of self-healing silicone rubber material with built-in isocyanate microcapsule repair agent, which can automatically heal when micro-cracks occur, significantly improving the system's sealing performance. Through the synergistic effect of the above-mentioned layers, a complete chain operation system from airflow purification and heat blocking to noise control is constructed, achieving the goal of efficient, energy-saving, stable, and durable operation of the ventilation system.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A double-layer sealed heat-insulating air duct, comprising an air duct body (1), characterized in that: The outer wall of the duct body (1) is fixedly connected to a nano aerogel heat-insulating layer (11), the outer wall of the nano aerogel heat-insulating layer (11) is fixedly connected to a gradient pore noise reduction and heat insulation layer (10), the outer wall of the gradient pore noise reduction and heat insulation layer (10) is fixedly connected to a reflective protective layer (9), the outer wall of the reflective protective layer (9) is fixedly connected to a set of connecting frames (5), the outer wall of the connecting frames (5) is fixedly connected to a set of sealing gaskets (3), and the outer walls of the sealing gaskets (3) and the connecting frames (5) are both provided with a first connecting hole (4).

2. The double-layer sealed heat-insulating air duct according to claim 1, characterized in that: A set of fixing rods (6) are fixedly connected to the top of the reflective protective layer (9), and a set of fixing plates (7) are fixedly connected to the top end face of the fixing rods (6). The top of each fixing plate (7) is provided with a second connecting hole (8).

3. The double-layer sealed heat-insulating air duct according to claim 1, characterized in that: The nano-aerogel heat-insulating layer (11) is made of silica nano-aerogel felt material.

4. The double-layer sealed heat-insulating air duct according to claim 1, characterized in that: The gradient pore noise reduction and heat insulation layer (10) is made of open-cell polyurethane foam, and the porosity increases gradually from the inside to the outside, with the inner layer porosity being 60%-70% and the outer layer porosity being 80%-90%.

5. The double-layer sealed heat-insulating air duct according to claim 1, characterized in that: The reflective protective layer (9) is made of aluminum foil composite fiberglass cloth, with the aluminum foil side facing the gradient pore noise reduction and heat insulation layer (10).

6. The double-layer sealed heat-insulating air duct according to claim 1, characterized in that: The sealing gasket (3) is made of self-healing silicone rubber and contains isocyanate microcapsule repair agent.

7. The double-layer sealed heat-insulating air duct according to claim 1, characterized in that: The inner wall of the duct body (1) is fixedly connected with an antibacterial and mildew-proof purification layer (2).

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