Floor air supply pipeline and fresh air system

Abstract

The utility model discloses a floor air supply duct and a fresh air system. The floor air supply duct comprises a shell, the shell forms an air duct and is coated with a noise reduction and heat-insulating layer, the material of the noise reduction and heat-insulating layer is a nanoporous aerogel composite material, and under the same heat preservation and noise reduction effect, compared with a traditional double-layer structure of a heat-insulating layer and a noise reduction layer, the thickness of the noise reduction and heat-insulating layer provided by the utility model is only 1 / 3-1 / 5 of that of the traditional material, which can effectively reduce the cross-sectional size of the floor air supply duct, thereby reducing the floor thickness of the space for laying the floor air supply duct, with obvious space benefits, while improving assembly efficiency, the service life of the nanoporous aerogel composite material is longer than that of traditional materials, reducing material replacement, extending the service life of the fresh air system, and reducing maintenance costs.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning equipment, in particular to a ground air supply pipeline and a fresh air system. Background Art

[0002] The fresh air system is a system used for ventilation and air treatment, and is usually used in places with strict requirements on indoor air environment. In the existing technology, the ground air supply fresh air system provides a ground air supply pipeline buried under the indoor ground to transport the fresh air introduced by the fresh air fan to each indoor space.

[0003] The height of the floor air supply duct affects the floor thickness. If the height of the floor air supply duct is too large, the floor thickness will need to be increased according to the height of the floor air supply duct, thereby increasing the project cost. In the prior art, the outer layer of the floor air supply duct needs to be provided with a double-layer structure of a thermal insulation layer and a noise reduction layer to achieve the effect of thermal insulation and noise reduction. Not only is the assembly efficiency low, but it also increases the height of the floor air supply duct, thereby affecting the floor thickness. Utility Model Content

[0004] The utility model aims to provide a floor air supply duct and a fresh air system which utilize a composite material layer to replace an original double-layer structure so as to reduce the overall height and improve the assembly efficiency.

[0005] In order to solve the above technical problems, the utility model provides a ground air supply pipeline, comprising:

[0006] a housing having an air duct formed therein; and

[0007] The noise reduction and heat preservation layer is coated on the outer periphery of the shell, and the noise reduction and heat preservation layer is a nanoporous aerogel composite material.

[0008] In one embodiment, the noise reduction and thermal insulation layer is a silica nanoporous aerogel composite material.

[0009] In one embodiment, the silica nanoporous aerogel composite material is formed by secondary composite of silica nanoporous aerogel and fiber cotton.

[0010] In one embodiment, the thickness d of the noise reduction and thermal insulation layer is less than or equal to 30 mm.

[0011] In one embodiment, the cross-section of the air duct is long and extends laterally, and the shell includes a top wall located on the upper side of the air duct and a bottom wall located on the lower side of the air duct. A plurality of reinforcing ribs spaced apart laterally are connected between the top wall and the bottom wall, and each of the reinforcing ribs extends along the air supply direction of the ground air supply duct.

[0012] In one embodiment, each of the reinforcing ribs is parallel to the vertical direction; and / or,

[0013] The plurality of reinforcing ribs divide the air duct into a plurality of flow channels arranged side by side in the transverse direction. The maximum dimension of each flow channel in the transverse direction is L, and the maximum dimension in the vertical direction is H, and L / H is less than or equal to 3.

[0014] In one embodiment, the plurality of reinforcing ribs are integrally formed with the shell.

[0015] In one embodiment, the shell further includes two side walls located on both sides of the air duct in the horizontal direction, and a ground locking bracket is respectively arranged on the outer side of each side wall, and each ground locking bracket includes a first mounting plate parallel to the vertical direction, and a second mounting plate parallel to the horizontal direction, the first mounting plate intersects with the second mounting plate, the first mounting plate is welded to the corresponding side wall, and the second mounting plate is provided with a mounting hole, and is used to be fixed to the bearing surface by bolts passing through the mounting hole.

[0016] In order to solve the above technical problems, the utility model provides a fresh air system, comprising:

[0017] New air blower;

[0018] The floor air supply duct as described above is arranged below the fresh air fan, and the floor air supply duct is used to be arranged close to the bearing surface.

[0019] In one embodiment, the cross section of the air duct is long and extends in the transverse direction, the shell includes a top wall located on the upper side of the air duct, and a bottom wall located on the lower side of the air duct, and a plurality of reinforcing ribs spaced apart in the transverse direction are connected between the top wall and the bottom wall, and each of the reinforcing ribs extends in the air supply direction of the ground air supply duct;

[0020] The fresh air system also includes an air distribution box and an air supply member, the air distribution box and the air supply member are respectively provided with connecting members, and are respectively connected to the ground air supply duct through the connecting members, the connecting members are used to be inserted into the ground air supply duct, and include two transverse walls and two vertical walls, the two transverse walls are arranged side by side in the vertical direction, and are respectively provided with a plurality of slots, the plurality of slots of the two transverse walls are aligned in the vertical direction, and are used to correspondingly accommodate a plurality of the reinforcing ribs, and the two vertical walls are arranged side by side in the transverse direction.

[0021] The technical solution provided by the utility model has the following advantages:

[0022] The utility model provides a floor air supply duct and a fresh air system. The floor air supply duct includes a shell, the shell forms an air duct and is covered with a noise reduction and thermal insulation layer, the material of the noise reduction and thermal insulation layer is a nanoporous aerogel composite material. Under the same thermal insulation and noise reduction effect, compared with the traditional double-layer structure of a thermal insulation layer plus a noise reduction layer, the thickness of the noise reduction and thermal insulation layer provided by the utility model is only 1 / 3-1 / 5 of that of the traditional material, which can effectively reduce the cross-sectional size of the floor air supply duct, thereby reducing the floor thickness of the space for laying the floor air supply duct, with obvious space benefits. While improving assembly efficiency, the service life of the nanoporous aerogel composite material is longer than that of traditional materials, reducing material replacement, extending the service life of the fresh air system, and reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A three-dimensional structural diagram of an embodiment of a fresh air system provided by the utility model;

[0025] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a central air supply pipeline;

[0026] Figure 3 for Figure 2 Schematic diagram of the cross section of the central ground air supply duct;

[0027] Figure 4 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0028] Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the connecting part.

[0029] Description of reference numerals:

[0030] 100-ground air supply duct; 10-shell; 11-top wall; 12-bottom wall; 13-side wall; 101-air duct; 102-flow channel; 20-reinforcement rib; 30-noise reduction and insulation layer; 40-ground locking bracket; 41-first mounting plate; 42-second mounting plate; 50-connecting piece; 51-horizontal wall; 52-vertical wall; 53-slot; 200-fresh air system; 201-fresh air fan; 202-air distribution box; 203-air supply part. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all of the embodiments. The utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0033] See also Figure 1 The utility model provides a fresh air system 200, the indoor air outlet end of which is arranged on the ground surface or near the ground. Furthermore, the fresh air system 200 includes a fresh air fan 201, a floor air supply pipeline 100, an air distribution box 202 and an air supply member 203. The fresh air fan 201 is usually installed on a wall or a ceiling, and is connected to the air distribution box 202 through an air inlet pipeline extending in the up-down direction. The air distribution box 202 is connected to a plurality of floor air supply pipelines 100. The floor air supply pipeline 100 is arranged below the fresh air fan 201 and buried under the ground to distribute the fresh air flow to each room through the air supply member 203 arranged at its end. The air supply member 203 is usually provided with an upward air outlet. Generally speaking, the floor air supply pipeline 100 can be buried in the floor above the bearing surface and below the ground. Preferably, the floor-to-floor air supply duct 100 is disposed against a bearing surface. In this embodiment, the bearing surface refers to the top surface of the load-bearing structure of the space served by the fresh air system 200, such as the top surface of the structural board of the room.

[0034] See also Figures 2 to 4 The utility model provides a floor air supply duct 100. The floor air supply duct 100 includes a shell 10 and a noise reduction and thermal insulation layer 30. The material structure of the shell 10 is not limited, for example, it can be metal or engineering plastic. An air duct 20 is formed in the shell 10, and the air duct 20 extends along the air supply direction, so the shell 10 is basically long, and its length direction extends along the air supply direction. The cross-sectional shape and size of the shell 10 in the length direction are not limited. Generally speaking, in order to meet the air supply volume and meet the site installation requirements, its cross-section can be designed to be a flat shape with a smaller height and a larger lateral width. It should be noted that in the utility model, the vertical direction refers to the direction extending parallel to gravity, the horizontal direction is perpendicular to the vertical direction and parallel to the horizontal plane, and the lateral direction refers to the direction perpendicular to the air supply direction and parallel to the horizontal plane.

[0035] Please continue reading Figure 3The outer periphery of the shell 10 is coated with a noise reduction and heat preservation layer 30, and the noise reduction and heat preservation layer 30 is a nanoporous aerogel composite material. In the utility model, the nanoporous aerogel composite material refers to a flexible coiled material made by secondary compounding of aerogel and a substrate. Structurally, the nanoporous aerogel composite material has a nanoscale pore structure with a pore size between 30 and 50 nanometers. Its highly nanoscale pore size can effectively restrict the free movement of air molecules, causing the airflow to adhere to the pore wall and unable to form effective convection, thereby greatly reducing the transfer of heat. In addition, its internal complex three-dimensional interconnected network structure also extends the heat transfer path of heat transmitted through the solid, further enhancing its thermal insulation performance.

[0036] The specific components of nanoporous aerogel can be silica aerogel, alumina aerogel, zirconia aerogel or carbon aerogel. In a preferred embodiment, the noise reduction and thermal insulation layer 30 is a silica nanoporous aerogel composite material. Silica aerogel has the characteristics of ultra-lightness, high specific surface area, high porosity and extremely low thermal conductivity, which makes it excellent in thermal insulation, sound insulation and noise reduction performance, and the manufacturing technology is mature. It is usually prepared by nano-scale silica particles through a sol-gel method.

[0037] The specific components of the substrate can also be selected as needed, for example, it can be fiber cotton, glass fiber, ceramic fiber, etc. In a preferred embodiment, the silica nanoporous aerogel composite material is formed by secondary compounding of silica nanoporous aerogel and fiber cotton. In this way, a single-layer composite material layer is formed, in which the silica nanoporous aerogel plays a good heat insulation role, and the fiber cotton plays a good shock and noise reduction performance while playing a heat insulation role.

[0038] In this embodiment, a single-layer composite material layer, that is, a silica nanoporous aerogel-fiber cotton composite material is used to replace the double-layer structure of the thermal insulation layer and the noise reduction layer in the prior art, and under the same thermal insulation and noise reduction effect, its thickness d is greatly reduced compared with traditional materials, and can reach 1 / 5-1 / 3 of the thickness of traditional materials, thereby effectively reducing the cross-sectional size of the ground air supply pipeline 100, and then reducing the thickness of the space floor for laying the ground air supply pipeline, and the space benefit is obvious. In addition, during the production process, only a single layer of material needs to be coated on the outside of the shell 10, which is more efficient than the double-layer structure. In a preferred embodiment, the thickness d of the noise reduction and thermal insulation layer 30 is less than or equal to 30 mm. At the same time, the composite material also has excellent aging resistance, and its service life is longer than that of traditional materials, which can reach 3-5 times the service life of traditional materials, thereby reducing material replacement, extending the service life of the fresh air system 200, and reducing maintenance costs.

[0039] The process steps of secondary compounding of silica aerogel and fiber cotton may include:

[0040] S1, solution preparation: First, the silica aerogel powder needs to be dissolved in a suitable solvent to form an aerogel powder solution.

[0041] S2, immersion composite: Next, the substrate (fiber cotton) to be composited is immersed in the prepared aerogel powder solution; this process needs to ensure that the substrate can be fully immersed in the solution, so that the aerogel powder can be evenly distributed on the surface and / or inside of the substrate. The immersion method can be selected according to the actual situation, such as normal pressure immersion, negative pressure immersion, circulation tube immersion, extrusion immersion, etc., as long as the aerogel solution can fully infiltrate the substrate.

[0042] S3, drying treatment: After the soaking is completed, the substrate is taken out and placed in a drying device for drying treatment; the purpose of drying is to remove excess solvent in the substrate so that the aerogel powder forms a stable coating or structure on the substrate.

[0043] S4, subsequent treatment: According to the specific composite material and performance requirements, other subsequent treatments such as aging, supercritical drying, etc. can be carried out to further enhance the bonding force between the aerogel and the substrate and improve the performance of the composite material.

[0044] Please continue reading Figure 3 The cross section of the air duct 101 is long and extends in the transverse direction. The shell 10 includes a top wall 11 located on the upper side of the air duct 101 and a bottom wall 12 located on the lower side of the air duct 101. A plurality of reinforcing ribs 20 are connected between the top wall 11 and the bottom wall 12 and are distributed in the transverse direction at intervals. Each of the reinforcing ribs 20 extends in the air supply direction of the ground air supply duct 100, and each of the reinforcing ribs 20 is parallel to the vertical direction. Preferably, the plurality of reinforcing ribs 20 divide the air duct 101 into a plurality of flow channels 102 arranged side by side in the transverse direction. The maximum dimension of each of the flow channels 102 in the transverse direction is L, and the maximum dimension in the vertical direction is H, and L / H is less than or equal to 3. In this embodiment, the reinforcing ribs 20 play a supporting role for the shell 10 in the vertical direction, so as to avoid the phenomenon that the ground air supply duct 100 has too low rigidity in the vertical direction and is stepped on and collapsed during the construction process.

[0045] Each of the reinforcing ribs 20 can be respectively connected and fixed to the shell 10, for example, can be screwed or welded to the shell 10. In a preferred embodiment, a plurality of the reinforcing ribs 20 are integrally formed with the shell 10 to facilitate manufacturing.

[0046] For further information, please refer to Figure 2 and Figure 4The shell 10 also includes two side walls 13 located on both sides of the air duct 101 in the horizontal direction. A ground locking bracket 40 is respectively arranged on the outer side of each side wall 13. Each ground locking bracket 40 includes a first mounting plate 41 parallel to the vertical direction and a second mounting plate 42 parallel to the horizontal direction. The first mounting plate 41 intersects with the second mounting plate 42. The first mounting plate 41 is welded to the corresponding side wall 13. The second mounting plate 42 is provided with a mounting hole and is used to be fixed to the bearing surface by bolts passing through the mounting hole. For example, the ground air supply duct 100 is firmly installed and fixed to the bearing surface to prevent it from shifting during construction or backfilling the floor, and to reduce the vibration of the ground air supply duct 100 and reduce noise.

[0047] Please refer to Figure 1 and Figure 5 The fresh air system 200 also includes an air distribution box 202 and an air supply member 203. The air distribution box 202 and the air supply member 203 are respectively provided with connecting members 50, and are respectively connected to the ground air supply duct 100 through the connecting members 50. The connecting member 50 is used to be inserted into the ground air supply duct 100, and includes two transverse walls 51 and two vertical walls 52. The two transverse walls 51 are arranged side by side in the vertical direction and are respectively provided with a plurality of slots 53. The plurality of slots 53 of the two transverse walls 51 are aligned in the vertical direction and are used to correspondingly accommodate a plurality of the reinforcing ribs 20. The two vertical walls 52 are arranged side by side in the transverse direction. In this embodiment, the slot 53 on the connecting piece 50 is plugged into the reinforcing rib 20 so that the floor air supply duct 100 is firmly fixed to the air distribution box 202 or the air supply member 203 through the connecting piece 50, thereby preventing the floor air supply duct 100 from becoming loose from the air distribution box 202 or the air supply member 203.

[0048] Obviously, the above described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, ordinary technicians in this field can make other different forms of changes or modifications without creative work, which should fall within the scope of protection of the utility model.

Claims

1. A ground air supply pipeline, characterized in that: include: a housing, wherein an air duct is formed in the housing; and A noise reduction and heat preservation layer, coated on the outer periphery of the shell, wherein the noise reduction and heat preservation layer is configured as a single layer and is a nanoporous aerogel composite material; Among them, the cross-section of the air duct is long and extends laterally, and the shell includes a top wall located on the upper side of the air duct and a bottom wall located on the lower side of the air duct. A plurality of reinforcing ribs distributed at intervals along the laterally are connected between the top wall and the bottom wall, and each of the reinforcing ribs extends along the air supply direction of the ground air supply duct.

2. The floor air supply pipeline according to claim 1, characterized in that: The noise reduction and heat insulation layer is a silicon dioxide nanoporous aerogel composite material.

3. The floor air supply pipeline according to claim 1 or 2, characterized in that: The thickness d of the noise reduction and thermal insulation layer is less than or equal to 30 mm.

4. The floor air supply pipeline according to claim 1, characterized in that: Each of the reinforcing ribs is parallel to the vertical direction; and / or, The plurality of reinforcing ribs divide the air duct into a plurality of flow channels arranged side by side in the transverse direction. The maximum dimension of each flow channel in the transverse direction is L, and the maximum dimension in the vertical direction is H, and L / H is less than or equal to 3.

5. The floor air supply pipeline according to claim 1, characterized in that: The plurality of reinforcing ribs are integrally formed with the shell.

6. The floor air supply pipeline according to claim 1, characterized in that: The shell also includes two side walls located on both sides of the air duct in the horizontal direction, and a ground locking bracket is respectively arranged on the outer side of each side wall, and each ground locking bracket includes a first mounting plate parallel to the vertical direction and a second mounting plate parallel to the horizontal direction, the first mounting plate intersects with the second mounting plate, the first mounting plate is welded to the corresponding side wall, and the second mounting plate is provided with a mounting hole, and is used to be fixed to the bearing surface by bolts passing through the mounting hole.

7. A fresh air system, characterized in that: include: New air blower; The floor air supply duct as described in any one of claims 1 to 6 is arranged below the fresh air fan, and the floor air supply duct is used to be arranged against a bearing surface.

8. The fresh air system according to claim 7, characterized in that: The cross section of the air duct is long and extends in the transverse direction. The shell includes a top wall located on the upper side of the air duct and a bottom wall located on the lower side of the air duct. A plurality of reinforcing ribs spaced apart in the transverse direction are connected between the top wall and the bottom wall. Each of the reinforcing ribs extends in the air supply direction of the ground air supply pipeline. The fresh air system also includes an air distribution box and an air supply member, the air distribution box and the air supply member are respectively provided with connecting members, and are respectively connected to the ground air supply duct through the connecting members, the connecting members are used to be inserted into the ground air supply duct, and include two transverse walls and two vertical walls, the two transverse walls are arranged side by side in the vertical direction, and are respectively provided with a plurality of slots, the plurality of slots of the two transverse walls are aligned in the vertical direction, and are used to correspondingly accommodate a plurality of the reinforcing ribs, and the two vertical walls are arranged side by side in the transverse direction.

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