Hoisting type heat preservation air pipe and system

Abstract

The utility model provides a hoisting type heat preservation air pipe and system, and is applied to the technical field of hoisting heat preservation air pipes. The pipe body is coated with the heat preservation layer; the hoisting assembly comprises a bearing piece and a hoisting rod. The heat preservation layer further comprises at least one heat preservation layer supporting piece which divides the heat preservation layer into a supporting heat preservation area and a non-supporting heat preservation area. The supporting heat preservation area is divided into an inner-layer heat preservation sub-area and an outer-layer heat preservation sub-area by the heat preservation layer supporting piece, the inner-layer heat preservation sub-area is located between the supporting section and the pipe body, the outer-layer heat preservation sub-area is located outside the supporting section, and the volume weight of the inner-layer heat preservation sub-area is smaller than that of the outer-layer heat preservation sub-area; by designing the heat preservation layer supporting piece and the double-heat-preservation-layer structure at the hoisting position, the compression amount of the heat preservation layers at the hoisting position of the hoisting heat preservation air pipe is reduced, the installation levelness of the hoisting air pipe is improved, and meanwhile the overall heat preservation performance of the air pipe is improved.

Description

Technical Field

[0001] The present application relates to the technical field of thermal insulation air ducts, and in particular to a thermal insulation layer and a hoisting design of a hoisting thermal insulation air duct. Background Art

[0002] The insulation material of the insulated air duct is generally formed through a porous structure with air as a poor thermal conductor to achieve the effect of thermal insulation of the air duct; the hoisting method is generally to support the supporting parts at the bottom of the air duct, and then use two hanging rods to set at both ends of the supporting parts. Due to the heavy weight of the large air duct itself, the part of its insulation layer on the supporting part is easily squeezed, resulting in poor insulation effect here, and the hoisting of the air duct will also cause tilt or horizontal errors.

[0003] Ordinary suspended ducts will be equipped with hanging supports at the hanging point to increase the supporting area of ​​the duct at the hanging point, thereby protecting the pipe structure of the duct and reducing deformation. However, the interior of the insulated duct is in a high temperature state. Directly using supports to fix or weld to the pipe wall will cause the supports to conduct heat inside the pipe. The heat distribution inside the duct will be concentrated at the low-temperature heat dissipation points at the support position, forming a cold bridge effect.

[0004] Based on this, it is necessary to redesign the insulation layer at the installation site of the insulated air duct. While using support parts to enhance the structural strength of the insulation layer of the insulated air duct, the cold bridge effect should be avoided to improve the thermal insulation performance of the air duct. Utility Model Content

[0005] In view of this, an embodiment of the present specification provides a hoisting insulated air duct and system, which designs a double-layer insulation structure at the air duct hoisting point and uses an insulation layer support member to support a part of the insulation material structure, so as to simultaneously achieve the purpose of enhancing the structural strength of the insulation layer, improving the installation level and maintaining the insulation performance.

[0006] To achieve the above objectives, the embodiments of this specification provide the following technical solutions:

[0007] In a first aspect, the present specification provides a hanging heat-insulating air duct, comprising: an air duct body, the air duct body comprising a pipe body and a flange; an insulation layer, the insulation layer covering the pipe body; a hanging assembly, the hanging assembly comprising a supporting member and a hanging rod;

[0008] The insulation layer further comprises at least one insulation layer support member, the insulation layer support member divides the insulation layer into a support insulation area and a non-support insulation area along the extension direction of the air duct, the insulation layer support member comprises at least a connection section and a support section which are bent or fixedly connected, the connection section is fixedly connected to the pipe body, and the support section provides a support surface for the insulation layer in the support insulation area;

[0009] The insulation layer is divided into a double-layer structure of an inner sub-insulation layer and an outer sub-insulation layer by the insulation layer support member in the support insulation area, wherein the inner sub-insulation layer is arranged between the inner side of the support section and the tube wall of the tube body, and the outer sub-insulation layer is arranged between the outer side of the support section and the supporting member, and the bulk density of the inner sub-insulation layer is less than the bulk density of the outer sub-insulation layer;

[0010] Preferably, the thermal insulation layer is a single-layer structure in the non-support thermal insulation area.

[0011] More preferably, the total thickness of the thermal insulation layer in the support thermal insulation area is the same as the thickness in the non-support thermal insulation area.

[0012] In a preferred embodiment, the bulk density of the inner sub-insulation layer of the double-layer structure in the insulation layer is 48 kg / m 3 -100kg / m 3 The outer sub-insulation layer has a bulk density of 100 kg / m 3 -200kg / m 3 Any value in between.

[0013] In order to achieve better thermal insulation performance, in a preferred solution, the thickness of the inner sub-insulation layer in the supporting insulation layer area is greater than or equal to the thickness of the outer sub-insulation layer.

[0014] In the above scheme, the optional insulation layer support member is that the method of fixed connection between the connecting section and the tube body is any one of welding, gluing, clamping, threaded connection, riveting, and integral molding; the method of fixed connection between the supporting section and the connecting section is any one of welding, gluing, clamping, threaded connection, riveting, and integral molding.

[0015] Preferably, the insulation layer support member is a U-shaped bending member, an L-shaped bending member, or a ⊥-shaped support member.

[0016] In the above schemes, the materials used for the insulation layer in the support insulation area and the non-support insulation area are the same or different insulation materials among rock wool, glass wool, silicate board, polystyrene foam and polyurethane foam.

[0017] Optionally, the inner sub-insulation layer and the outer sub-insulation layer of the insulation layer in the supporting insulation zone are made of heterogeneous materials such as rock wool, glass wool, silicate board, polystyrene foam, and polyurethane foam.

[0018] In a second aspect, the present specification provides a hanging insulated air duct system, comprising at least two groups of hanging insulated air ducts as described in any one of the schemes in the first aspect above, and the hanging insulated air ducts are connected by flanges.

[0019] Compared with the prior art, the at least one technical solution adopted in the embodiments of this specification can achieve the following beneficial effects:

[0020] First, the insulation layer of the hoisting insulated air duct at the hoisting position protects the structure of the inner sub-insulation layer through the support member, thereby preventing the weight of the air duct body from being applied to the insulation material of the inner sub-insulation layer, reducing the compression of the insulation layer at the air duct hoisting position, thereby improving the insulation performance of the insulated air duct;

[0021] Second, the insulation layer of the hanging duct is kept as a single-layer structure in the non-support insulation area outside the hanging position, which has better insulation material consistency than the insulation layer design using a multi-layer structure, so that the insulation layer as a whole has better insulation performance, while reducing the complexity of the coating operation and material cost caused by the multi-layer structure, and improving production efficiency;

[0022] Thirdly, the insulation layer support of the hanging type air duct at the hanging position is covered by the outer sub-insulation layer of the insulation layer, which blocks the conduction of heat from the insulation layer support to the inside of the air duct, and avoids the cold bridge effect inside the insulation air duct at the position of the insulation layer support;

[0023] Fourthly, the insulation layer of the hanging type air duct at the hanging position is a double-layer structure, and the bulk density of the material of the outer sub-insulation layer is greater than the bulk density of the material of the inner sub-insulation layer, so that the structural strength of the outer sub-insulation layer is greater than that of the inner sub-insulation layer, and the compression of the outer sub-insulation layer can be reduced. Compared with the existing solution, the compression of the insulation layer of the air duct at the hanging position is greatly reduced, and the horizontality of the air duct after hanging can be effectively improved;

[0024] Fifth, the total thickness of the insulation layer in the supporting insulation area is consistent with the thickness in the non-supporting insulation area, which is convenient for covering and mounting the insulation layer, making the overall appearance of the duct product more concise and convenient for transportation and hoisting;

[0025] Sixth, the thickness of the inner sub-insulation layer of the hanging insulated air duct in the supporting insulation area is greater than the thickness of the outer sub-insulation layer. Under the premise of using the insulation layer support and maintaining the consistency of the overall thickness of the insulation layer, the insulation performance of the insulation layer in the hanging position of the air duct can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1This is a schematic diagram of the structure of the hanging heat-insulating air duct in the first embodiment of the present application;

[0028] Figure 2 It is a detailed enlarged view of the support insulation area A in this application;

[0029] Figure 3 is a schematic structural diagram of the second embodiment of the present application;

[0030] Figure 4 is a schematic structural diagram of the third embodiment of the present application;

[0031] Figure 5 It is a schematic diagram of a hanging type thermal insulation duct system in this application.

[0032] Description of reference numerals:

[0033] 10. Duct body; 11. Duct body; 12. Flange; 20. Insulation layer; 21. Inner sub-insulation layer; 22. Outer sub-insulation layer; 23. Insulation layer support; 231. Connecting section; 232. Support section; 30. Supporting member; 31. Hanger; A. Support insulation area; B. Non-support insulation area. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0035] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0036] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0037] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0038] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0039] During the hoisting process of conventional insulated air ducts, the inventor found that the insulation layer of the air duct at the bearing part was obviously squeezed due to the heavy weight of the air duct body. The air duct and the air duct system were prone to horizontal errors or tilts during the entire hoisting process. In order to ensure the level of the air duct hoisting and prevent tilting, the inventor protected the insulation layer of the air duct by adding supports. At the same time, considering that the introduction of supports by conventional methods will cause the exposed supports to conduct heat inside the air duct and cause a cold bridge problem, the insulation layer of the air duct was designed as a double-layer structure, and the insulation layer supports were used as the supporting surface between the double-layer structures to achieve the purpose of horizontal installation and ensure insulation.

[0040] Based on this, this specification provides a hanging insulated air duct in the first aspect to solve the above-mentioned technical defects existing in the prior art. Figure 1 The figure shows a schematic diagram of the structure of a hoisting heat-insulating air duct according to the first embodiment of the utility model. The hoisting heat-insulating air duct comprises an air duct body 10, an insulation layer 20 and a hoisting assembly, wherein the air duct body 10 comprises a pipe body 11 and a flange 12; the insulation layer 20 covers the pipe body 11; the hoisting assembly comprises a supporting member 30 and a hanging rod 31; in addition, the insulation layer 20 further comprises at least one insulation layer support member 23, and the insulation layer support member 23 divides the insulation layer 20 into a supporting insulation area A and a non-supporting insulation area B along the extension direction of the air duct;

[0041] Figure 2 This is an enlarged view of the details of the support insulation area A described in the first embodiment, as shown Figure 2 As shown, the insulation layer support member 23 is a U-shaped bending member, which is formed into a U-shaped structure of two connecting segments 232 and a supporting segment 231 by bending steel; the two connecting segments 232 can be fixedly connected to the pipe body 10 by any conventional fixing method in the art, such as welding, threaded connection, adhesive connection, clamping, riveting, integral molding, etc., and the fixed connection method can also be detachable or non-detachable, and the fixed connection method should not be understood as limiting the scope of protection of the claims; the supporting segment 231 provides a supporting surface for the insulation layer of the supporting insulation zone A. The insulation layer 20 is divided into a double-layer structure of an inner sub-insulation layer 21 and an outer sub-insulation layer 22 by the insulation layer support member 23 in the supporting insulation zone A, wherein the inner sub-insulation layer 21 is arranged between the upper surface of the supporting segment 232 and the pipe wall of the pipe body 10, and the outer sub-insulation layer 21 is arranged between the outer side of the supporting segment 232 and the supporting member 30. In the present embodiment, the insulation layer of the hoisting position of the hoisting type insulated air duct protects the structure of the inner sub-insulation layer 21 through the insulation layer support 23, thereby preventing the weight of the air duct body from being directly applied to the insulation material of the inner sub-insulation layer 21, reducing the compression of the insulation layer 20 at the air duct hoisting position, thereby improving the insulation performance of the insulated air duct; at the same time, the insulation layer support 23 of the hoisting type air duct at the hoisting position is covered by the outer sub-insulation layer 22, blocking the conduction of heat from the insulation layer support 23 to the inside of the air duct, avoiding the cold bridge effect at the supporting position of the insulation layer support 23 of the insulated air duct, and further improving the insulation performance of the air duct. In addition, in the present embodiment, the bulk density of the inner sub-insulation layer 21 needs to be smaller than the bulk density of the outer sub-insulation layer 22. This arrangement can ensure that the structural strength of the outer sub-insulation layer is greater than that of the inner sub-insulation layer, and can reduce the compression of the outer sub-insulation layer. Compared with the existing scheme, the compression of the insulation layer of the air duct at the hanging position is greatly reduced, and the horizontality of the air duct after hanging can be effectively improved.

[0042] Preferably, the material of the inner sub-insulation layer 21 of the insulation layer 20 in the support insulation area A is selected from a material having a bulk density of 48 kg / m 3 -100kg / m 3 The material of the outer sub-insulation layer 22 is selected from the following materials: rock wool, glass wool, silicate board, polystyrene foam, polyurethane foam, and the bulk density is 100kg / m 3 -200kg / m 3The inner sub-insulation layer material and the outer sub-insulation layer material can be the same material or different materials, but are more preferably the same material with different bulk densities. For example, the inner sub-insulation layer 21 uses a bulk density of 100 kg / m 3 The outer sub-insulation layer 22 is made of rock wool material with a bulk density of 200kg / m 3 rock wool material; and the thickness of the inner sub-insulation layer 21 of the insulation layer 20 of the hoisting insulated air duct in the supporting insulation area A is preferably greater than the thickness of the outer sub-insulation layer 22, which can maximize the insulation performance of the insulation layer 20 in the air duct hoisting position while maintaining the supporting performance to prevent the thickness of the outer sub-insulation layer from being over-compressed. However, it should be understood that the material types, densities, and thicknesses of the inner and outer sub-insulation layers described above are only preferred examples, and those skilled in the art can make specific choices and trade-offs based on actual hoisting needs, but they must all satisfy that the bulk density of the inner sub-insulation layer is less than the bulk density of the outer sub-insulation layer 22, and the material types, densities, and thicknesses of the inner and outer sub-insulation layers should not be understood as limiting the scope of protection of the independent claims.

[0043] like Figure 1 As shown, in the present embodiment, in order to facilitate the coating and mounting of the insulation layer and make the overall appearance of the air duct product more concise and convenient for transportation and lifting, in the preferred scheme of the present embodiment, the total thickness of the insulation layer in the supporting insulation zone is consistent with the thickness of the insulation layer in the non-supporting insulation zone; and different from the double-layer insulation structure of the supporting insulation zone, the insulation layer 20 in the non-supporting insulation zone B is preferably a single-layer structure. The design of the single-layer structure in the non-supporting insulation zone has better consistency of insulation materials than the design scheme of the multi-layer insulation layer, so that the insulation layer 20 as a whole has better insulation performance, and at the same time can reduce the complexity of the coating operation and material cost caused by the multi-layer structure, thereby improving production efficiency. However, it should be understood that this scheme is only a preferred design. Technical personnel in this field can also design the non-support insulation zone B as a double-layer insulation structure the same as the support insulation zone A according to the needs of improving support performance and facilitating adjustment of support position, and design the total thickness of the support insulation zone and the insulation layer thickness of the non-support insulation zone to be different. The number of layers of the non-support insulation zone B and the insulation layer thickness design of the non-support insulation zone B and the support insulation zone A should not be understood as limiting the scope of protection of the independent claim.

[0044] It should also be noted that, in the present embodiment, although the U-shaped bending member is integrally formed into a U-shaped structure of two connecting sections 232 and a supporting section 231 by bending steel, the fixed connection method of the connecting section 232 and the supporting section 231 is only a preferred example, and all methods that can achieve a fixed connection between the two, such as: welding, threaded connection, gluing, clamping, riveting, integral molding, etc. should be included in the protection scope of the claims; in addition, although the number of the insulation layer support members 23 in this section of hoisted insulated air duct is one, it should be understood that the number is only for exemplary purposes, and those skilled in the art can equip different numbers of insulation layer support members according to the number of hoisting supports, and the number should not be understood as a limitation on the protection scope of the claims; in addition, in the first embodiment, Figure 1 The shape of the air duct shown can be understood as a rectangle, and the cross-sectional view shown can be used as a cross-sectional view of the rectangular air duct along the extension direction of the air duct, but the rectangular shape is not used as a limitation of the claims of the first embodiment. Those skilled in the art can design corresponding insulation layer structures and materials that meet the protection scope of the claims based on the actual air duct shape used, and the air duct shape should not be understood as a limitation on the protection scope of the claims.

[0045] Figure 3 The second embodiment of the utility model is shown in FIG. 1 . Compared with the first embodiment, the second embodiment is different in the shape of the insulation layer support member 23. Based on the first embodiment, in order to reduce the production cost, while ensuring the structural strength of the support member, the following can be adopted: Figure 3 The L-shaped bending part shown has only one connecting section 231, which is formed by bending steel with the supporting section 232. This embodiment reduces the steel cost and process cost on the basis of the above embodiments, and at the same time, due to its semi-enclosed structure, it is easier to fill the insulation material between the supporting section 232 and the tube body 11. Those skilled in the art can choose to use any of threaded connection, welding, adhesive connection, clamping, riveting, and integral molding to fix the connecting section and the supporting section according to actual production needs, and the forming means of bending steel should not be understood as a limitation of the claims of this embodiment.

[0046] Figure 4The third embodiment of the utility model is shown as a schematic diagram of the structure. Compared with the first and second embodiments, the difference of the third embodiment is also the shape of the insulation layer support member 23 used. In this embodiment, the insulation layer support member 23 is a ⊥-shaped support member, wherein the upper end of the connecting section 231 is welded to the pipe body 11, and the lower end is welded to the middle of the supporting section 232, so that the supporting section 232 is symmetrical at the welding point, which is more suitable for the insulation air duct with only one set of hoisting components. The symmetrical structure balances the weight of the air duct borne by the connecting section 231, and reduces the risk of fracture at the welding point between the connecting section 231 and the pipe body 11; a space that can accommodate the inner sub-insulation layer 21 is formed between the upper surface of the supporting section 232 and the pipe body 11, and the lower surface is covered with the outer sub-insulation layer 22, and the width of the supporting section 232 is consistent with the outer layer 22 of its lower surface. The ⊥-shaped support member in this embodiment can also be fixedly connected by any one of threaded connection, adhesive connection, clamping connection, riveting, and integrated molding. Those skilled in the art can choose according to actual production conditions.

[0047] In the above embodiments, the thickness of the inner sub-insulation layer 21 and the outer sub-insulation layer 22 of the insulation layer 20 at the support insulation area A should comply with the beneficial effects stated in this specification, and preferably the thickness of the inner layer 21 is greater than or equal to the thickness of the outer layer 22. In a specific embodiment, both the inner layer 21 and the outer layer 22 are made of rock wool material with a thickness of 50 mm, but those skilled in the art can adopt an inner layer 21 of 80 mm and an outer layer 22 of 20 mm according to the spirit of this specification, so as to achieve a better insulation effect while keeping the overall thickness of the insulation layer 20 as consistent as possible.

[0048] The second aspect of the specification also provides a hanging type heat preservation air duct system, such as Figure 5 As shown, the hanging insulated air duct system includes at least two groups of hanging insulated air ducts shown in any of the above embodiments. Two pipe bodies 10 and two groups of butt flanges 11, both groups of air ducts use U-shaped bending parts as insulation layer support parts 23 at the hanging position, the flanges 11 are steel bending parts welded to both ends of the pipe body 10, and the connection between the flanges 11 is a nut and bolt connection. Those skilled in the art can select appropriate flange parts according to actual production needs. In this embodiment, Figure 5 The figure only shows the situation that each group of hoisted insulated air ducts only includes one group of hoisting components, but technical personnel in this field can set two or more groups of hoisting components in a single group of hoisted insulated air ducts according to the actual volume and weight of the air ducts to meet the hoisting requirements of large-volume or heavy-weight insulated air ducts, thereby further satisfying the reduction of the compression of the insulation layer at the hoisting position.

[0049] According to the above-mentioned embodiments of the hanging heat-insulating air duct and system, this specification also provides a hanging heat-insulating air duct hanging method, the steps of which include:

[0050] S1: Determine the supporting position and width of the bottom of the air duct, and reserve a covering gap with the supporting width in the insulation layer;

[0051] S2: Fixing the insulation layer support member having a corresponding supporting width to the supporting position at the bottom of the air duct;

[0052] S3: filling the inner sub-insulation layer material in the insulation layer along the coating gap between the support section of the insulation layer support and the pipe wall, and pasting the outer sub-insulation layer material along the lower surface of the support section of the insulation layer support;

[0053] S4: Wrap the insulation layer on the outer wall of the air duct so that the portion of the insulation layer outside the wrapping gap fits the inner and outer layer materials at the wrapping gap position;

[0054] S5: Fixing the supporting member in the hanging assembly to the supporting position at the bottom of the air duct;

[0055] S6: Connect the lower end of the suspension rod in the suspension assembly to both ends of the supporting member.

[0056] On the basis of the above steps, the method for assembling the hoisting type thermal insulation duct system also includes:

[0057] S7: lift two or more groups of air ducts to the hoisting height, and fix the upper ends of the hoisting rods in the hoisting assembly to the corresponding hoisting points;

[0058] S8: Fix and connect two or more groups of air ducts with corresponding flanges.

[0059] In this specification, the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments described later, the description is relatively simple, and the relevant parts can be referred to the partial description of the previous embodiments.

[0060] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A hanging heat-insulating air duct, comprising: The air duct body comprises a pipe body and a flange; A thermal insulation layer, wherein the thermal insulation layer covers the tube body; A hoisting assembly, the hoisting assembly comprising a supporting member and a suspension rod; It is characterized in that The insulation layer further comprises at least one insulation layer support member, the insulation layer support member divides the insulation layer into a support insulation area and a non-support insulation area along the extension direction of the air duct, the insulation layer support member comprises at least a connection section and a support section which are bent or fixedly connected, the connection section is fixedly connected to the pipe body, and the support section provides a support surface for the insulation layer in the support insulation area; The insulation layer is divided into a double-layer structure of an inner sub-insulation layer and an outer sub-insulation layer by the insulation layer support member in the supporting insulation area, wherein the inner sub-insulation layer is arranged between the upper surface of the supporting section and the tube wall of the tube body, and the outer sub-insulation layer is arranged between the lower surface of the supporting section and the supporting member, and the bulk density of the inner sub-insulation layer is less than the bulk density of the outer sub-insulation layer.

2. A hanging type heat preservation air duct as claimed in claim 1, characterized in that: The thermal insulation layer is a single-layer structure in the non-support thermal insulation area.

3. A hanging type heat preservation air duct as claimed in claim 2, characterized in that: The total thickness of the thermal insulation layer in the support thermal insulation area is the same as the thickness in the non-support thermal insulation area.

4. The hanging heat-insulating air duct according to claim 1, characterized in that: The bulk density of the inner sub-insulation layer of the double-layer structure in the insulation layer is 48 kg / m 3 -100kg / m 3 The outer sub-insulation layer has a bulk density of 100 kg / m 3 - 200kg / m 3 Any value in between.

5. The hanging heat-insulating air duct according to claim 1, characterized in that: The thickness of the inner sub-insulation layer in the supporting insulation zone is greater than or equal to the thickness of the outer sub-insulation layer.

6. The hanging heat-insulating air duct according to claim 1, characterized in that: The connecting section and the tube body are fixedly connected by any one of welding, gluing, clamping, threaded connection, riveting, and integral molding; the supporting section and the connecting section are fixedly connected by any one of welding, gluing, clamping, threaded connection, riveting, and integral molding.

7. The hanging heat-insulating air duct according to claim 1, characterized in that: The insulation layer support member is a U-shaped bending member, an L-shaped bending member or a ⊥-shaped support member.

8. A hanging type heat-insulating air duct as claimed in any one of claims 1 to 7, characterized in that: The materials used for the insulation layer in the support insulation area and the non-support insulation area are the same or different insulation materials among rock wool, glass wool, silicate board, polystyrene foam and polyurethane foam.

9. The hanging heat-insulating air duct according to claim 8, characterized in that: The inner sub-insulation layer and the outer sub-insulation layer of the insulation layer in the support insulation zone are made of heterogeneous materials such as rock wool, glass wool, silicate board, polystyrene foam, and polyurethane foam.

10. A hanging type heat preservation air duct system, characterized in that: It comprises at least two groups of hanging insulated air ducts as described in any one of claims 1 to 9, and the hanging insulated air ducts are connected by flanges.

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