Flexible air pipe
By designing multiple flow guide systems at the corners of the flexible air duct, including the main channel and the splitter, the problem of unstable flow at the corners of the flexible air duct is solved, and more efficient fluid guidance and air volume control are achieved.
Patent Information
- Application Number
- CN202421127464.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-22
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-05-22
AI Technical Summary
Flexible air ducts can easily lead to fluid flow separation and vortex at the turn, resulting in energy loss and unstable flow.
A flexible air duct is designed, which has multiple diversion systems at the turn, including the main channel and the diversion channel. The main channel is similar to the Tesla valve structure, the diversion channel is staggered, and the air inlet and outlet are designed as a trumpet-like structure. And a lightweight filler body is installed outside the diversion system.
Through the design of the main channel and the split channel, the fluid guidance efficiency is improved, the flow instability and vortex are reduced, the precise partition control of air volume and the regulation of air flow velocity are achieved, and the conveying efficiency of the air duct system is improved.
Smart Images
Figure CN222513792U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of air ducts, in particular to a flexible air duct. Background Art
[0002] Some HVAC projects use flexible ducts, which are made of special fiber materials. They are mainly used in air supply and exhaust systems. They have high installation flexibility, good noise absorption performance and light weight. Flexible ducts are usually made of the same material as a whole, with a large cross-sectional diameter. At the bends of large-diameter pipes, the fluid will flow separation and form vortices, which can easily lead to energy loss and flow instability. Therefore, how to increase the fluid stability at the bends of flexible ducts is an urgent problem to be solved. Summary of the invention
[0003] In view of the above-mentioned prior art, the utility model proposes a flexible air duct.
[0004] The utility model provides a flexible air duct, comprising a pipe, wherein a plurality of flow guide systems are arranged at the turning point of the pipe; the flow guide system comprises a plurality of main channels arranged along the pipe diameter direction, the main channel comprises a transverse air inlet, the other end of the air inlet is provided with a transverse first straight channel, the other end of the first straight channel is provided with a transverse first wavy channel, the other end of the first wavy channel is provided with a transverse second straight channel, the other end of the second straight channel is provided with an arc-shaped channel or a straight channel, the other end of the arc-shaped channel is provided with a longitudinal third straight channel, the other end of the third straight channel is provided with a longitudinal second wavy channel, the other end of the second wavy channel is provided with a longitudinal fourth straight channel, the other end of the fourth straight channel is provided with a longitudinal first air outlet; the other end of the straight channel is provided with a transverse second air outlet.
[0005] Preferably, the first wavy flow channel and the second wavy flow channel each include a plurality of V-shaped flow channel units connected in sequence.
[0006] Preferably, U-shaped branch flow channels are provided on both upper and lower sides of the V-shaped flow channel unit, and the U-shaped branch flow channels are connected to each other.
[0007] Preferably, the air inlet is configured as a trumpet-shaped structure, and the starting point of the air inlet is wide and the end point is narrow.
[0008] Preferably, the first and second air outlets are configured as trumpet-shaped structures, and the first and second air outlets have narrow starting points and wide ending points.
[0009] Preferably, a lightweight filling entity is provided at the turning point of the pipeline located outside the diversion system.
[0010] Preferably, the plurality of flow guiding systems are arranged in layers at a certain interval.
[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a flexible air duct, 1) by setting the main channel and the branch channel, the fluid guiding efficiency can be improved, and the flow instability and eddy current can be reduced. 2) by adjusting the number of air outlets in different directions, the precise zoning control of the air volume can be achieved. 3) by adjusting the pipe diameter of the air outlet, the air flow velocity at the air outlet can be controlled to meet the requirements of different air supply distances. 4) the trumpet-shaped design of the air inlet can gather the airflow, increase the air pressure, and improve the conveying efficiency of the air duct system. 5) the Tesla valve structure is adopted to guide the airflow to pass in one direction to prevent backflow. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 Schematic diagram of the internal structure of the flexible air duct in the embodiment of the utility model.
[0013] Figure 2 It is a schematic cross-sectional view of the pipe opening of the flexible air duct in the embodiment of the utility model.
[0014] In the figure: 1. Pipe; 2. Air inlet; 3. First straight flow channel; 4. First wavy flow channel; 5. Second straight flow channel; 6. Arc channel; 7. Straight channel; 8. Third straight flow channel; 9. Second wavy flow channel; 10. Fourth straight flow channel; 11. First air outlet; 12. Second air outlet; 13. Lightweight filling entity; 14. U-shaped diversion channel. DETAILED DESCRIPTION
[0015] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below with reference to specific illustrations.
[0016] Example: Figure 1 , 2A flexible air duct is shown, comprising a pipe 1, wherein a plurality of flow guide systems are arranged at a bend of the pipe 1, wherein the plurality of flow guide systems are arranged in layers at a certain interval; wherein the flow guide system comprises a plurality of main flow channels regularly arranged along the pipe diameter direction, wherein the main flow channel comprises a transverse air inlet 2, wherein a transverse first straight flow channel 3 is arranged at the other end of the air inlet 2, wherein a transverse first wavy flow channel 4 is arranged at the other end of the first straight flow channel 3, wherein a transverse second straight flow channel 5 is arranged at the other end of the first wavy flow channel 4, wherein a transverse second straight flow channel 5 is arranged at the other end of the second straight flow channel 5. The other end is provided with an arc channel 6 or a straight channel 7. The arc channel 6 is used for the turning direction of the pipeline, and the straight channel 7 is used for the straight direction of the pipeline. The other end of the arc channel 6 is provided with a longitudinal third straight flow channel 8, and the other end of the third straight flow channel 8 is provided with a longitudinal second wavy flow channel 9, and the other end of the second wavy flow channel 9 is provided with a longitudinal fourth straight flow channel 10, and the other end of the fourth straight flow channel 10 is provided with a longitudinal first air outlet 11; the other end of the straight channel 7 is provided with a transverse second air outlet 12. The turning part of the pipeline 1 is located outside the diversion system and is filled with a lightweight filling entity 13.
[0017] Furthermore, the first wavy flow channel 4 and the second wavy flow channel 9 each include a plurality of V-shaped flow channel units that are connected in sequence, and U-shaped branch flow channels 14 are provided on both upper and lower sides of the V-shaped flow channel units, and the U-shaped branch flow channels 14 are connected to each other.
[0018] Furthermore, the air inlet 2 is configured as a trumpet-shaped structure, and the starting point of the air inlet is wide and the end point is narrow, which can converge the airflow to increase the air pressure and guide the air into the main channel and the branch channel.
[0019] Furthermore, the first and second air outlets are configured as trumpet-shaped structures, and the first and second air outlets have narrow starting points and wide ending points, so that the air pressure of the airflow passing through the main flow channel is reduced, thereby reducing the flow rate.
[0020] The air duct of this embodiment divides the large-diameter pipe into several small-diameter pipes, which can guide the fluid to flow along a more stable path, thereby reducing the occurrence of separation and vortex. The structure of the main channel is similar to that of the Tesla valve, which can make the fluid flow in one direction. The branch channels are staggered on both sides of the main channel. A small part of the airflow entering from the air inlet or passing through the previous main channel will enter the branch channel and finally merge into the main channel.
[0021] In this embodiment, at the flexible air duct diversion point, because the number of air inlets 2 is equal to the sum of the number of air outlets in different directions (the first air outlet 11 and the second air outlet 12), the air volume in different directions can be adjusted by adjusting the number of air outlets in different directions to achieve the effect of controlling the air volume in different zones. In addition, the several air inlets 2 are evenly distributed on the pipe cross section, so the air volume passing through each main channel is the same, and the air flow velocity at the air outlet can be adjusted by adjusting the pipe diameter of the air outlet. For example, reducing the pipe diameter of the air outlet can increase the air flow velocity at the air outlet to achieve a longer air supply distance.
[0022] The above are only implementation methods of the present utility model, and are not intended to limit the patent scope of the present utility model. Any equivalent structure made using the contents of the specification and drawings of the present utility model, directly or indirectly used in other related technical fields, are also within the patent protection scope of the present utility model.
Claims
1. A flexible air duct, characterized in that: It comprises a pipeline, wherein several flow guiding systems are arranged at the turning part of the pipeline; the flow guiding system comprises several main flow channels arranged along the pipe diameter direction, the main flow channel comprises a transverse air inlet, the other end of the air inlet is provided with a transverse first straight flow channel, the other end of the first straight flow channel is provided with a transverse first wavy flow channel, the other end of the first wavy flow channel is provided with a transverse second straight flow channel, the other end of the second straight flow channel is provided with an arc channel or a straight channel, the other end of the arc channel is provided with a longitudinal third straight flow channel, the other end of the third straight flow channel is provided with a longitudinal second wavy flow channel, the other end of the second wavy flow channel is provided with a longitudinal fourth straight flow channel, the other end of the fourth straight flow channel is provided with a longitudinal first air outlet; the other end of the straight channel is provided with a transverse second air outlet.
2. The flexible air duct according to claim 1, characterized in that: The first wavy flow channel and the second wavy flow channel both include a plurality of V-shaped flow channel units that are connected in sequence.
3. The flexible air duct according to claim 2, characterized in that: U-shaped flow channels are arranged on both upper and lower sides of the V-shaped flow channel unit, and the U-shaped flow channels are connected to each other.
4. The flexible air duct according to any one of claims 1 to 3, characterized in that: The air inlet is configured as a trumpet-shaped structure, and the starting point of the air inlet is wide and the end point is narrow.
5. The flexible air duct according to any one of claims 1 to 3, characterized in that: The first and second air outlets are configured as trumpet-shaped structures, and the first and second air outlets have narrow starting points and wide ending points.
6. The flexible air duct according to any one of claims 1 to 3, characterized in that: A light filling entity is arranged at the turning point of the pipeline outside the flow guide system.
7. The flexible air duct according to any one of claims 1 to 3, characterized in that: The plurality of flow guiding systems are arranged in layers at a certain interval.