Low resistance combined flow tee air duct
Through a multi-stage flow guiding design with streamlined channels, buffer chambers, and flow guiding chambers, combined with composite materials, the problems of high resistance and high energy consumption in traditional three-way ventilation ducts have been solved, achieving low-resistance confluence and energy-saving effects.
Patent Information
- Application Number
- CN202522636519.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-11-03
- Estimated Expiration
- 2035-12-12
AI Technical Summary
Traditional three-way ventilation ducts suffer from high resistance and energy consumption due to direct airflow collisions, which also affects the smooth flow of air. Existing designs have failed to effectively solve the drag reduction problem.
The multi-stage flow guiding design, which incorporates streamlined grooves, buffer chambers, and flow guide chambers, combined with composite materials such as superoleophobic coating, anti-corrosion layer, and antistatic layer, optimizes the airflow confluence path, suppresses eddy current generation, and reduces frictional resistance.
It significantly reduces local resistance loss and noise at the confluence point, improves the durability and hygiene level of the duct, reduces system fan energy consumption and operating costs, and meets green building requirements.
Smart Images
Figure CN224932376U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fluid machinery, and in particular to a low-resistance confluence three-ventilation duct. Background Technology
[0002] Traditional three-way ventilation ducts are mostly simple T-shaped structures. When the two airflows merge, they collide directly and generate vortices, resulting in high resistance and energy consumption. They also affect the smooth flow of air. Over the past few decades, there have been no major structural improvements to these tees. The design focuses more on ease of construction and does not prioritize drag reduction. However, the resistance loss of the tees in the ventilation system can significantly increase the overall energy consumption. Therefore, it is necessary to develop low-resistance merging three-way ventilation ducts to solve the drag reduction and energy-saving pain points of traditional designs. Traditional right-angle or acute-angle T-type tees cause the branch airflow to directly impact the main flow at a large angle, usually 90°, resulting in a sudden change in airflow direction. This leads to a large-scale energy dissipation vortex zone downstream of the confluence zone and local resistance loss. To address these issues, a low-resistance confluence T-type duct is proposed. Utility Model Content
[0003] To overcome the above shortcomings, this utility model provides a low-resistance confluence three-ventilation duct, which aims to improve the problem of high resistance and easy formation of vortices in existing ventilation ducts.
[0004] To achieve the above objectives, the present invention adopts the following technical solution: a low-resistance confluence three-ventilation duct, including a main duct, the inner wall of which is provided with multiple streamline grooves, a branch air inlet assembly provided on one side of the main duct, the branch air inlet assembly including a buffer chamber, one end of which is fixedly connected to an air inlet, the inner wall of which is provided with multiple flow guide grooves, and the other end of which is fixedly connected to a flow guide chamber.
[0005] As a further description of the above technical solution: The main duct material layer includes a super oleophobic coating, an anti-corrosion layer is fixedly connected to the outer wall of the super oleophobic coating, an antistatic layer is fixedly connected to the outer wall of the anti-corrosion layer, and a diamond carbon layer is fixedly connected to the outer wall of the antistatic layer.
[0006] As a further description of the above technical solution: The streamlined groove has a recessed groove inside, and the main air duct has a honeycomb structure inside.
[0007] As a further description of the above technical solution: The flow guide chamber is located on the inner wall of the main air duct, and the buffer chamber is fixedly connected to the outer side of the main air duct.
[0008] As a further description of the above technical solution: The angle between the buffer chamber and the main air duct is forty-five degrees.
[0009] As a further description of the above technical solution: The anti-corrosion layer is located between the superoleophobic coating and the antistatic layer, and the superoleophobic coating is located on the inner wall of the anti-corrosion layer.
[0010] This utility model has the following beneficial effects: 1. In this utility model, through the multi-stage flow guiding and buffering design of streamlined flow guide chamber, buffer cavity and flow channel, the airflow of the branch pipe is changed from vertical impact to smooth fusion, which fundamentally suppresses the generation of large-scale eddies.
[0011] 2. In this utility model, the axial streamline grooves on the inner wall of the main air duct effectively suppress lateral flow, reduce wall friction resistance, significantly reduce system fan energy consumption, reduce operating costs, and meet the requirements of green building and energy conservation and environmental protection. Attached Figure Description
[0012] Figure 1 This is a three-dimensional schematic diagram of a low-resistance confluence three-ventilation duct proposed in this utility model; Figure 2 This is a schematic diagram of the groove structure of a low-resistance confluence three-ventilation duct proposed in this utility model; Figure 3 This is a schematic diagram of the air inlet of a low-resistance confluence three-ventilation duct proposed in this utility model; Figure 4 This is a schematic diagram of the flow guide chamber of a low-resistance confluence three-ventilation duct proposed in this utility model; Figure 5 This is a schematic diagram of the material layer of a low-resistance confluence three-ventilation duct proposed in this utility model.
[0013] Legend: 1. Main air duct; 2. Streamline groove; 3. Buffer chamber; 4. Air inlet; 5. Groove; 6. Flow guide chamber; 7. Flow channel; 8. Super oleophobic coating; 9. Anti-corrosion layer; 10. Antistatic layer; 11. Diamond carbon layer. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0015] Reference Figures 1-4The present invention provides an embodiment of a low-resistance confluence three-way ventilation duct, including a main duct 1, with multiple streamline grooves 2 opened on the inner wall of the main duct 1, and a branch air inlet assembly provided on one side of the main duct 1. The branch air inlet assembly includes a buffer chamber 3, with an air inlet 4 fixedly connected to one end of the buffer chamber 3, and multiple flow guide grooves 7 opened on the inner wall of the air inlet 4. A flow guide chamber 6 is fixedly connected to the other end of the buffer chamber 3.
[0016] The airflow channel 7 initially sorts the airflow at the air inlet 4, eliminating initial turbulence. The buffer chamber 3 slows down and stabilizes the airflow in the branch pipe through its enlarged cross-sectional area, converting dynamic pressure into static pressure to prepare for smooth merging. The guide chamber 6 extends into the main air duct 1, precisely introducing the buffered airflow into the main airflow in the same direction and speed as the mainstream, transforming violent vortex collisions into smooth airflow fusion, fundamentally reducing local resistance loss and noise at the merging point.
[0017] Reference Figure 1 and Figure 5 The material layer of the main air duct 1 includes a super oleophobic coating 8, an anti-corrosion layer 9 is fixedly connected to the outer wall of the super oleophobic coating 8, an antistatic layer 10 is fixedly connected to the outer wall of the anti-corrosion layer 9, and a diamond carbon layer 11 is fixedly connected to the outer wall of the antistatic layer 10.
[0018] The superoleophobic coating 8, as the innermost layer, makes it difficult for grease and moisture to adhere, forming a non-stick effect. The antistatic layer 10 dissipates charges and prevents dust from being attracted by static electricity. The diamond carbon layer 11, as the outermost layer, provides excellent physical protection with its extremely high hardness and smoothness. The combined effect of these composite layers ensures the long-term smoothness and cleanliness of the inner wall of the duct. Its direct benefit is the long-term maintenance of low frictional resistance, while eliminating performance degradation and microbial growth caused by dust accumulation and corrosion. This greatly improves the durability, hygiene level, and performance stability of the duct throughout its entire life cycle.
[0019] Reference Figures 1-3 The streamlined groove 2 has a groove 5 inside, and the main air duct 1 has a honeycomb pattern inside.
[0020] When tiny eddies are generated in the main airflow, these dense honeycomb-like pores can restrict, divide, and quickly dissipate their energy, just like breaking a large vortex into countless small vortices and quickly calming it down, thus playing a powerful role in rectifying and stabilizing the flow.
[0021] Reference Figure 3 and Figure 4 The flow guide chamber 6 is located on the inner wall of the main air duct 1, and the buffer chamber 3 is fixedly connected to the outside of the main air duct 1.
[0022] The layout constitutes an "internal and external coordinated" airflow guiding system. The buffer chamber 3 completes the airflow on the outside, while the airflow guiding chamber 6 goes deep into the core airflow area inside the main air duct 1 to perform the final precise delivery. This design realizes the separation of the "pre-processing" and "precise merging" of the airflow, so that the function of each part can be optimally performed. It not only optimizes the aerodynamic performance, but also makes the structure more compact and reasonable, and facilitates manufacturing and installation.
[0023] Reference Figures 1-3 The angle between the buffer chamber 3 and the main air duct 1 is 45 degrees.
[0024] It provides a flow direction change starting point that is gentler than a right angle and more space-saving than a smaller angle, so that the airflow begins to turn gently towards the main pipe when it enters the buffer chamber 3. This angle can effectively reduce the initial impact loss of the airflow at the inlet without significantly increasing the component volume, laying a good foundation for the subsequent buffering and guiding process, and achieving a good balance between space utilization and performance.
[0025] Reference Figures 1-3 The anti-corrosion layer 9 is located between the superoleophobic coating 8 and the antistatic layer 10, and the superoleophobic coating 8 is located on the inner wall of the anti-corrosion layer 9.
[0026] The superoleophobic coating 8 directly faces the airflow and performs the core surface function; the anti-corrosion layer 9 adheres closely to the substrate and provides basic chemical protection; the antistatic layer 10 is located in the middle, working together inside and out. This layered structure ensures that each functional coating can play its role in the most effective position, while the layers support each other, maximizing and extending the protective effect.
[0027] Working principle: When the airflow enters from the branch pipe, the guide groove 7 will have a preliminary "combing" effect on the airflow, making it more orderly and reducing turbulence at the inlet. The second stage is the buffer chamber 3. The buffer chamber 3 is a cavity with a sudden expansion of volume. According to the fluid continuity theorem, the velocity of the airflow will decrease instantly after entering the buffer chamber 3, and the dynamic pressure will be converted into static pressure. This will make the airflow initially stabilized and decelerated, preparing for the next stage of smooth merging. Its 45-degree angle design is also to provide a smoother starting point for the flow direction change than a right angle.
[0028] The diamond carbon layer 11, as the outermost layer, only serves to protect the outer wall of the duct. The antistatic layer 10 aims to reduce dust adsorption on the duct wall due to static electricity, keep the inner wall smooth, and indirectly maintain low resistance. The anti-corrosion layer 9 and the super oleophobic coating 8 are used to protect the duct substrate and prevent oil stains from adhering.
[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A low-resistance confluence three-way ventilation duct, comprising a main duct (1), characterized in that: The inner wall of the main air duct (1) is provided with multiple streamline grooves (2). A branch air inlet assembly is provided on one side of the main air duct (1). The branch air inlet assembly includes a buffer chamber (3). One end of the buffer chamber (3) is fixedly connected to an air inlet (4). The inner wall of the air inlet (4) is provided with multiple flow guide grooves (7). The other end of the buffer chamber (3) is fixedly connected to a flow guide chamber (6).
2. The low-resistance confluence three-ventilation duct according to claim 1, characterized in that: The material layer of the main air duct (1) includes a super oleophobic coating (8), an anti-corrosion layer (9) is fixedly connected to the outer wall of the super oleophobic coating (8), an antistatic layer (10) is fixedly connected to the outer wall of the anti-corrosion layer (9), and a diamond carbon layer (11) is fixedly connected to the outer wall of the antistatic layer (10).
3. The low-resistance confluence three-ventilation duct according to claim 1, characterized in that: The streamlined groove (2) has a groove (5) inside, and the main air duct (1) has a honeycomb structure inside.
4. A low-resistance confluence three-ventilation duct according to claim 3, characterized in that: The flow guide chamber (6) is located on the inner wall of the main air duct (1), and the buffer chamber (3) is fixedly connected to the outside of the main air duct (1).
5. A low-resistance confluence three-ventilation duct according to claim 3, characterized in that: The included angle between the buffer chamber (3) and the main air duct (1) is forty-five degrees.
6. A low-resistance confluence three-ventilation duct according to claim 2, characterized in that: The anti-corrosion layer (9) is located between the superoleophobic coating (8) and the antistatic layer (10), and the superoleophobic coating (8) is located on the inner wall of the anti-corrosion layer (9).