Air duct capable of indicating air flow direction

Abstract

The utility model relates to a ventilation duct technical field, concretely relates to a kind of air pipe that can indicate airflow direction, comprising: air pipe main body, the hollow is arranged in air pipe main body lateral wall, the first pivot support and the second pivot support are oppositely arranged in the hollow, pivot support and the second pivot support between the first pivot support are provided with pivot, pivot is sleeved with shaft sleeve, bearing is equipped between shaft sleeve and pivot, shaft sleeve can be flexibly rotated around pivot;Shaft sleeve is provided with inner rotating blade and outer rotating blade, the mark for indicating airflow direction is arranged on the both sides of outer rotating blade, the natural drive of airflow to inner rotating blade in the air pipe inside is driven, the mark on outer rotating blade is indicated to airflow direction, can directly show air pipe airflow direction, and have the advantages that structure is simple, and reliability is high.

Description

Technical Field

[0001] This utility model relates to the field of ventilation duct technology, specifically to a duct that can indicate the direction of airflow. Background Technology

[0002] In the field of ventilation and air conditioning technology, air ducts, as a core component of air transport, are widely used in air conditioning systems for various building environments. The main function of traditional air duct systems is to distribute heated or cooled air, processed by air conditioning equipment, to different areas of the building to achieve temperature control and air circulation. At the same time, they improve indoor air quality through functions such as filtration and purification, humidity regulation, and fresh air supply, and have become an indispensable part of modern building HVAC systems.

[0003] Existing duct systems exhibit diverse structural characteristics: depending on installation space and usage requirements, they can employ circular, rectangular, or square cross-section designs; in terms of materials, they primarily use metal materials such as galvanized steel sheets and plastics such as polyvinyl chloride (PVC). While these materials possess good sealing and structural strength, their opaque nature makes it impossible to visually monitor the internal condition of the duct. In conventional applications, this design can meet basic air distribution needs, but its limitations are becoming increasingly apparent in specific fields such as cleanroom ventilation systems in medical buildings and biological laboratories.

[0004] Especially in complex HVAC systems requiring dynamic switching of airflow direction, traditional ducts have significant technical limitations. For example, some medical facilities require the same duct to switch between supply and exhaust functions under different operating conditions, but current technology can only control airflow direction through external valves or manual adjustments. Due to the non-transparent nature of the duct itself, maintenance personnel cannot observe the internal airflow status in real time, leading to long system commissioning cycles, difficulty in fault location, and safety hazards such as airflow short circuits and contaminant retention. Although some systems attempt to integrate pressure sensors or airflow detection devices for indirect monitoring, these methods suffer from high costs, insufficient accuracy, and lack of visualization, making it difficult to meet the needs of precise control.

[0005] Therefore, how to break through the structural limitations of traditional air ducts and achieve visualized monitoring of internal airflow status while maintaining air distribution performance has become a key technical bottleneck for improving the intelligence level and operation and maintenance efficiency of HVAC systems. Utility Model Content

[0006] To overcome the shortcomings of the prior art, this application provides a duct that can indicate the airflow direction, which is designed to intuitively display the airflow direction of the duct and has the advantages of simple structure and high reliability.

[0007] The technical means adopted by this utility model to solve its technical problem is: a duct that can indicate the airflow direction, the improvement of which is that it includes: a duct body, the side wall of the duct body is provided with a hollow, a first rotating shaft support and a second rotating shaft support are arranged opposite each other in the hollow, a rotating shaft is arranged between the first rotating shaft support and the second rotating shaft support, a bushing is sleeved inside the rotating shaft, a bearing is provided between the bushing and the rotating shaft, and the bushing can rotate flexibly around the rotating shaft; an inner rotating blade and an outer rotating blade are provided on the bushing, and the outer rotating blade is provided with markings on both sides for indicating the airflow direction.

[0008] The rotation angle of the inner rotating blade and the outer rotating blade in the above technical solution is 0-180°.

[0009] In the above technical solution, the markings on both sides of the outer rotating blade have the same direction, both pointing towards the bushing.

[0010] The above technical solution also includes a locking device on the outside of the main side wall of the duct body for locking the inner and outer rotating blades. The locking device is symmetrically arranged on both sides of the first rotating shaft support.

[0011] The inner and outer rotating blades described in the above technical solution are equipped with sealing gaskets, which can be used with locking components to lock the inner and outer rotating blades in a non-indicating state.

[0012] The locking component described in the above technical solution includes a fixed base, a knob, and a locking tongue, wherein,

[0013] The fixed base is hollow inside, the latch can be extended and retracted by a knob, and the outer rotating blade is provided with a lock hole corresponding to the latch.

[0014] In the above technical solution, a retractable protective cover is provided at the hollowed-out part of the side wall of the duct body, and the surface of the protective cover is provided with ventilation holes.

[0015] In the above technical solution, the width of the hollowed-out side wall of the duct body is 1.1-1.3 times the width of the bushing, and the width of the duct body is 1.2-1.5 times the width of the inner rotating blade.

[0016] The beneficial effects of this utility model are:

[0017] The airflow inside the duct drives the inner rotating blades naturally, and the markings on the outer rotating blades indicate the direction of the airflow. This method can intuitively display the airflow direction in the duct and has the advantages of simple structure and high reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a duct that can indicate the direction of airflow, as shown in an embodiment of the present invention.

[0019] Figure 2 This is a front view of a duct that can indicate the direction of airflow, as shown in an embodiment of the present invention. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0022] like Figure 1-2 As shown, this application provides a duct that can indicate the direction of airflow, comprising:

[0023] The duct body 1 has a perforation 11 on its side wall. A first rotating shaft support 2 and a second rotating shaft support 3 are arranged opposite each other on the perforation 11. A rotating shaft 4 is arranged between the first rotating shaft support 2 and the second rotating shaft support 3. A bushing 5 is fitted inside the rotating shaft 4. A bearing 6 is provided between the bushing 5 and the rotating shaft 4. The bushing 5 can rotate flexibly around the rotating shaft 4. An inner rotating blade 7 and an outer rotating blade 8 are provided on the bushing 5. Markers 9 for indicating the airflow direction are provided on both sides of the outer rotating blade 8.

[0024] In one possible implementation, the rotation angle of the inner rotating blade 7 and the outer rotating blade 8 is 0-180°.

[0025] That is, when the angle of the inner rotating blade 7 is 0°, the angle of the outer rotating blade 8 is 180°. The inner rotating blade 7 is always located inside the duct body 1 and changes its rotation angle with the direction of airflow.

[0026] In one possible implementation, the markings 9 on both sides of the outer rotating blade 8 are in the same direction, both pointing towards the bushing 5.

[0027] When the airflow direction inside the duct body 1 is from the outside to the inside, and the rotation angle of the inner rotating blade 7 is 180° in the extreme state, then the rotation angle of the outer rotating blade is 0°, and the wind direction is indicated by the mark 9 on the right side of the outer rotating blade 8; when the airflow direction inside the duct body 1 is from the inside to the outside, and the rotation angle of the inner rotating blade 7 is 0° in the extreme state, then the rotation angle of the outer rotating blade 8 is 180°, and the wind direction is indicated by the mark 9 on the left side of the outer rotating blade 8.

[0028] In one possible implementation, a locking member 10 for locking the inner and outer rotating blades is also provided on the outside of the side wall of the duct body 1, and the locking member 10 is symmetrically arranged on both sides of the first rotating shaft support 2.

[0029] In one exemplary embodiment, the locking member 10 includes a fixed base, a knob, and a locking tongue, wherein,

[0030] The fixed base is hollow inside, the latch can be extended and retracted by a knob, and the outer rotating blade 8 is provided with a lock hole corresponding to the latch.

[0031] When the user needs to lock the inner and outer rotating blades, the inner and outer rotating blades can be manually rotated to the side wall of the parallel air duct body 1, and then the locking tongue can be released by rotating the knob. At this time, the locking tongue will extend into the corresponding locking hole in the outer rotating blade 8, thereby locking the inner and outer rotating blades.

[0032] In one possible implementation, the inner and outer rotating blades are provided with sealing gaskets 12, which can be used with locking members 10 to lock the inner and outer rotating blades in a non-indicating state.

[0033] Optionally, the sealing gasket is made of a highly elastic material (such as silicone), which generates a pre-tightening force under the pressure of the locking element, increases the static friction between the blade and the locking element, and effectively prevents accidental unlocking caused by strong airflow impact or vibration; at the same time, the flexibility of the sealing gasket can compensate for processing errors or deformation, ensure that the locking pressure is evenly distributed, and avoid mechanical failure caused by local stress concentration.

[0034] In one possible implementation, a retractable protective cover is provided at the cutout 11 on the side wall of the duct body 1, and the surface of the protective cover is provided with ventilation holes.

[0035] Optionally, the protective cover is made of double-layer stainless steel corrugated pipe with a compression stroke of 50mm to prevent foreign objects from entering; the ventilation hole has a diameter of 2mm and an opening rate of 30% to balance protection and ventilation needs.

[0036] In one possible implementation, the width of the cutout 11 on the side wall of the duct body is 1.1-1.3 times the width of the bushing 5, and the width of the duct body 1 is 1.2-1.5 times the width of the inner rotating blade 7.

[0037] The width of the cutout is 1.1-1.3 times that of the bushing, which ensures that the bushing and blades maintain a gap of 1-3mm with the cutout edge when rotating. This avoids friction between the blades and the inner wall of the duct and limits excessive airflow diffusion. The width of the duct is 1.2-1.5 times that of the blade, which can form an annular channel of 20%-50% of the blade width between the blade and the side wall of the duct. This guides the airflow to concentrate on the effective area of ​​the blade and reduces the generation of eddies.

[0038] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A duct capable of indicating airflow direction, characterized in that, include: The duct body has a perforated side wall. A first rotating shaft support and a second rotating shaft support are arranged opposite each other above and below the perforation. A rotating shaft is arranged between the first rotating shaft support and the second rotating shaft support. A bushing is fitted inside the rotating shaft. A bearing is provided between the bushing and the rotating shaft. The bushing can rotate flexibly around the rotating shaft. An inner rotating blade and an outer rotating blade are provided on the bushing. Markers for indicating the airflow direction are provided on both sides of the outer rotating blade.

2. A duct for indicating airflow direction according to claim 1, characterized in that, The rotation angle of the inner and outer rotating blades is 0-180°.

3. A duct for indicating airflow direction according to claim 1, characterized in that, The markings on both sides of the outer rotating blade are in the same direction, both pointing towards the bushing.

4. A duct for indicating airflow direction according to claim 1, characterized in that, The main body of the air duct is also provided with locking components for locking the inner and outer rotating blades. The locking components are symmetrically arranged on both sides of the first rotating shaft support.

5. A duct capable of indicating airflow direction according to claim 4, characterized in that, The inner and outer rotating blades are equipped with sealing gaskets, which can be used with locking components to lock the inner and outer rotating blades when not in an indicated state.

6. A duct capable of indicating airflow direction according to claim 4, characterized in that, The locking component includes a fixed base, a knob, and a locking tongue. The fixed base is hollow inside, the latch can be extended and retracted by a knob, and the outer rotating blade is provided with a lock hole corresponding to the latch.

7. A duct for indicating airflow direction according to claim 1, characterized in that, The duct body has a retractable protective cover at the hollowed-out side wall, and the surface of the protective cover has ventilation holes.

8. A duct capable of indicating airflow direction according to claim 1, characterized in that, The width of the cutout on the side wall of the duct body is 1.1-1.3 times the width of the bushing, and the width of the duct body is 1.2-1.5 times the width of the inner rotating blade.

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