Ventilation cap

Abstract

The invention relates to the technical field of ventilation equipment, and particularly discloses a ventilation cap which comprises an air pipe, an inverted-cone-shaped flow guide umbrella and a rain shielding top cover. The bottom of the air pipe is provided with a clamp connector assembly with an annular protrusion and an axial contraction joint, and detachable sealing connection with pipelines with different pipe diameters is achieved. The top end of the air pipe is connected with a rain-shielding top cover through a filter screen, and the inner side of the rain-shielding top cover is connected with an inverted-cone-shaped diversion umbrella through a sealing cover. The flow guide umbrella is provided with a spiral flow guide piece and an air inlet, the flow guide umbrella and the annular flow guide air channel form a three-level steering labyrinth type airflow channel, airflow is discharged through the drainage and dust removal port after impurities are separated through rotation and centrifugation, and purified air enters an air pipe straight-through path through the filter screen to be output. Through the detachable structure, the installation and maintenance efficiency is improved, airflow organization is optimized, the efficient ventilation function is achieved, and the rainproof, dustproof and universal adaptability are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation equipment, in particular to a ventilation hood. Background Art

[0002] In the field of building ventilation systems, ventilation systems are key facilities for ensuring indoor air quality, regulating indoor temperature and humidity, and removing harmful gases. As an important part of the ventilation system, the performance of ventilation caps directly affects the efficiency and reliability of the entire ventilation system.

[0003] Traditional ventilation caps often utilize a single top cap structure (such as cement slabs or louvers), relying solely on gravity to guide rainwater down. In strong winds or diagonal rainfall, rainwater can easily flow back through the cap's edges into the duct, reducing ventilation system efficiency and even damaging the equipment. For example, the round, umbrella-shaped caps commonly used on rectangular exhaust ducts direct airflow downward, increasing the risk of rainwater retention.

[0004] Existing ventilation caps generally lack efficient filtration structures and rely solely on simple mesh screens to intercept large debris. Over long periods of operation, dust easily accumulates inside the ducts, and mesh screen clogging increases system resistance and shortens equipment life.

[0005] Therefore, a ventilation cap is proposed to solve the current shortcomings. Summary of the Invention

[0006] In order to solve the problems of the prior art, the present invention provides a ventilation hood.

[0007] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned technology and provide a ventilation hood.

[0008] In order to solve the above technical problems, the technical solution provided by the present invention is a ventilation cap: comprising an air duct, an inverted cone-shaped guide umbrella, and a rainproof top cover;

[0009] The top of the air duct is connected to a filter, and the top of the filter is connected to a rainproof top cover through a sealing cover. The inner side of the rainproof top cover is provided with an inverted cone-shaped guide umbrella connected to the upper part of the air duct, and the inverted cone-shaped guide umbrella is provided with a plurality of radially distributed spiral guide plates, and the inverted cone-shaped guide umbrella is provided with an air inlet that cooperates with the spiral guide plates. An annular guide air duct is provided between the inverted cone-shaped guide umbrella and the filter, and the annular guide air duct and the air inlet form a labyrinth-like airflow channel.

[0010] A clamp interface assembly connected to the pipeline is provided at the bottom of the air duct.

[0011] As an improvement, the radial cross-section of the annular guide air duct is a V-shaped bending structure, the top of its outer side surface is connected to the inner edge of the rainproof top cover, the top of its inner side surface is connected to the edge of the filter, and the bent bottom is connected to the inverted cone-shaped guide umbrella.

[0012] As an improvement, the height of the outer side surface of the annular guide air duct is greater than the height of its inner side surface, and an air guide port corresponding to the air inlet is provided at the bottom of the outer side surface of the annular guide air duct. The air guide port coincides with the lower area of ​​the air inlet and its upper edge is lower than the top of the inner side surface of the annular guide air duct.

[0013] As an improvement, it also includes drainage and dust removal ports, multiple drainage and dust removal ports are circumferentially arranged on the outside of the bottom of the inverted cone-shaped guide umbrella, and their opening directions are parallel to the axis of the air duct.

[0014] As an improvement, the clamp interface assembly is a clamp, a group of annular protrusions are provided at intervals on the lower part of the air duct, the clamp interface assembly is arranged between the annular protrusions, and the lower part of the air duct is provided with multiple shrinkage seams extending along its axial direction.

[0015] As an improvement, the filter screen and the cover, the air duct, and the cover and the rainproof top cover are all detachably connected by bolts.

[0016] As an improvement, a connecting ring is provided on the top of the air duct, and the inverted cone-shaped guide umbrella and the connecting ring are detachably connected by bolts.

[0017] As an improvement, a plurality of fixing strips cooperating with the rain shield top cover are provided on the circumference of the outer side of the inverted cone-shaped guide umbrella, and the fixing strips are detachably connected to the inverted cone-shaped guide umbrella and the rain shield top cover by bolts.

[0018] The advantages of the present invention compared with the prior art are:

[0019] 1. The clamp interface assembly cooperates with the annular protrusion on the lower portion of the duct to form a mechanical support and positioning structure. During installation, tightening and loosening can be completed by simply rotating the nut, significantly reducing the difficulty of installation and maintenance. Furthermore, the contraction seam on the lower portion of the duct divides it into flexible petals, endowing it with radial deformation capabilities, allowing it to adapt to pipes of different diameters. This solves the technical problems of existing vent cap interfaces with poor versatility and cumbersome installation, achieving the convenience of a detachable sealed connection and the flexibility of pipe adaptation.

[0020] 2. The rainproof top cover adopts a trapezoidal structure with an open bottom. The outward-expanding guide surface guides rainwater to flow down along the outer surface, and the opening diameter is larger than the filter to prevent rainwater from directly pouring in. The inverted cone-shaped guide umbrella, the rainproof top cover, and the air duct form a closed space, which cooperates with the filter to form a physical barrier to block mosquitoes, branches and other debris. The spiral guide vane and the annular guide air duct form a labyrinth-like airflow channel. Through the three-level airflow steering and centrifugal force, water droplets and dust are thrown to the outside of the bottom of the inverted cone-shaped guide umbrella and discharged through the drainage and dust removal port, which solves the problems of rainwater intrusion and debris blockage in the existing technology and improves the protective performance of the ventilation cap in complex environments.

[0021] 3. The bolts of various parts are detachable and connected through components such as the cover, connecting ring, and fixing strip, which makes installation and disassembly easy, and facilitates separation for cleaning or replacement, thus reducing long-term maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a ventilation cap of the present invention Figure 1 .

[0023] Figure 2 This is a schematic diagram of the structure of a ventilation cap of the present invention Figure 2 .

[0024] Figure 3 It is an exploded view of a ventilation hood of the present invention.

[0025] Figure 4 It is a front view of a ventilation hood of the present invention.

[0026] Figure 5 yes Figure 4 Cross-sectional view at AA in the middle.

[0027] Figure 6 yes Figure 5 A partial enlarged view of point B in the middle.

[0028] Figure 7 It is a structural schematic diagram of an inverted cone-shaped guide umbrella in a ventilating hood of the present invention.

[0029] Figure 8 This is a schematic diagram of the structure of another embodiment of a ventilating cap of the present invention. Figure 1 .

[0030] Figure 9 This is a schematic diagram of the structure of another embodiment of a ventilating cap of the present invention. Figure 2 .

[0031] Figure 10 It is a schematic diagram of the internal structure of another embodiment of a ventilating hood of the present invention.

[0032] As shown in the figure:

[0033] 1. Air duct; 2. Inverted cone-shaped guide umbrella; 3. Rain shield; 4. Filter; 5. Cover; 6. Spiral guide vane; 7. Air inlet; 8. Annular guide duct; 9. Clamp interface assembly; 10. Air guide port; 11. Drain and dust removal port; 12. Annular protrusion; 13. Contraction joint; 14. Connecting ring; 15. Fixing strip. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the invention more clear, the technical solutions in the embodiments of the invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the invention. Obviously, the described embodiments are only part of the embodiments of the invention, not all of the embodiments. Generally, the components of the embodiments of the invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0035] In the description of the embodiments of the invention, it should be noted that if the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc. appear, the orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the invention and simplify the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," "third," etc. are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, the use of terms such as "horizontal," "vertical," and "overhanging" does not necessarily imply that the component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0037] In the description of the embodiments of the invention, "a plurality" means at least two.

[0038] In the description of the embodiments of the invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the invention based on specific circumstances.

[0039] As shown in the accompanying drawings, a ventilation cap includes an air duct 1, an inverted cone-shaped guide umbrella 2, and a rainproof top cover 3;

[0040] The air duct 1 is a hollow cylindrical structure with openings at both ends, which forms a straight airflow path as an air inlet and outlet channel to realize the inlet and outlet transmission of air. A clamp interface assembly 9 connected to the pipeline is provided at the bottom of the air duct 1 to realize a detachable sealed connection with the external pipeline.

[0041] Specifically, the clamp interface assembly 9 is a clamp, and a group of annular protrusions 12 are spaced apart at the lower part of the air duct 1. The annular protrusions 12 are spaced apart along the axial direction of the air duct 1 to form a mechanical support structure, which provides support and positioning for the installation of the clamp interface assembly 9 and enhances the stability of the connection.

[0042] The clamp interface assembly 9 is arranged between the annular protrusions 12. Through the limiting effect of the annular protrusions 12 on the clamp interface assembly 9, the tightening and loosening operations of the clamp interface assembly 9 only require rotating the nut, which significantly reduces the difficulty of installation and maintenance.

[0043] During implementation, the annular protrusion 12 forms an annular step on the outer surface of the air duct, providing an axial positioning reference for the clamp interface assembly 9 to prevent axial slippage during installation.

[0044] The lower part of the air duct 1 is provided with a plurality of contraction seams 13 extending along its axial direction, which divides the air duct 1 into a plurality of flexible petal structures, so that the air duct 1 has radial deformation capability and can adapt to pipes of different diameters, thereby improving the versatility and flexibility of the air duct 1.

[0045] During specific implementation, the bottom end of the air duct 1 is sleeved on the external pipe, and the bottom of the air duct 1 is converted into an elastomeric structure through the shrinkage seam 13, which can meet the adaptation requirements of the air duct and pipes of different diameters. At the same time, through the tightening effect of the clamp interface assembly 9, the air duct 1 can be tightly connected to the external pipe to achieve a detachable sealed connection, which is not only convenient for installation, but also convenient for maintenance or replacement, greatly improving the convenience of use and maintenance efficiency of the air duct 1.

[0046] A filter screen 4 is connected to the top of the air duct 1 , and the filter screen 4 is detachably connected to the air duct 1 by bolts, which is convenient for disassembly for cleaning, thereby maintaining the cleanliness and ventilation performance of the filter screen 4 .

[0047] Specifically, the filter 4 has an overall cylindrical structure, which can ensure its ventilation area while the bottom end of the filter 4 is connected to the top end of the air duct 1 to form a physical barrier to prevent mosquitoes from flying in. At the same time, the filter 4 can filter the air entering the ventilation cap to a certain extent, intercepting larger debris carried in the air to prevent it from entering the ventilation system, ensuring the quality of the ventilation air, and reducing the wear of impurities on the internal components of the ventilation system.

[0048] The top of the filter 4 is connected to the rainproof top cover 3 through the sealing cover 5. The cross-section of the rainproof top cover 3 is a hollow trapezoidal structure with an open bottom, forming an outward-expanding guide surface, so that rainwater flows downward along the outer surface of the rainproof top cover 3. At the same time, the bottom opening diameter of the rainproof top cover 3 is larger than the diameter of the filter 4, which prevents rainwater from directly entering the air duct 1, ensuring the normal ventilation function of the ventilator cap in rainy environments, and providing a certain protection for its internal structure.

[0049] Specifically, the cover 5 is sleeved onto the top of the filter 4, and a connecting ring is provided on its top edge to connect to the rain shield 3. The cover 5 and the filter 4, as well as the connecting ring on the top of the cover 5 and the rain shield 3, are detachably connected by bolts, making installation and removal easy. The installation of the cover 5 ensures the sealing of the connection between the filter 4, the air duct 1, and the rain shield 3, preventing rainwater and unfiltered air from entering through the connection gaps, thereby improving the overall sealing performance of the vent cap.

[0050] An inverted cone-shaped guide umbrella 2 connected to the upper part of the air duct 1 is provided on the inner side of the rainproof top cover 3. The inverted cone-shaped guide umbrella 2 is mounted on the air duct 1 and its bottom is connected to the air duct 1, and its upper part is in contact with the inside of the rainproof top cover 3. A closed space is formed by the rainproof top cover 3, the inverted cone-shaped guide umbrella 2 and the air duct 1 to avoid direct contact between the filter 4 and the outside, and reduce direct contact and damage to the filter 4 by external objects (such as branches, debris, etc.); at the same time, it further blocks external elements such as rainwater and dust from entering the ventilation system, thereby enhancing the protective performance of the ventilation cap.

[0051] Specifically, a connecting ring 14 is provided on the top of the air duct 1 , and the inverted cone-shaped guide umbrella 2 is detachably connected to the connecting ring 14 by bolts.

[0052] At the same time, a plurality of fixing strips 15 cooperating with the rain shield top cover 3 are provided on the outer circumference of the inverted cone-shaped guide umbrella 2. The fixing strips 15 are L-shaped as a whole. The fixing strips 15 are detachably connected to the inverted cone-shaped guide umbrella 2 and the rain shield top cover 3 by bolts.

[0053] The inverted cone-shaped guide umbrella 2 is provided with a plurality of spiral guide vanes 6 distributed radially. The shape of the inverted cone-shaped guide umbrella 2 helps to guide the airflow, and the spiral guide vanes 6 are in a three-dimensional spiral twisted shape, which converts the airflow into tangential rotational motion, helps to improve the ventilation efficiency, and at the same time can make water droplets or particulate debris be thrown to the outside of the inverted cone-shaped guide umbrella 2 under the action of centrifugal force.

[0054] An air inlet 7 cooperating with the spiral guide piece 6 is provided on the inverted cone-shaped guide umbrella 2 to ensure that the air flow can effectively pass through the inverted cone-shaped guide umbrella 2 and enter the interior of the ventilating hood.

[0055] At the same time, the spiral guide plate 6 can block the air inlet 7 to prevent debris from entering the ventilation hood through the air inlet 7.

[0056] An annular guide air duct 8 is provided between the inverted cone-shaped guide umbrella 2 and the filter screen 4 , and the annular guide air duct 8 and the air inlet 7 form a labyrinth-type airflow channel.

[0057] The radial cross-section of the annular guide air duct 8 is a V-shaped bending structure, the top of its outer side surface is connected to the inner edge of the rainproof top cover 3, the top of its inner side surface is connected to the edge of the filter 4, and the bottom of its V-shaped bend is connected to the inverted cone-shaped guide umbrella 2, so that the annular guide air duct 8 can change the direction of the airflow and form a specific airflow circulation channel.

[0058] The outer side of the annular guide air duct 8 is arranged parallel to the outer side wall of the inverted cone-shaped guide umbrella 2. The height of the outer side of the annular guide air duct 8 is greater than the height of its inner side. An air guide port 10 corresponding to the air inlet 7 is provided at the bottom of the outer side of the annular guide air duct 8. The air guide port 10 coincides with the lower area of ​​the air inlet 7 and its upper edge is lower than the top of the inner side of the annular guide air duct 8. The V-shaped bending structure of the annular guide air duct 8 cooperates with the air inlet 7 to form a three-level airflow deflection, thereby forming a stepped continuous airflow path with an outer bottom and an inner height;

[0059] Specifically:

[0060] First, the airflow enters the vent cap from the air inlet 7 of the inverted cone-shaped guide umbrella 2 and flows downward along the outer wall of the inverted cone-shaped guide umbrella 2;

[0061] Then, the airflow passes through the air guide port 10 on the outer side of the inverted cone-shaped guide umbrella 2 and enters the annular guide air duct 8. The airflow velocity direction is reversed, causing the airflow to climb along the inner side of the annular guide air duct 8.

[0062] Finally, after the airflow reaches the top of the inner side of the annular guide air duct 8, the airflow velocity direction is horizontally turned and enters the air duct 1 through the filter 4.

[0063] At the same time, through the cooperation of the spiral guide plate 6 and the annular guide air duct 8, the air flow moves in the ventilation hood in a rotational motion, and when the air flow enters the space between the inverted cone-shaped guide umbrella 2 and the annular guide air duct 8 through the air inlet 7, under the centrifugal action of the air flow, the water droplets or dust in the air are thrown to the outside of the bottom of the inverted cone-shaped guide umbrella 2, thereby achieving the aggregation of dust or water droplets.

[0064] It also includes drainage and dust removal ports 11 , and multiple drainage and dust removal ports 11 are circumferentially arranged on the outside of the bottom of the inverted cone-shaped guide umbrella 2 , and their opening directions are parallel to the axis of the air duct 1 .

[0065] During implementation, the rotating airflow collects the rainwater or dust centrifugally thrown out along the outer side of the annular guide air duct 8 to the bottom of the inverted cone guide umbrella 2, and then discharges it through the drainage and dust removal port 11.

[0066] As another embodiment, when the vent hood is installed downward, the cover 5 is connected to the bottom of the inverted cone-shaped guide umbrella 2, the bottom end of the filter 4 is sleeved with the cover 5, the upper end of the air duct 1 is set downward and extends into the rainproof top cover 3 and is connected to the rainproof top cover 3 through the connecting ring 14 to realize the assembly of the vent hood.

[0067] When the present invention is specifically implemented:

[0068] 1) External airflow capture and rotation acceleration:

[0069] When air circulates, the external airflow enters the ventilation cap through the air inlet 7 on the inverted cone-shaped guide umbrella 2.

[0070] At this time, the airflow first contacts the radially distributed spiral guide vanes 6, which exert tangential force on the airflow, converting it into a high-speed rotating flow.

[0071] The water droplets / dust particles with higher density in the rotating airflow are thrown to the outside of the inverted cone-shaped guide umbrella 2 under the action of centrifugal force, thereby achieving preliminary filtration and purification of the air.

[0072] 2) Labyrinth airflow purification and steering:

[0073] The airflow enters the sealed space formed by the annular guide duct 8 and the inverted cone guide umbrella 2, completing three-level diversion:

[0074] First, the airflow enters the vent cap from the air inlet 7 of the inverted cone-shaped guide umbrella 2 and flows downward along the outer wall of the inverted cone-shaped guide umbrella 2;

[0075] Then, the airflow passes through the air guide port 10 on the outer side of the inverted cone-shaped guide umbrella 2 and enters the annular guide air duct 8. The airflow velocity direction is reversed, causing the airflow to climb along the inner side of the annular guide air duct 8.

[0076] Finally, after the airflow reaches the top of the inner side of the annular guide air duct 8, the airflow velocity direction is horizontally turned and enters the air duct 1 through the filter 4.

[0077] At the same time, through the cooperation of the spiral guide plate 6 and the annular guide duct 8, the air flow moves in the ventilation hood in a rotating motion, forcing the centrifugally ejected debris to slide along the outer wall to the bottom of the inverted cone-shaped guide umbrella 2, and then be discharged through the drainage and dust removal port 11, avoiding the accumulation of debris affecting ventilation.

[0078] 3) Clean air flow output:

[0079] The filtered air is transmitted downward through the straight-through airflow path formed inside the air duct 1 and connected to the external pipe through the clamp interface component 9 at the bottom to achieve air exchange in the ventilation system. At this time, the filter 4 further filters the air entering the air duct 1.

[0080] The present invention and its embodiments are described above. This description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if a person skilled in the art is inspired by this and, without departing from the purpose of the present invention, designs structures and embodiments similar to this technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. A ventilation cap, characterized in that: It comprises an air duct (1), an inverted cone-shaped guide umbrella (2), and a rainproof top cover (3); The top of the air duct (1) is connected to a filter screen (4), and the top of the filter screen (4) is connected to a rainproof top cover (3) through a cover (5). An inverted cone-shaped guide umbrella (2) connected to the upper part of the air duct (1) is provided on the inner side of the rainproof top cover (3). The inverted cone-shaped guide umbrella (2) is provided with a plurality of spiral guide blades (6) distributed in a radial pattern. The inverted cone-shaped guide umbrella (2) is provided with an air inlet (7) matched with the spiral guide blades (6). An annular guide air duct (8) is provided between the inverted cone-shaped guide umbrella (2) and the filter screen (4). The annular guide air duct (8) and the air inlet (7) form a labyrinth-type airflow channel. A clamp interface assembly (9) connected to the pipeline is provided at the bottom of the air duct (1).

2. A vent cap according to claim 1, characterized in that: The annular guide air duct (8) has a V-shaped bending structure in radial cross-section, the top of its outer side surface is connected to the inner edge of the rainproof top cover (3), the top of its inner side surface is connected to the edge of the filter screen (4), and the bottom of its bending is connected to the inverted cone-shaped guide umbrella (2).

3. A ventilating cap according to claim 2, characterized in that: The height of the outer side surface of the annular guide air duct (8) is greater than the height of the inner side surface thereof; an air guide port (10) corresponding to the air inlet (7) is provided at the bottom of the outer side surface of the annular guide air duct (8); the air guide port (10) coincides with the lower region of the air inlet (7) and the upper edge thereof is lower than the top end of the inner side surface of the annular guide air duct (8).

4. The ventilating cap according to claim 1, characterized in that: It also includes drainage and dust removal ports (11), a plurality of drainage and dust removal ports (11) are circumferentially arranged on the outside of the bottom of the inverted cone-shaped guide umbrella (2), and the opening direction thereof is parallel to the axis of the air duct (1).

5. The ventilating cap according to claim 1, characterized in that: The clamp interface assembly (9) is a clamp, a group of annular protrusions (12) are provided at intervals on the lower portion of the air duct (1), the clamp interface assembly (9) is arranged between the annular protrusions (12), and a plurality of contraction seams (13) extending along the axial direction of the lower portion of the air duct (1) are provided.

6. The ventilating cap according to claim 1, characterized in that: The filter (4) and the cover (5), the air duct (1), and the cover (5) and the rainproof top cover (3) are all detachably connected via bolts.

7. The ventilating cap according to claim 1, characterized in that: A connecting ring (14) is provided on the top of the air duct (1), and the inverted cone-shaped guide umbrella (2) and the connecting ring (14) are detachably connected via bolts.

8. The ventilating cap according to claim 7, characterized in that: A plurality of fixing strips (15) cooperating with the rain shield top cover (3) are provided on the outer circumference of the inverted cone-shaped guide umbrella (2); the fixing strips (15) are detachably connected to the inverted cone-shaped guide umbrella (2) and the rain shield top cover (3) via bolts.

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