A ventilated cap

Abstract

The utility model relates to a ventilation equipment technical field, specifically disclose a ventilation cap, including air pipe, inverted conical deflector and rainproof top cover. Air pipe bottom sets up the clamp interface assembly and axial shrinkage joint of annular protruding, realizes the detachable sealed connection with different pipe diameter pipeline, air pipe top end is connected rainproof top cover through filter screen, and rainproof top cover inboard is connected inverted conical deflector through the closure. Deflector is equipped with helical deflector and air intake, and forms the labyrinth air passage of three -stage diversion with annular deflector air duct, and air current is discharged by drainage dust outlet after rotating centrifugal separation impurity, and the purified air enters the air pipe straight -through path output through filter screen. The utility model discloses through the detachable structure to promote installation maintenance efficiency, optimizes the air flow organization and realizes efficient ventilation function, and has the rain -proof, dust -proof and general adaptability.

Description

Technical Field

[0001] This utility model relates to the field of ventilation equipment technology, specifically a ventilation cap. Background Technology

[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 component 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 use a single cap structure (such as concrete slab type or louver type), relying solely on gravity to guide rainwater down. When encountering strong winds or oblique rainfall, rainwater can easily backflow into the duct through the edge of the cap, leading to decreased ventilation system efficiency or even equipment damage. For example, the round, umbrella-shaped caps commonly used in rectangular exhaust ducts direct airflow downwards, increasing the risk of rainwater retention.

[0004] Existing ventilation caps generally lack high-efficiency filtration structures, relying solely on simple mesh covers to intercept large debris. After long-term operation, dust easily accumulates inside the duct, and the clogging of the mesh covers increases system resistance and affects equipment lifespan.

[0005] Therefore, a ventilation cap is proposed to address the current shortcomings. Utility Model Content

[0006] To address the problems of the prior art, this utility model provides a ventilation cap.

[0007] The technical problem to be solved by this utility model is to overcome the defects of the above-mentioned technology and provide a ventilation cap.

[0008] To solve the above-mentioned technical problems, the technical solution provided by this utility model is a ventilation cap: including an air duct, an inverted cone-shaped air guide umbrella, and a rainproof top cover;

[0009] A filter screen is connected to the top of the duct, and a rain cover is connected to the top of the filter screen via a cap. An inverted cone-shaped air guide umbrella connected to the upper part of the duct is provided inside the rain cover. The inverted cone-shaped air guide umbrella is provided with multiple radially distributed spiral air guide vanes. An air inlet that cooperates with the spiral air guide vanes is provided on the inverted cone-shaped air guide umbrella. An annular air guide channel is provided between the inverted cone-shaped air guide umbrella and the filter screen. The annular air guide channel and the air inlet form a labyrinth-like airflow channel.

[0010] The bottom of the duct is equipped with a clamp interface assembly that connects to the pipe.

[0011] As an improvement, the radial cross-section of the annular airflow guide duct has a V-shaped bend structure, with its outer side top end connected to the inner edge of the rainproof top cover, its inner side top end connected to the edge of the filter screen, and its bend bottom connected to the inverted cone-shaped airflow guide umbrella.

[0012] As an improvement, the height of the outer side of the annular air guide duct is greater than the height of its inner side. The bottom of the outer side of the annular air guide duct is provided with an air guide port corresponding to the air inlet. 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 of the annular air guide duct.

[0013] As an improvement, it also includes drainage and dust removal ports, a plurality of which are circumferentially arranged on the outer side of the bottom of the inverted conical guide umbrella, and their opening direction is parallel to the axis of the air duct.

[0014] As an improvement, the clamp interface assembly is a clamp, the lower part of the air duct is provided with a set of annular protrusions at intervals, the clamp interface assembly is disposed between the annular protrusions, and the lower part of the air duct is provided with multiple contraction joints extending along its axial direction.

[0015] As an improvement, the filter screen is detachably connected to the cover, the air duct, and the rain cover via bolts.

[0016] As an improvement, a connecting ring is provided at the top of the air duct, and the inverted conical air guide umbrella is detachably connected to the connecting ring by bolts.

[0017] As an improvement, the outer circumference of the inverted cone-shaped deflector umbrella is provided with multiple fixing strips that cooperate with the rain cover. The fixing strips are detachably connected to the inverted cone-shaped deflector umbrella and the rain cover by bolts.

[0018] The advantages of this utility model compared with the prior art are as follows:

[0019] 1. The clamp interface assembly engages with the annular protrusion at the bottom of the duct to form a mechanical support and positioning structure. Tightening and loosening can be completed simply by rotating the nut during installation, significantly reducing installation and maintenance difficulty. Simultaneously, the contraction joint at the bottom of the duct divides it into flexible petal structures, providing radial deformation capability and adapting to pipes of different diameters. This solves the technical problems of poor universality and cumbersome installation of existing ventilation cap interfaces, achieving convenient detachable sealing connections and flexible pipe adaptation.

[0020] 2. The rain cover adopts a trapezoidal structure with an open bottom. The outward-expanding airflow guides rainwater to flow down the outer surface, and the opening diameter is larger than the filter screen to prevent rainwater from directly entering. The inverted cone-shaped airflow guide umbrella, together with the rain cover and air duct, forms a closed space, which, together with the filter screen, constitutes a physical barrier to block mosquitoes, branches and other debris. The spiral airflow guide plate and the annular airflow guide duct form a labyrinthine airflow channel. Through three-stage airflow deflection and centrifugal force, water droplets and dust are thrown to the outside of the bottom of the inverted cone-shaped airflow guide umbrella and discharged through the drainage and dust removal port. This 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 bolted connections of each component are made detachable through components such as caps, connecting rings, and fixing strips, making installation and disassembly convenient, facilitating separate cleaning or replacement, and reducing long-term maintenance costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a ventilation cap according to this utility model. Figure 1 .

[0023] Figure 2 This is a schematic diagram of the structure of a ventilation cap according to this utility model. Figure 2 .

[0024] Figure 3 This is an exploded view of a ventilation cap according to this utility model.

[0025] Figure 4 This is a front view of a ventilation cap according to this utility model.

[0026] Figure 5 yes Figure 4 Sectional view at point AA.

[0027] Figure 6 yes Figure 5 A magnified view of a section at point B.

[0028] Figure 7 This is a schematic diagram of the structure of an inverted cone-shaped air guide umbrella in a ventilation cap according to this utility model.

[0029] Figure 8 This is a schematic diagram of another embodiment of the ventilation cap of this utility model. Figure 1 .

[0030] Figure 9 This is a schematic diagram of another embodiment of the ventilation cap of this utility model. Figure 2 .

[0031] Figure 10 This is a schematic diagram of the internal structure of another embodiment of the ventilation cap of this utility model.

[0032] As shown in the figure:

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

[0034] To make the objectives, technical solutions, and advantages of the utility model embodiments clearer, the technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. The components of the utility model embodiments described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0035] In the description of the embodiments of the utility model, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," or "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first," "second," and "third" are only used 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 "sag" does not imply that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

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

[0038] In the description of the embodiments of the utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the utility model according to the specific circumstances.

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

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

[0041] Specifically, the clamp interface component 9 is a clamp, and a set of annular protrusions 12 are provided at intervals at the lower part of the air duct 1. The annular protrusions 12 are arranged at intervals 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 component 9 and enhances the stability of the connection.

[0042] The clamp interface assembly 9 is located between the annular protrusions 12. The annular protrusions 12 limit the clamp interface assembly 9, and the clamping and loosening operation of the clamp interface assembly 9 only requires 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 duct, providing an axial positioning reference for the clamp interface assembly 9 and preventing axial slippage during installation.

[0044] The lower part of the duct 1 is provided with multiple contraction joints 13 extending along its axial direction, which divide the duct 1 into multiple flexible petal structures, giving it radial deformation capability, enabling it to adapt to pipes of different diameters, and improving the versatility and flexibility of the duct 1.

[0045] In practical implementation, the bottom end of the air duct 1 is fitted onto the external pipe. The bottom of the air duct 1 is transformed into an elastic structure through the contraction joint 13, which can meet the adaptation requirements of the air duct with pipes of different diameters. At the same time, through the fastening effect of the clamp interface component 9, the air duct 1 can be tightly connected to the external pipe, realizing a detachable and sealed connection. This not only makes installation convenient, but also facilitates maintenance or replacement, greatly improving the ease of use and maintenance efficiency of the air duct 1.

[0046] The top of the air duct 1 is connected to a filter screen 4. The filter screen 4 is detachably connected to the air duct 1 by bolts, which facilitates disassembly for cleaning and maintains the cleanliness and ventilation performance of the filter screen 4.

[0047] Specifically, the filter 4 has a cylindrical structure, which can ensure its ventilation area. 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, intercept larger impurities carried in the air, prevent them from entering the ventilation system, ensure the quality of the ventilated air, and reduce the wear of impurities on the internal components of the ventilation system.

[0048] The top of the filter screen 4 is connected to the rain cover 3 via the cap 5. The rain cover 3 has a hollow trapezoidal cross-section with an open bottom, forming an outwardly expanding guide surface, allowing rainwater to flow downwards along the outer surface of the rain cover 3. At the same time, the diameter of the bottom opening of the rain cover 3 is larger than the diameter of the filter screen 4, preventing rainwater from directly entering the air duct 1, ensuring the normal ventilation function of the ventilation cap in rainy weather, and providing a certain degree of protection for its internal structure.

[0049] Specifically, the cover 5 is fitted onto the top of the filter screen 4, and its top edge has a connecting ring that connects to the rain cover 3. The cover 5 and the filter screen 4, as well as the connecting ring on the top of the cover 5 and the rain cover 3, are all detachably connected by bolts, making installation and disassembly convenient. The cover 5 ensures the airtight connection between the filter screen 4 and the air duct 1 and the rain cover 3, preventing rainwater and unfiltered air from entering through the connection gaps and improving the overall sealing performance of the ventilation cap.

[0050] The inner side of the rain cover 3 is provided with an inverted cone-shaped deflector umbrella 2 connected to the upper part of the air duct 1. The inverted cone-shaped deflector umbrella 2 is fitted onto the air duct 1 and its bottom is connected to the air duct 1. Its upper part is in contact with the inside of the rain cover 3. The rain cover 3, the inverted cone-shaped deflector umbrella 2 and the air duct 1 form a closed space to avoid direct contact between the filter 4 and the outside, and reduce the direct contact and damage of external objects (such as branches, debris, etc.) to the filter 4. At the same time, it further blocks rainwater, dust and other external elements from entering the ventilation system, and enhances the protective performance of the ventilation cap.

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

[0052] Meanwhile, the outer circumference of the inverted cone-shaped deflector umbrella 2 is provided with multiple fixing strips 15 that cooperate with the rain cover 3. The fixing strips 15 are L-shaped in general and are detachably connected to the inverted cone-shaped deflector umbrella 2 and the rain cover 3 by bolts.

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

[0054] The inverted cone-shaped air guide umbrella 2 is provided with an air inlet 7 that cooperates with the spiral air guide plate 6 to ensure that the airflow can effectively enter the interior of the ventilation cap through the inverted cone-shaped air guide umbrella 2.

[0055] Meanwhile, the spiral guide vane 6 can block the air inlet 7, preventing debris from entering the ventilation cap through the air inlet 7.

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

[0057] The annular airflow guide duct 8 has a V-shaped bend in its radial cross section. Its outer top is connected to the inner edge of the rain cover 3, and its inner top is connected to the edge of the filter screen 4. Its V-shaped bend bottom is connected to the inverted cone-shaped airflow guide umbrella 2, so that the annular airflow guide duct 8 can change the direction of airflow and form a specific airflow channel.

[0058] The outer side of the annular airflow guide duct 8 is set parallel to the outer wall of the inverted cone-shaped airflow guide umbrella 2. The height of the outer side of the annular airflow guide duct 8 is greater than the height of its inner side. The bottom of the outer side of the annular airflow guide duct 8 is provided with an airflow guide 10 corresponding to the air inlet 7. The airflow guide 10 overlaps 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 airflow guide duct 8. Through the V-shaped bending structure of the annular airflow guide duct 8 and the cooperation of the air inlet 7, a three-level airflow deflection is formed, thereby forming a stepped continuous airflow path with an outer bottom and an inner top.

[0059] Specifically:

[0060] First, the airflow enters the ventilation 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 enters the annular guide duct 8 after passing through the air inlet 10 on the outer side of the inverted cone-shaped guide umbrella 2. The airflow velocity direction is reversed, causing the airflow to climb along the inner side of the annular guide duct 8.

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

[0063] Meanwhile, through the cooperation of the spiral guide vane 6 and the annular guide duct 8, the airflow moves in a rotating motion within the ventilation cap. When the airflow enters the space between the inverted cone-shaped guide umbrella 2 and the annular guide duct 8 through the air inlet 7, the centrifugal force of the airflow throws water droplets or dust in the air toward the bottom outer side of the inverted cone-shaped guide umbrella 2, thereby accumulating dust or water droplets.

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

[0065] During implementation, the rotating airflow will collect the rainwater or dust thrown out by centrifugal force along the outer side of the annular guide duct 8 to the bottom of the inverted cone-shaped guide umbrella 2, and then discharge it through the drainage and dust removal port 11.

[0066] In another embodiment, when the ventilation cap is installed facing downwards, the cover 5 is connected to the bottom of the inverted cone-shaped air guide umbrella 2, the bottom end of the filter screen 4 is sleeved with the cover 5, the upper end of the air duct 1 is set facing downwards and extends into the rain cover 3 and is connected to the rain cover 3 through the connecting ring 14, so as to realize the assembly of the ventilation cap.

[0067] In specific implementation of this utility model:

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

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

[0070] At this point, the airflow first comes into contact with the radially distributed spiral guide vanes 6, which apply a tangential force to the airflow, transforming it into a high-speed rotating flow.

[0071] High-density water droplets / dust particles in the rotating airflow are thrown outward by centrifugal force towards the outside of the inverted cone-shaped air guide umbrella 2, achieving preliminary filtration and purification of the air.

[0072] 2) Labyrinth-style airflow purification and redirection:

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

[0074] First, the airflow enters the ventilation 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 enters the annular guide duct 8 after passing through the air inlet 10 on the outer side of the inverted cone-shaped guide umbrella 2. The airflow velocity direction is reversed, causing the airflow to climb along the inner side of the annular guide duct 8.

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

[0077] Meanwhile, through the cooperation of the spiral guide vane 6 and the annular guide duct 8, the airflow moves in a rotating motion within the ventilation cap, forcing the centrifugally ejected debris to slide down the outer wall to the bottom of the inverted cone-shaped guide umbrella 2, and then discharge it through the drainage and dust removal port 11, thus avoiding the accumulation of debris that affects ventilation.

[0078] 3) Clean airflow output:

[0079] The filtered air is transported downwards through a straight airflow path formed inside the duct 1, and connects to an external duct via the clamp interface assembly 9 at the bottom, thus realizing air exchange in the ventilation system. At this time, the filter 4 further filters the air entering the duct 1.

[0080] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A ventilation cap, characterized in that: Includes air duct (1), inverted cone-shaped air guide umbrella (2), and rain 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 rain shield (3) through a cover (5). The inner side of the rain shield (3) is provided with an inverted cone-shaped air guide umbrella (2) connected to the upper part of the air duct (1). The inverted cone-shaped air guide umbrella (2) is provided with multiple radially distributed spiral air guide plates (6). The inverted cone-shaped air guide umbrella (2) is provided with an air inlet (7) that cooperates with the spiral air guide plates (6). An annular air guide channel (8) is provided between the inverted cone-shaped air guide umbrella (2) and the filter screen (4). The annular air guide channel (8) and the air inlet (7) form a labyrinth-like airflow channel. The bottom of the air duct (1) is provided with a clamp interface assembly (9) that is connected to the pipe.

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

3. A ventilation cap according to claim 2, characterized in that: The height of the outer side of the annular air guide duct (8) is greater than the height of its inner side. The bottom of the outer side of the annular air guide duct (8) is provided with an air guide (10) corresponding to the air inlet (7). The air guide (10) overlaps 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 air guide duct (8).

4. A ventilation cap according to claim 1, characterized in that: It also includes drainage and dust removal ports (11), and multiple drainage and dust removal ports (11) are circumferentially arranged on the outer side of the bottom of the inverted cone-shaped guide umbrella (2), and their opening direction is parallel to the axis of the air duct (1).

5. A ventilation cap according to claim 1, characterized in that: The clamp interface assembly (9) is a clamp, and a set of annular protrusions (12) are spaced apart at the lower part of the air duct (1). The clamp interface assembly (9) is located between the annular protrusions (12), and the lower part of the air duct (1) is provided with multiple contraction joints (13) extending along its axial direction.

6. A ventilation cap according to claim 1, characterized in that: The filter (4) is detachably connected to the cover (5), the air duct (1), and the cover (5) and the rain cover (3) by bolts.

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

8. A ventilation cap according to claim 7, characterized in that: The inverted cone-shaped deflector umbrella (2) has multiple fixing strips (15) on its outer circumference that cooperate with the rain cover (3). The fixing strips (15) are detachably connected to the inverted cone-shaped deflector umbrella (2) and the rain cover (3) by bolts.

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