Device for achieving air exhaust non-return through inclined angle

Abstract

The utility model discloses a device for realizing air exhaust non-return by utilizing an inclined angle, which comprises an air exhaust pipe, a first fixing plate is arranged on the outer wall of one end of the air exhaust pipe, first fixing holes are equidistantly arranged on the outer side of the air exhaust pipe on the first fixing plate, and an inclined opening is arranged at one end of the air exhaust pipe far away from the first fixing plate. And an inclined plate is arranged on the outer wall of the inclined opening. The utility model relates to the technical field of pneumatic fluid engineering, and solves the problems that in the prior art, a flue check valve cannot be closed completely due to tobacco tar accumulation or poor closing, when a range hood is not used, oil fume exhausted by other users is easy to flow backwards from the check valve, and especially in a high-rise building, oil fume cannot be exhausted from the check valve. The problem is more prominent when multiple users discharge at the same time, and the living quality of residents is influenced.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic fluid engineering technology, specifically a device for achieving backflow prevention by utilizing an oblique angle. Background Technology

[0002] Range hoods are connected to the flue via a retractable exhaust pipe and a backflow preventer. The powerful suction of the range hood quickly draws in cooking fumes, steam, and odors from the kitchen, ensuring that the fumes are smoothly exhausted outdoors. The backflow preventer is typically fixed directly to the flue. However, in current technology, due to grease buildup or poor closure, the backflow preventer often fails to close completely. When the range hood is not in use, fumes from other users can easily flow back through the backflow preventer, a problem particularly pronounced in high-rise buildings where multiple users are simultaneously venting, impacting residents' quality of life. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a device that uses an oblique angle to prevent backflow of exhaust fumes. This solves the problem that in existing technologies, the flue backflow preventer valve often cannot be completely closed due to the accumulation of grease or poor closure. When the range hood is not in use, the fumes discharged by other users can easily backflow through the backflow preventer valve, which is especially prominent in high-rise buildings when multiple users are venting at the same time, affecting the quality of life of residents.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a device for preventing backflow of exhaust air using an oblique angle, comprising an exhaust pipe, a first fixing plate provided on the outer wall of one end of the exhaust pipe, a first fixing hole provided at equal intervals on the outer side of the first fixing plate, an oblique opening provided on the end of the exhaust pipe away from the first fixing plate, and an oblique plate provided on the outer wall of the oblique opening.

[0005] Preferably, a corrugated connecting pipe is provided on the side of the first fixing plate away from the exhaust pipe, and a second fixing plate is provided on the end of the corrugated connecting pipe away from the first fixing plate. The second fixing plate is provided with second fixing holes at equal intervals on the outer side of the corrugated connecting pipe.

[0006] Preferably, the inner wall of the second fixing plate is fitted with a first sealing ring, and a limit ring is provided at the end of the first sealing ring away from the first fixing plate. The limit ring is fitted with the second fixing plate, and the inner wall of the first sealing ring is provided with an outward flare at the end near the limit ring.

[0007] Preferably, the outer wall of the exhaust pipe is fitted with a second sealing ring, and the outer wall of the second sealing ring is provided with convex rings at equal intervals.

[0008] Preferably, the inclined plate is provided with a third fixing hole at equal intervals on the outer side of the inclined opening.

[0009] This utility model provides a device for preventing backflow of exhaust gas using an angled design. It offers the following advantages: This device, utilizing an angled design to prevent backflow of exhaust gas, employs a combination of an exhaust pipe, a first fixing plate, a first fixing hole, an angled opening, and an angled plate. The upward-sloping opening at the end of the exhaust pipe increases its area. When the exhaust system is not in use, natural airflow through the flue creates a negative pressure zone at the end of the exhaust pipe, effectively preventing fumes from entering. Furthermore, the angled structure forces airflow upwards, allowing the fumes to bypass the exhaust pipe and flow upwards, reducing backflow caused by the horizontal discharge of traditional backflow preventers and further improving the backflow prevention effect. This contributes to improving the quality of life for residents.

[0010] By cooperating with the first fixing plate, the corrugated connecting pipe, the second fixing plate, and the second fixing hole, the retractable exhaust pipe is inserted into the interior of the second fixing plate, or the check valve is fixed to the second fixing plate by using bolts inserted into the second fixing hole. This connects the retractable exhaust pipe or check valve to the corrugated connecting pipe. By setting the corrugated connecting pipe between the first fixing plate and the second fixing plate, the elasticity and flexibility of the corrugated connecting pipe can be utilized to improve the connection flexibility and stability between the exhaust pipe and the retractable exhaust pipe or check valve, thus facilitating the installation of the check valve. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a top view of the structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the appearance of the present utility model;

[0014] Figure 4 for Figure 1 A magnified view of a portion of region A in the middle;

[0015] Figure 5 for Figure 2 A magnified view of a portion of region B in the middle.

[0016] In the diagram: 1. Exhaust pipe; 2. First fixing plate; 3. First fixing hole; 4. Angled opening; 5. Angled plate; 6. Corrugated connecting pipe; 7. Second fixing plate; 8. Second fixing hole; 9. First sealing ring; 10. Limiting ring; 11. Outward flare; 12. Second sealing ring; 13. Raised ring; 14. Third fixing hole. Detailed Implementation

[0017] 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.

[0018] In existing technologies, flue gas backflow preventers often fail to close completely due to grease buildup or poor closure. When the range hood is not in use, grease emitted by other users can easily backflow through the backflow preventer. This problem is particularly prominent in high-rise buildings when multiple users are emitting grease simultaneously, affecting the quality of life of residents.

[0019] In view of this, the present invention provides a device for preventing backflow of exhaust gas using an oblique angle. Through the cooperation between the exhaust pipe, the first fixing plate, the first fixing hole, the oblique opening and the oblique plate, the end of the exhaust pipe adopts an upwardly inclined opening design to increase the area of ​​the end opening. When the exhaust equipment is not in use, the natural air intake of the flue forms a certain negative pressure area at the end of the exhaust pipe, which effectively prevents the smoke from entering the exhaust pipe. The oblique angle structure forces the airflow upward, allowing the oil fume airflow to bypass the exhaust pipe and be discharged upward, reducing the backflow of smoke caused by the horizontal discharge of traditional backflow preventer valves, and further improving the backflow prevention effect of oil fume.

[0020] Depend on Figure 1-5 It is known that a device for preventing backflow of exhaust air by using an oblique angle includes an exhaust pipe 1. A first fixing plate 2 is provided on the outer wall of one end of the exhaust pipe 1. The first fixing plate 2 is provided with first fixing holes 3 at equal intervals on the outer side of the exhaust pipe 1. An oblique opening 4 is provided at the end of the exhaust pipe 1 away from the first fixing plate 2. An oblique plate 5 is provided on the outer wall of the oblique opening 4. The oblique plate 5 can guide the airflow of oil fumes and ensure that the oil fumes can be discharged smoothly along a predetermined path.

[0021] In the specific implementation process, it is worth noting that through the cooperation between the exhaust pipe 1, the first fixing plate 2, and the first fixing hole 3, the exhaust pipe 1 is inserted into the exhaust hole of the flue, the first fixing plate 2 is attached to the outer wall of the flue, and then fixed to the flue through the first fixing hole 3 and matching fasteners or nail-free adhesive, thus achieving a stable installation of the exhaust pipe 1 and the flue. The end of the exhaust pipe 1 near the first fixing plate 2 is connected to a retractable exhaust pipe or a check valve. The inclined plate 5 can guide the airflow of oil fumes, ensuring that the oil fumes can be smoothly discharged along the predetermined path, avoiding the oil fumes from being trapped in the exhaust fan. The accumulation and stagnation inside pipe 1 are mitigated by the cooperation between exhaust pipe 1, first fixed plate 2, first fixed hole 3, inclined opening 4 and inclined plate 5. The end of exhaust pipe 1 adopts an upward inclined opening design to increase the area of ​​the end opening. When the smoke exhaust equipment is not in use, the natural air intake of the flue forms a certain negative pressure area at the end of exhaust pipe 1, which effectively prevents smoke from entering exhaust pipe 1. The inclined structure forces the airflow upward, allowing the oily smoke to bypass exhaust pipe 1 and be discharged upward, reducing the backflow of smoke caused by the horizontal discharge of traditional backflow preventer valves, further improving the backflow prevention effect of oily smoke and improving the quality of life of residents.

[0022] Furthermore, a corrugated connecting pipe 6 is provided on the side of the first fixing plate 2 away from the exhaust pipe 1, and a second fixing plate 7 is provided on the end of the corrugated connecting pipe 6 away from the first fixing plate 2. The second fixing plate 7 is provided with second fixing holes 8 at equal intervals on the outer side of the corrugated connecting pipe 6.

[0023] In the specific implementation process, it is worth noting that, through the cooperation between the first fixing plate 2, the corrugated connecting pipe 6, the second fixing plate 7, and the second fixing hole 8, the retractable exhaust pipe is inserted into the interior of the second fixing plate 7, or the check valve is fixed to the second fixing plate 7 by using bolts inserted into the second fixing hole 8, thereby realizing the connection between the retractable exhaust pipe or the check valve and the corrugated connecting pipe 6. By setting the corrugated connecting pipe 6 between the first fixing plate 2 and the second fixing plate 7, the flexibility and stability of the connection between the exhaust pipe 1 and the retractable exhaust pipe or the check valve are improved by utilizing the extensibility and flexibility of the corrugated connecting pipe 6.

[0024] Furthermore, the inner wall of the second fixing plate 7 is fitted with a first sealing ring 9. A limit ring 10 is provided at the end of the first sealing ring 9 away from the first fixing plate 2. The limit ring 10 is fitted with the second fixing plate 7. An outward flare 11 is provided at the end of the inner wall of the first sealing ring 9 near the limit ring 10. The outward flare 11 is used to improve the convenience of inserting the retractable exhaust pipe into the anti-reverse device interface.

[0025] In the specific implementation process, it is worth noting that, through the cooperation between the second fixing plate 7, the first sealing ring 9 and the limiting ring 10, the first sealing ring 9 is inserted into the interface end of the second fixing plate 7, and the limiting ring 10 is used to limit the first sealing ring 9 to prevent it from shifting or falling off during use. When the interface of the check valve is connected to the retractable exhaust pipe or check valve, the sealing effect at the interface is improved by the first sealing ring 9 and the limiting ring 10. The flared opening 11 is used to improve the convenience of inserting the retractable exhaust pipe into the interface of the check valve.

[0026] Furthermore, a second sealing ring 12 is connected to the outer wall of the exhaust pipe 1. The outer wall of the second sealing ring 12 is provided with convex rings 13 at equal intervals. The design of the convex rings 13 can increase the elasticity of the second sealing ring 12, so that it can better adapt to the shape and size of the flue exhaust port during installation and use, and ensure the reliability and durability of the seal.

[0027] In the specific implementation process, it is worth noting that, through the cooperation between the exhaust pipe 1, the second sealing ring 12 and the convex ring 13, after the first fixing plate 2 is fixed to the flue, the second sealing ring 12 fits tightly against the inner wall of the flue's exhaust port, effectively preventing oil fumes from leaking from the gap between the exhaust pipe 1 and the flue's exhaust port, further improving the sealing effect. The design of the convex ring 13 can increase the elasticity of the second sealing ring 12, allowing it to better adapt to the shape and size of the flue's exhaust port during installation and use, ensuring the reliability and durability of the seal.

[0028] Furthermore, the inclined plate 5 is provided with third fixing holes 14 at equal intervals on the outer side of the inclined opening 4.

[0029] In the specific implementation process, it is worth noting that by cooperating with the inclined plate 5 and the third fixing hole 14, and by inserting bolts into the third fixing hole 14, the insect-proof net is fixed to the inclined plate 5, which effectively prevents cockroaches, birds or other debris from entering the flue and keeps the flue clean and unobstructed.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preventing backflow of exhaust air using an oblique angle, comprising an exhaust pipe (1), characterized in that: The exhaust pipe (1) has a first fixing plate (2) on its outer wall at one end. The first fixing plate (2) has a first fixing hole (3) at equal intervals on the outer side of the exhaust pipe (1). The exhaust pipe (1) has a slanted opening (4) at the end away from the first fixing plate (2). The outer wall of the slanted opening (4) has a slanted plate (5).

2. The device for preventing backflow of exhaust air using an oblique angle as described in claim 1, characterized in that: A corrugated connecting pipe (6) is provided on the side of the first fixing plate (2) away from the exhaust pipe (1). A second fixing plate (7) is provided on the end of the corrugated connecting pipe (6) away from the first fixing plate (2). The second fixing plate (7) is provided with second fixing holes (8) at equal intervals on the outer side of the corrugated connecting pipe (6).

3. The device for preventing backflow of exhaust air using an oblique angle according to claim 2, characterized in that: The inner wall of the second fixing plate (7) is fitted with a first sealing ring (9). A limit ring (10) is provided at the end of the first sealing ring (9) away from the first fixing plate (2). The limit ring (10) is fitted with the second fixing plate (7). An outward flare (11) is provided at the end of the inner wall of the first sealing ring (9) near the limit ring (10).

4. The device for preventing backflow of exhaust air using an oblique angle as described in claim 1, characterized in that: The outer wall of the exhaust pipe (1) is fitted with a second sealing ring (12), and the outer wall of the second sealing ring (12) is provided with convex rings (13) at equal intervals.

5. The device for preventing backflow of exhaust air using an oblique angle according to claim 1, characterized in that: The inclined plate (5) is provided with a third fixing hole (14) at equal intervals on the outside of the inclined opening (4).

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