Device for preventing kitchen exhaust gas from flowing backwards

Abstract

The utility model relates to a kitchen exhaust backflow preventing device, and belongs to the technical field of kitchen exhaust. Comprising an exhaust pipe, an exhaust fan body fixed to the right side of the exhaust pipe, a public exhaust flue fixed to the left side of the exhaust pipe, and a baffle hinged to the left side of the exhaust pipe through a hinge. The buffer assembly is mounted in the exhaust pipe and is used for enabling the anti-backflow mechanism to be used more stably; and the anti-backflow mechanism comprises a blocking assembly which is mounted in the exhaust pipe and is used for blocking flue gas. According to the device for preventing the kitchen exhaust gas from flowing backwards, the sealing performance of the kitchen flue can be effectively ensured, so that the situation of exhaust gas flowing backwards of the kitchen flue is effectively avoided, the situation that the living experience of residents is seriously affected by kitchen exhaust gas flowing backwards is avoided, the physical and psychological health of the residents is ensured, and the device is low in cost in the using process and easy to popularize. The practicability of the kitchen exhaust backflow prevention device is improved.

Description

Technical Field

[0001] This utility model relates to the field of kitchen exhaust technology, and in particular to a device for preventing backflow of kitchen exhaust. Background Technology

[0002] Kitchen exhaust gas refers to the harmful gases produced during the heating of cooking oil and food. Poor exhaust gas emissions may affect the normal life of a family. A flue is a tubular device for emitting exhaust gas and smoke. A residential flue is a vertical pipe product used to exhaust kitchen fumes or bathroom exhaust gas. It is also called an exhaust duct, ventilation duct, or residential exhaust duct.

[0003] Existing kitchen exhaust systems typically use simple exhaust fans for ventilation. However, in high-rise buildings or when multiple households share an exhaust pipe, relying solely on exhaust fans to prevent backflow of kitchen exhaust can lead to poor sealing and potential backflow. This results in unpleasant odors filling the kitchen, severely impacting the residents' living experience and even their physical and mental health, thus reducing the practicality of existing kitchen exhaust systems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a device for preventing backflow of kitchen exhaust gas, which has the advantages of effectively preventing backflow of exhaust gas from kitchen flues and solves the problem of low practicality of existing kitchen flue exhaust methods.

[0005] To achieve the above-mentioned objective of effectively preventing backflow of exhaust gas from kitchen exhaust ducts, this application provides the following technical solution: a device for preventing backflow of kitchen exhaust gas, comprising an exhaust pipe, an exhaust fan body fixed to the right side of the exhaust pipe, a common exhaust duct fixed to the left side of the exhaust pipe, a baffle hinged to the left side of the exhaust pipe, an anti-backflow mechanism for preventing backflow of kitchen exhaust gas installed inside the exhaust pipe, and a buffer component installed inside the exhaust pipe to make the anti-backflow mechanism more stable.

[0006] The backflow prevention mechanism includes a blocking component installed inside the exhaust pipe to block the smoke, and an exhaust component installed inside the exhaust pipe to discharge the smoke.

[0007] The exhaust assembly includes two fixed posts respectively fixed to the top and bottom walls of the exhaust pipe, two cylinders respectively fixed to opposite ends of the two fixed posts, a first spring fixed inside the cylinders, a first telescopic rod fixed inside the cylinders, a movable plate slidably connected inside the cylinders, a connecting rope fixed to the left side of the movable plate, and a connecting post fixed to the left side of the fixed posts.

[0008] By adopting the above technical solution, backflow of exhaust gas in the kitchen flue can be effectively prevented.

[0009] Furthermore, the blocking assembly includes two fixed plates respectively fixed to the top and bottom walls of the exhaust pipe, a movable plate hinged to the left side of the fixed plates, and rubber plates respectively fixed to opposite sides of the two movable plates.

[0010] By adopting the above technical solution, it can be ensured that the exhaust pipe can correctly and effectively discharge flue gas.

[0011] Furthermore, the buffer assembly includes two second telescopic rods respectively fixed to the top and bottom walls of the exhaust pipe, two second springs respectively fixed to the top and bottom walls of the exhaust pipe, and two spheres respectively fixed to opposite sides of the two second telescopic rods.

[0012] By adopting the above technical solution, a buffering effect can be ensured.

[0013] Furthermore, the two second springs are fixed on opposite sides to the opposite sides of the two spheres, and the second springs are located on the outside of the second telescopic rod.

[0014] By adopting the above technical solution, it is ensured that the elastic force of the second spring can act on the sphere.

[0015] Furthermore, a limiting plate is fixed to the right side of the fixed plate, and the left side of the limiting plate is in close contact with the right side of the movable plate.

[0016] By adopting the above technical solution, it is ensured that the limiting plate can effectively prevent the movable plate from rotating to the right.

[0017] Furthermore, the left side of the connecting rope is fixed to the right side of the movable plate, and the left end of the connecting column is fixed to the right side of the fixed plate.

[0018] By adopting the above technical solution, it is ensured that the movable plate can be moved left and right by the connecting rope.

[0019] Furthermore, the diameter of the movable plate is equal to the inner diameter of the cylinder, and the left sides of both the first spring and the first telescopic rod are fixed to the movable plate.

[0020] By adopting the above technical solution, it is ensured that the moving plate can be restored to its original position under the action of the first spring and the first telescopic rod.

[0021] Furthermore, the width of the rubber plate is equal to the inner diameter of the exhaust pipe, and the length of the rubber plate is equal to the length of the movable plate.

[0022] By adopting the above technical solution, a better sealing effect can be achieved through the rubber sheet.

[0023] Compared with the prior art, this utility model provides a device to prevent kitchen exhaust backflow, which has the following beneficial effects:

[0024] This backflow prevention device for kitchen exhaust, through the combined use of an exhaust pipe, a common exhaust duct, a baffle, a movable plate in the backflow prevention mechanism, a connecting rope, and a movable plate, effectively ensures the sealing of the kitchen exhaust duct in high-rise buildings or situations where multiple households share an exhaust pipe. This effectively prevents backflow of kitchen exhaust, thus avoiding serious impacts on residents' living experience and ensuring their physical and mental health. Furthermore, it is relatively inexpensive to use, enhancing the practicality of the backflow prevention device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this application;

[0026] Figure 2 This is a three-dimensional schematic diagram of the movable plate connection structure in this application.

[0027] Figure 3 This is a right-side sectional view of the structure of this utility model;

[0028] Figure 4 This is a partially enlarged schematic diagram of part A in the structure of this utility model.

[0029] In the diagram: 1. Exhaust pipe; 2. Exhaust fan body; 3. Common exhaust flue; 4. Baffle; 200. Anti-backflow mechanism; 201. Blocking assembly; 2011. Fixed plate; 2012. Movable plate; 2013. Rubber plate; 202. Exhaust assembly; 2021. Fixed column; 2022. Cylinder; 2023. First spring; 2024. First telescopic rod; 2025. Moving plate; 2026. Connecting rope; 2027. Connecting column; 2028. Limiting plate; 300. Buffer assembly; 301. Second telescopic rod; 302. Second spring; 303. Sphere. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] Please see Figure 1-4This utility model provides a technical solution: a device for preventing kitchen exhaust backflow, including an exhaust pipe 1, an exhaust fan body 2 fixed to the right side of the exhaust pipe 1, a common exhaust flue 3 fixed to the left side of the exhaust pipe 1, a baffle 4 hinged to the left side of the exhaust pipe 1, an anti-backflow mechanism 200 for preventing kitchen exhaust backflow installed inside the exhaust pipe 1, and a buffer component 300 installed inside the exhaust pipe 1 to make the anti-backflow mechanism 200 more stable.

[0032] By using the exhaust pipe 1, the public exhaust flue 3, the baffle 4, and the backflow prevention mechanism 200 in combination, the airtightness of the kitchen flue can be effectively ensured in high-rise buildings or in cases where multiple households share an exhaust pipe. This effectively prevents backflow of kitchen exhaust and avoids serious impacts on the living experience of residents, ensuring their physical and mental health. Furthermore, the cost of use is relatively low, improving the practicality of the backflow prevention device.

[0033] In this embodiment, the anti-backflow mechanism 200 is a structure that prevents kitchen exhaust from backflowing.

[0034] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the anti-backflow mechanism 200 includes a blocking component 201 installed inside the exhaust pipe 1 to block the smoke, and an exhaust component 202 installed inside the exhaust pipe 1 to discharge the smoke.

[0035] In this embodiment, the blocking component 201 is a structure used to block kitchen exhaust.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, the blocking assembly 201 includes two fixed plates 2011 fixed to the inner top wall and inner bottom wall of the exhaust pipe 1 respectively, a movable plate 2012 hinged to the left side of the fixed plate 2011 by a hinge, and rubber plates 2013 fixed to opposite sides of the two movable plates 2012 respectively.

[0037] It should be noted that the width of the rubber plate 2013 is equal to the inner diameter of the exhaust pipe 1, the length of the rubber plate 2013 is equal to the length of the movable plate 2012, the fixed plate 2011 is an arc-shaped plate that fits against the inner wall of the exhaust pipe 1, and the movable plate 2012 is a trapezoidal plate whose outer side fits against the inside of the exhaust pipe 1, to ensure that the exhaust pipe 1 can be sealed.

[0038] In this embodiment, the exhaust assembly 202 is a structure used for emitting flue gas.

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the exhaust assembly 202 includes two fixed columns 2021 fixed to the top and bottom walls of the exhaust pipe 1, two cylinders 2022 fixed to opposite ends of the two fixed columns 2021, a first spring 2023 fixed inside the cylinders 2022, a first telescopic rod 2024 fixed inside the cylinders 2022, a movable plate 2025 slidably connected inside the cylinders 2022, a connecting rope 2026 fixed to the left side of the movable plate 2025, and a connecting column 2027 fixed to the left side of the fixed columns 2021.

[0040] It should be noted that a limit plate 2028 is fixed to the right side of the fixed plate 2011, and the left side of the limit plate 2028 is in close contact with the right side of the movable plate 2012, ensuring that the limit plate 2028 can effectively prevent the movable plate 2012 from rotating to the right.

[0041] In addition, the left side of the connecting rope 2026 is fixed to the right side of the movable plate 2012 to ensure that the movable plate 2012 can be moved and adjusted left and right through the connecting rope 2026. The left end of the connecting column 2027 is fixed to the right side of the fixed plate 2011 to fix the connecting column 2027.

[0042] In addition, the diameter of the movable plate 2025 is equal to the inner diameter of the cylinder 2022, which can effectively prevent flue gas from entering the cylinder 2022, thereby improving the service life of the first spring 2023. The left sides of the first spring 2023 and the first telescopic rod 2024 are fixed to the movable plate 2025 to ensure that the movable plate 2025 can return to its original position under the action of the first spring 2023 and the first telescopic rod 2024.

[0043] In this embodiment, the buffer component 300 is a structure that buffers the blocking component 201.

[0044] like Figure 1 As shown, the buffer assembly 300 includes two second telescopic rods 301 respectively fixed to the inner top wall and inner bottom wall of the exhaust pipe 1, two second springs 302 respectively fixed to the inner top wall and inner bottom wall of the exhaust pipe 1, and two spheres 303 respectively fixed to the opposite side of the two second telescopic rods 301.

[0045] It should be noted that the opposite sides of the two second springs 302 are fixed to the opposite sides of the two spheres 303, ensuring that the elastic force of the second springs 302 can act on the spheres 303. The second springs 302 are located outside the second telescopic rod 301, and under the action of the second telescopic rod 301, the second springs 302 can achieve the expected elastic effect.

[0046] The working principle of the above embodiments is as follows:

[0047] When in use, the exhaust fan body 2 operates, discharging kitchen fumes into the exhaust pipe 1. The fumes then push open the movable plate 2012, causing it to rotate. At this time, the connecting rope 2026 drives the moving plate 2025 to move to the left, compressing the first spring 2023. The movable plate 2012 then comes into close contact with the ball 303. The ball 303, the second telescopic rod 301, and the second spring 302 stabilize the movable plate 2012, allowing the fumes to escape through a gap between the two movable plates 2012 and into the common exhaust duct 3. When the exhaust fan body 2 is turned off after use, without the impact of fumes, the restoring force of the first spring 2023 causes the movable plate 2012 to return to its original position, ensuring the airtightness of the exhaust pipe 1.

[0048] Compared with existing technologies, this kitchen exhaust backflow prevention device, through the coordinated use of exhaust pipe 1, common exhaust flue 3, baffle 4, movable plate 2012 in the backflow prevention mechanism 200, connecting rope 2026 and movable plate 2025, can effectively ensure the sealing of the kitchen flue in high-rise buildings or in cases where multiple households share an exhaust pipe. This effectively prevents backflow of kitchen exhaust, thus avoiding serious impacts on residents' living experience caused by kitchen exhaust backflow, ensuring residents' physical and mental health. Furthermore, it is relatively inexpensive to use, improving the practicality of the kitchen exhaust backflow prevention device and solving the problem of low practicality of existing kitchen flue exhaust methods.

Claims

1. A backdraft prevention device for a kitchen exhaust, comprising: Includes an exhaust pipe (1), an exhaust fan body (2) fixed to the right side of the exhaust pipe (1), a common exhaust flue (3) fixed to the left side of the exhaust pipe (1), a baffle (4) hinged to the left side of the exhaust pipe (1), an anti-backflow mechanism (200) for preventing kitchen exhaust backflow installed inside the exhaust pipe (1), and a buffer component (300) installed inside the exhaust pipe (1) to make the anti-backflow mechanism (200) use a more stable buffer. The backflow prevention mechanism (200) includes a blocking component (201) installed inside the exhaust pipe (1) for blocking the smoke, and an exhaust component (202) installed inside the exhaust pipe (1) for discharging the smoke. The exhaust assembly (202) includes two fixed columns (2021) fixed to the inner top wall and inner bottom wall of the exhaust pipe (1), two cylinders (2022) fixed to opposite ends of the two fixed columns (2021), a first spring (2023) fixed inside the cylinder (2022), a first telescopic rod (2024) fixed inside the cylinder (2022), a movable plate (2025) slidably connected inside the cylinder (2022), a connecting rope (2026) fixed to the left side of the movable plate (2025), and a connecting column (2027) fixed to the left side of the fixed column (2021).

2. A device for preventing backflow of kitchen exhaust according to claim 1, characterized in that: The blocking assembly (201) includes two fixed plates (2011) fixed to the inner top wall and inner bottom wall of the exhaust pipe (1), a movable plate (2012) hinged to the left side of the fixed plate (2011) by a hinge, and rubber plates (2013) fixed to the opposite side of the two movable plates (2012).

3. The device for preventing backflow of kitchen exhaust according to claim 1, wherein: The buffer assembly (300) includes two second telescopic rods (301) fixed to the inner top wall and inner bottom wall of the exhaust pipe (1), two second springs (302) fixed to the inner top wall and inner bottom wall of the exhaust pipe (1), and two spheres (303) fixed to opposite sides of the two second telescopic rods (301).

4. A device for preventing backflow of kitchen exhaust gas according to claim 3, characterized in that: The two second springs (302) are fixed on opposite sides to the opposite sides of the two spheres (303), and the second springs (302) are located outside the second telescopic rod (301).

5. A device for preventing backflow of kitchen exhaust gas according to claim 2, characterized in that: A limiting plate (2028) is fixed to the right side of the fixed plate (2011), and the left side of the limiting plate (2028) is in close contact with the right side of the movable plate (2012).

6. A device for preventing backflow of kitchen exhaust gas according to claim 2, characterized in that: The left side of the connecting rope (2026) is fixed to the right side of the movable plate (2012), and the left end of the connecting column (2027) is fixed to the right side of the fixed plate (2011).

7. The device for preventing backflow of kitchen exhaust gas according to claim 1, characterized in that: The diameter of the movable plate (2025) is equal to the inner diameter of the cylinder (2022), and the left sides of the first spring (2023) and the first telescopic rod (2024) are fixed to the movable plate (2025).

8. A device for preventing backflow of kitchen exhaust gas according to claim 2, characterized in that: The width of the rubber plate (2013) is equal to the inner diameter of the exhaust pipe (1), and the length of the rubber plate (2013) is equal to the length of the movable plate (2012).

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