Device for preventing sewage of range hood from reversely flowing

Abstract

The utility model relates to the technical field of oil smoke discharge, and discloses a device for preventing sewage of a range hood from flowing reversely, the device comprises the range hood and a flue, and the top of the range hood is fixedly connected with a smoke discharge pipe. According to the device for preventing sewage reverse flow of the range hood, by arranging the wave-shaped flow guide plate, the airflow guiding capacity can be enhanced, turbulent flow can be reduced, the wave-shaped design can guide airflow to spirally rise, the smoke exhaust efficiency is improved, and by arranging an electric push rod, when the angle of the wave-shaped flow guide plate needs to be adjusted, the electric push rod operates and can push a connecting plate to move upwards; a linkage rod can be driven to move upwards through limiting of a push rod sliding hole and a sliding hole, then the angle of a wave-shaped flow guide plate can be adjusted through a connecting rod, and therefore people can dynamically adjust the flow guide angle according to the pressure of a public flue conveniently, and meanwhile under the action of an air pressure sensor, the pressure change at the smoke exhaust position of the installation frame can be monitored; and the electric push rod can be triggered to act to prevent backflow.

Description

Technical Field

[0001] This application relates to the field of oil fume emission technology, specifically a device for preventing backflow of wastewater from a range hood. Background Technology

[0002] With the improvement of living standards, range hoods have become widely used. The exhaust pipe of the range hood is connected to the flue backflow preventer, which plays a good role in preventing smoke from spreading in the common exhaust duct of the building.

[0003] An existing patent (publication number: CN215806538U) discloses a flue gas backflow preventer valve, comprising a square frame with a cylindrical exhaust pipe horizontally arranged at the center of the frame. A smoke baffle is provided at the front exhaust port of the exhaust pipe, and the baffle has a backward-recessed arc-shaped guide groove. Several elongated, spaced-apart guide plates are arranged vertically side-by-side at the rear exhaust port. Each guide plate is inclined, with the front lower than the rear, and the gap between adjacent guide plates forms a smoke guiding channel. The beneficial effects of this invention are: the patent's reasonable structural design allows for smooth exhaust gas flow upwards through the common flue, thus preventing backflow of smoke into the house via the flue gas backflow preventer valve, improving exhaust efficiency, and reducing the energy consumption of the range hood.

[0004] While the device in the aforementioned comparative document solves the problem that the flue backflow preventer valve typically opens at the bottom, causing the exhaust airflow to blow downwards into the common flue, easily forming a backflow that severely affects the exhaust effect and increases the energy consumption of the range hood, this device lacks an adjustment structure. The tilt angle of the guide plate is fixed and cannot be dynamically adjusted according to the pressure of the common flue. To solve the above problems, a device for preventing backflow of wastewater from the range hood is proposed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a device for preventing backflow of wastewater from range hoods. This device has advantages such as an adjustable structure and solves the problem that the tilt angle of the guide plate is fixed and cannot be dynamically adjusted according to the pressure of the common flue.

[0006] To achieve the above objectives, this application provides the following technical solution: a device for preventing backflow of sewage from a range hood, comprising a range hood and a flue, wherein a smoke exhaust pipe is fixedly connected to the top of the range hood, a fixed frame is fixedly connected to the output end of the smoke exhaust pipe, an mounting plate is fixedly connected to the side of the fixed frame, and the mounting plate is mounted on the side of the flue.

[0007] The fixed frame has a groove at its bottom, and a mounting frame is slidably connected inside the groove. The mounting frame has a power groove inside, and multiple rotating rods are tightly nested within the power groove via bearings. A wave-shaped guide plate and a connecting rod are fixedly connected to each end of the rotating rod. A crossbar is fixedly connected to the side of the connecting rod. Linkage rods are tightly nested within the surfaces of the multiple crossbars via bearings. An electric push rod is fixedly connected to the bottom of the power groove. A connecting plate is fixedly connected to the top of the electric push rod. Two upright plates are fixedly connected to the top of the connecting plate. The bottom of the linkage rod is located between the two upright plates. A sliding hole is opened on the side of one of the upright plates. A slider is fixedly connected to the side of the linkage rod, and the slider slidably connects to the sliding hole. A wind pressure sensor is fixedly connected to the inside of the mounting frame.

[0008] The above solution enhances airflow guidance and reduces turbulence by setting up a wave-shaped guide plate. The wave-shaped design guides the airflow to spiral upward, improving smoke extraction efficiency. The electric push rod drives the linkage rod, which can rotate the wave-shaped guide plate and automatically control the guide plate angle to adapt to different working conditions. By setting up a wind pressure sensor, the pressure change at the smoke exhaust point of the installation frame can be monitored, which can trigger the electric push rod to prevent backflow.

[0009] Furthermore, triangular blocks are fixedly connected to the bottom of the mounting frame on both opposite sides, and L-shaped plates are fixedly connected to the fixed frame on both opposite sides. Two fixing rods are fixedly connected inside the L-shaped plates, and sliding plates are slidably connected to the surfaces of the fixing rods. A top block is fixedly connected to the side of the sliding plate, and the side of the top block overlaps the side of the triangular blocks.

[0010] The above solution, by setting up triangular blocks and L-shaped plates, and by having the top block contact the inclined surface of the triangular block, can lock the position of the mounting frame, prevent the mounting frame from sliding, and enhance the sealing performance.

[0011] Furthermore, the L-shaped plate is internally threaded with a fastening bolt, and a pressing plate is fixedly connected to the side of the fastening bolt. A limit frame is fixedly connected to the side of the sliding block, and the pressing plate is engaged within the limit frame.

[0012] The above method allows the sliding plate to be tightened by turning the fastening bolts, ensuring continuous pressure from the top block on the triangular block and preventing loosening.

[0013] Furthermore, two fixing blocks are fixedly connected inside the mounting frame. The fixing blocks are tightly nested with rotating shafts on opposite sides via bearings. A plate is fixedly connected to the surface of the rotating shaft.

[0014] The above solution involves setting a fixed block, a rotating shaft, and a plate. The rotating shaft can drive the plate to open and close, forming a one-way valve that allows oil fumes to be discharged but blocks backflow.

[0015] Furthermore, a torsion spring is provided on the surface of the rotating shaft, and the two ends of the torsion spring are respectively fixedly connected to the side of the plate and the inner side of the fixing block.

[0016] The above solution, by setting a torsion spring, can reset the plate to the closed state when there is no external force, which can automatically seal the flue and prevent backflow.

[0017] Furthermore, two arc-shaped baffles are fixedly connected to the inner side of the fixed frame, and the positions of the two arc-shaped baffles are respectively set on the sides of the two rotating shafts and the two fixed blocks.

[0018] The above solution, by setting up an arc-shaped baffle, can cover the gap between the plate and the fixed block, preventing oil stains from seeping into the rotating shaft and extending its service life.

[0019] Furthermore, a first sealing strip is fixedly connected to the bottom of the fixed frame, and a second sealing strip is provided on the surface of the mounting frame.

[0020] The above solution, by setting a first sealing strip and a second sealing strip, can fill the gap between the fixed frame and the mounting frame, prevent oil fume leakage, and improve sealing performance.

[0021] Furthermore, a handle is fixedly connected to the bottom of the mounting frame.

[0022] The above solution, by incorporating a handle, allows users to easily pull out the mounting frame for cleaning.

[0023] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0024] This device prevents backflow of wastewater from a range hood. By incorporating a wave-shaped guide plate, it enhances airflow guidance and reduces turbulence. The wave-shaped design guides the airflow spiral upward, improving exhaust efficiency. An electric push rod is installed; when the angle of the wave-shaped guide plate needs adjustment, the push rod moves, pushing the connecting plate upward. The limit of the push rod's sliding hole causes the linkage rod to move upward, allowing the angle of the wave-shaped guide plate to be adjusted via the connecting rod. This allows for dynamic adjustment of the guide angle based on the pressure of the public flue. Simultaneously, a wind pressure sensor monitors pressure changes at the exhaust point of the mounting frame, triggering the electric push rod to prevent backflow. Attached Figure Description

[0025] Figure 1 This is a frontal three-dimensional structural diagram of this application;

[0026] Figure 2 This is a schematic diagram of the structure in frontal cross-section in this application;

[0027] Figure 3This is a structural schematic diagram of the cross-section of the power channel in this application;

[0028] Figure 4 for Figure 1 Enlarged structural diagram at point A;

[0029] Figure 5 for Figure 3 A structural schematic diagram with an enlarged cross-sectional view at point B;

[0030] Figure 6 for Figure 2 Enlarged structural diagram at point C.

[0031] In the picture:

[0032] 1. Range hood; 101. Exhaust pipe; 102. Fixing frame; 103. Mounting plate; 104. Slide groove; 105. First sealing strip; 106. L-shaped plate; 107. Fixing rod; 108. Slide plate; 109. Top block; 1010. Fastening bolt; 1011. Extrusion plate; 1012. Limiting frame;

[0033] 2. Flue;

[0034] 3. Mounting frame; 301. Handle; 302. Wind pressure sensor; 303. Arc-shaped baffle; 304. Plate body; 305. Second sealing strip; 306. Triangular block; 307. Power groove; 308. Rotating rod; 309. Wave-shaped guide plate; 3010. Connecting rod; 3011. Crossbar; 3012. Linkage rod; 3013. Electric push rod; 3014. Connecting plate; 3015. Vertical plate; 3016. Sliding hole; 3017. Sliding block; 3018. Fixing block; 3019. Rotating shaft; 3020. Torsion spring. Detailed Implementation

[0035] The technical solutions of 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. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] Please see Figure 1 , Figure 3 and Figure 5 The device for preventing backflow of sewage from a range hood 1 in this embodiment includes a range hood 1 and a flue 2. A smoke exhaust pipe 101 is fixedly connected to the top of the range hood 1. A fixed frame 102 is fixedly connected to the output end of the smoke exhaust pipe 101. An installation plate 103 is fixedly connected to the side of the fixed frame 102. The installation plate 103 is installed and connected to the side of the flue 2.

[0037] The bottom of the fixed frame 102 has a sliding groove 104, and the mounting frame 3 is slidably connected inside the sliding groove 104. The mounting frame 3 has a power groove 307 inside, and multiple rotating rods 308 are tightly nested on the inner side of the power groove 307 via bearings. The two ends of the rotating rods 308 are respectively fixedly connected to a wave-shaped guide plate 309 and a connecting rod 3010. The side of the connecting rod 3010 is fixedly connected to a crossbar 3011. The surfaces of the multiple crossbars 3011 are tightly nested with linkage rods 3012 via bearings. The bottom of the power groove 307 is fixedly connected to an electric push rod 3013. The top of the electric push rod 3013 is fixedly connected to a connecting plate 3014. The top of the connecting plate 3014 is fixedly connected to two vertical plates 3015. The bottom of the linkage rod 3012 is located on the two vertical plates 3015. Between 015, a sliding hole 3016 is opened on the side of a vertical plate 3015, and a slider 3017 is fixedly connected to the side of the linkage rod 3012. The slider 3017 is slidably connected in the sliding hole 3016. A wind pressure sensor 302 is fixedly connected to the inside side of the mounting frame 3. By setting a wave-shaped guide plate 309, the airflow guiding ability can be enhanced and turbulence can be reduced. The wave-shaped design can guide the airflow to spiral upward and improve the smoke exhaust efficiency. By driving the linkage rod 3012 through the electric push rod 3013, the wave-shaped guide plate 309 can be rotated. The angle of the guide plate can be automatically controlled to adapt to different working conditions. By setting a wind pressure sensor, the pressure change at the smoke exhaust point of the mounting frame 3 can be monitored, and the electric push rod 3013 can be triggered to prevent backflow.

[0038] Please see Figure 3 and Figure 6 Triangular blocks 306 are fixedly connected to the bottom of the mounting frame 3 on both opposite sides. L-shaped plates 106 are fixedly connected to the opposite sides of the fixing frame 102. Two fixing rods 107 are fixedly connected inside the L-shaped plates 106. A sliding plate 108 is slidably connected to the surface of the fixing rods 107. A top block 109 is fixedly connected to the side of the sliding plate 108. The side of the top block 109 overlaps the side of the triangular blocks 306. By setting up the triangular blocks 306 and L-shaped plates 106, and through the contact between the top block 109 and the inclined surface of the triangular blocks 306, [the following is possible:] The mounting frame 3 is locked in position to prevent it from sliding and enhance sealing. The L-shaped plate 106 is internally threaded with a fastening bolt 1010. A pressing plate 1011 is fixedly connected to the side of the fastening bolt 1010. A limit frame 1012 is fixedly connected to the side of the L-shaped plate 106. The pressing plate 1011 is snapped into the limit frame 1012. By tightening the fastening bolt 1010, the sliding plate 108 can be tightened, which can ensure the continuous pressure of the top block 109 on the triangular block 306 and prevent loosening.

[0039] Please see Figure 3 and Figure 4The mounting frame 3 has two fixed blocks 3018 inside. Each fixed block 3018 has a rotating shaft 3019 tightly nested between its opposite sides via bearings. A plate 304 is fixedly connected to the surface of the rotating shaft 3019. By configuring the fixed blocks 3018, rotating shaft 3019, and plate 304, the rotating shaft 3019 can drive the plate 304 to open and close, forming a one-way valve that allows oil fumes to escape but prevents backflow. A torsion spring 3020 is installed on the surface of the rotating shaft 3019. The two ends of the torsion spring 3020 are fixedly connected to the side of the plate 304 and the inner side of the fixed blocks 3018, respectively. By configuring the torsion spring 3020, the plate 304 can be reset to the closed state without external force, automatically sealing the flue 2 and preventing backflow. Two fixed blocks 3018 are also fixedly connected to the inner side of the mounting frame 102. Two arc-shaped baffles 303 are respectively positioned on the sides of the two rotating shafts 3019 and the two fixing blocks 3018. By setting the arc-shaped baffles 303, the gap between the plate body 304 and the fixing blocks 3018 can be covered, preventing oil stains from seeping into the rotating shafts 3019 and extending their service life. The bottom of the fixing frame 102 is fixedly connected to a first sealing strip 105, and the surface of the mounting frame 3 is provided with a second sealing strip 305. By setting the first sealing strip 105 and the second sealing strip 305, the gap between the fixing frame 102 and the mounting frame 3 can be filled, preventing oil fume leakage and improving sealing performance. The bottom of the mounting frame 3 is fixedly connected to a handle 301, which makes it easy for users to manually pull out the mounting frame 3 for cleaning.

[0040] In this embodiment, by setting the wave-shaped guide plate 309, the airflow guiding ability can be enhanced and turbulence reduced. The wave-shaped design can guide the airflow to spiral upward, improving the smoke exhaust efficiency. By setting the electric push rod 3013, when the angle of the wave-shaped guide plate 309 needs to be adjusted, the electric push rod 3013 operates, which can push the connecting plate 3014 upward. The limit of the push rod sliding hole 3016 can drive the linkage rod 3012 upward. Then, through the connecting rod 3010, the angle of the wave-shaped guide plate 309 can be adjusted, which makes it convenient for people to dynamically adjust the guide angle according to the pressure of the public flue 2. At the same time, under the action of the wind pressure sensor, the pressure change at the smoke exhaust point of the mounting frame 3 can be monitored, which can trigger the action of the electric push rod 3013 to prevent backflow.

[0041] The working principle of the above embodiment is as follows: When the range hood 1 is running, the smoke can blow the plate 304 to rotate around the rotating shaft 3019, so that the plate 304 can be flipped outward. The wave-shaped guide plate 309 is inclined with a lower front and a higher back, with an inclination angle between 40° and 70°, which can make the smoke smoothly discharged from the smoke guide channel into the common smoke duct in the direction of 40°-70° upward.

[0042] When the angle of the wave-shaped guide plate 309 needs to be adjusted, the electric push rod 3013 operates, which can push the connecting plate 3014 upward. The limit of the push rod sliding hole 3016 and the sliding hole 3016 can drive the linkage rod 3012 upward. Then, through the connecting rod 3010, the angle of the wave-shaped guide plate 309 can be adjusted, which makes it convenient for people to dynamically adjust the guide angle according to the pressure of the public flue 2.

[0043] By setting the fastening bolt 1010, people can rotate the fastening bolt 1010 to disengage the extrusion plate 1011 from the limiting frame 1012. After disengagement, people can move the two top blocks 109 to disengage from the triangular block 306. After disengagement, people can pull the handle 301 to pull the mounting frame 3 out from the fixed frame 102. After pulling out, it is convenient for people to repair and replace the structure inside the mounting frame 3.

[0044] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0045] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for preventing backflow of wastewater from a range hood, comprising a range hood (1) and a flue (2), characterized in that: The range hood (1) is fixedly connected to the top of the exhaust pipe (101), and a fixed frame (102) is fixedly connected to the output end of the exhaust pipe (101). An installation plate (103) is fixedly connected to the side of the fixed frame (102), and the installation plate (103) is installed on the side of the flue (2). The bottom of the fixed frame (102) is provided with a sliding groove (104), and a mounting frame (3) is slidably connected inside the sliding groove (104). The mounting frame (3) is provided with a power groove (307). Multiple rotating rods (308) are tightly nested inside the power groove (307) via bearings. A wave-shaped guide plate (309) and a connecting rod (3010) are respectively fixedly connected to both ends of the rotating rod (308). A crossbar (3011) is fixedly connected to the side of the connecting rod (3010). A linkage rod (3012) is tightly nested on the surface of the multiple crossbars (3011) via bearings. The power groove (307) An electric push rod (3013) is fixedly connected to the bottom of the interior. A connecting plate (3014) is fixedly connected to the top of the electric push rod (3013). Two upright plates (3015) are fixedly connected to the top of the connecting plate (3014). The bottom of the linkage rod (3012) is located between the two upright plates (3015). A sliding hole (3016) is opened on the side of one of the upright plates (3015). A slider (3017) is fixedly connected to the side of the linkage rod (3012). The slider (3017) is slidably connected in the sliding hole (3016). A wind pressure sensor (302) is fixedly connected to the inner side of the mounting frame (3).

2. The device for preventing backflow of wastewater from a range hood according to claim 1, characterized in that: The mounting frame (3) has triangular blocks (306) fixedly connected to both sides of its bottom. The fixed frame (102) has L-shaped plates (106) fixedly connected to both sides of its bottom. The L-shaped plates (106) have two fixed rods (107) fixedly connected inside. The fixed rods (107) have sliding plates (108) slidably connected to their surfaces. The sliding plates (108) have top blocks (109) fixedly connected to their sides. The top blocks (109) overlap the sides of the triangular blocks (306).

3. The device for preventing backflow of wastewater from a range hood according to claim 2, characterized in that: The L-shaped plate (106) is internally threaded with a fastening bolt (1010), and a pressing plate (1011) is fixedly connected to the side of the fastening bolt (1010). A limiting frame (1012) is fixedly connected to the side of the L-shaped plate (106), and the pressing plate (1011) is snapped into the limiting frame (1012).

4. The device for preventing backflow of wastewater from a range hood according to claim 1, characterized in that: The mounting frame (3) has two fixed blocks (3018) inside. The fixed blocks (3018) are tightly nested with rotating shafts (3019) on opposite sides by bearings. The rotating shafts (3019) have plates (304) fixedly connected to their surfaces.

5. The device for preventing backflow of wastewater from a range hood according to claim 4, characterized in that: The rotating shaft (3019) is provided with a torsion spring (3020), and the two ends of the torsion spring (3020) are respectively fixedly connected to the side of the plate (304) and the inside side of the fixing block (3018).

6. The device for preventing backflow of wastewater from a range hood according to claim 4, characterized in that: The fixed frame (102) has two arc-shaped baffles (303) fixedly connected to its inner side. The two arc-shaped baffles (303) are respectively located on the sides of the two rotating shafts (3019) and the two fixed blocks (3018).

7. The device for preventing backflow of wastewater from a range hood according to claim 1, characterized in that: The bottom of the fixed frame (102) is fixedly connected with a first sealing strip (105), and the surface of the mounting frame (3) is provided with a second sealing strip (305).

8. The device for preventing backflow of wastewater from a range hood according to claim 1, characterized in that: The bottom of the mounting frame (3) is fixedly connected to a handle (301).

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