Kitchen fume exhaust fume branch pipe assembly and high-rise building public flue layout using same

Abstract

The kitchen smoke exhaust branch smoke pipe assembly comprises a universal air outlet cover, a smoke exhaust air pipe and a universal non-return valve. The universal air outlet cover comprises a cover body base and an adapter ring. The cover body base is arranged at the air outlet of the smoke exhaust machine. The adapter ring is connected with the smoke exhaust air pipe and is rotatably connected to the cover body base. The angle between the axis of the adapter ring and the axis of the cover body base changes with the rotation of the adapter ring. The universal non-return valve comprises a valve body base and first and second stop rings rotatably connected to the two ends of the valve body base respectively. The first stop ring is connected with the smoke exhaust air pipe. The second stop ring extends into the public flue. The angle between the axis of the first stop ring and the axis of the valve body base changes with the rotation of the first stop ring. The angle between the axis of the second stop ring and the axis of the valve body base changes with the rotation of the second stop ring. The kitchen smoke exhaust branch smoke pipe assembly has the advantages of high flexibility, strong scene adaptability, convenient and fast adjustment, no disturbance to the smoke exhaust of the lower users of the building, few aerodynamic adverse factors, high smoke exhaust efficiency and less oil dirt accumulation.

Description

Technical Field

[0001] This utility model relates to a kitchen exhaust pipe assembly and a layout of a public exhaust duct in a high-rise building using the same. Background Technology

[0002] In the layout of kitchen exhaust systems in high-rise buildings, the common exhaust duct generally adopts a combined exhaust method with the rooftop non-powered vent cap, ultimately venting the fumes entering the common exhaust duct from the kitchen into the atmosphere. The branch exhaust pipes from the kitchen range hood to the common exhaust duct mostly use a straight exhaust method with bends (the range hood outlet connected to the exhaust hood often only supports upward exhaust, and then connects horizontally to the common exhaust duct via an exhaust pipe; therefore, a 90° right-angle bend is formed between the exhaust hood outlet and the check valve inlet). This design of the branch exhaust pipes... Designs often overlook key factors related to aerodynamics that lead to excessive airflow pressure loss. For example, bent side flues can easily generate undesirable eddies, affecting exhaust efficiency and increasing noise. The increased flow path of the oil fume along the wall also affects flow velocity, leading to oil buildup. In particular, it is easier to overlook that oil fumes have a higher temperature and greater specific gravity than the surrounding air, causing the side flue to deviate significantly from the optimal exhaust path. Therefore, many aerodynamically unfavorable factors in existing designs have a significant impact on the exhaust efficiency of oil fumes.

[0003] For example, Chinese utility model application CN107842893A, entitled "A Range Hood," discloses a range hood comprising: a range hood body (1), a lifting device (2), a wall (3), a control panel (4), a longitudinal inner pipe (5), a transverse inner pipe (6), a longitudinal outer pipe (7), a transverse outer pipe (8), a check valve (9), a fan (10), a ventilation pipe (11), a vent (12), and an air blowing pipe (13). The side wall of the range hood body (1) is fixedly mounted on the side of the wall (3) via the lifting device (2). The control panel (4) is located on the front of the range hood body (1). The upper end of the range hood body (1) is connected to one end of the transverse inner pipe (6) via the longitudinal inner pipe (5), and the other end of the transverse inner pipe (6) passes through the wall. The wall (3) extends to the outside of the wall (3), and the other end of the transverse inner pipe (6) is located above the lifting device (2). The longitudinal inner pipe (5) is fitted with the longitudinal outer pipe (7), and the transverse inner pipe (6) is fitted with the transverse outer pipe (8). The longitudinal outer pipe (7) and the transverse outer pipe (8) are sealed together. The lower end of the transverse inner pipe (6) is provided with the check valve (9). The longitudinal outer pipe (7) is located on one side and inside the range hood body (1) and connected to the fan (10) through the ventilation pipe (11). The side wall of the range hood body (1) is provided with several ventilation openings (12). The walls of the longitudinal inner pipe (5) and the transverse inner pipe (6) are evenly provided with several air blowing pipes (13) along the airflow direction.The lifting device (2) includes a fixed plate (33), a movable plate (14), a slide groove (15), a rack (16), a gear (17), a drive shaft (18), a motor (19), a first fixed rod (20), a second fixed rod (21), a first shaft (22), a first connecting rod (23), a shaft (24), a second connecting rod (25), and a third shaft (26). The fixed plate (33) has slide grooves (15) on both sides. The movable plate (14) engages with the slide grooves (15) on both sides via the rack (16). The rack (16) is fixedly connected to one end of the drive shaft (18) via the gear (17). The other end of the drive shaft (18)... One end is fixedly connected to the output shaft of the motor (19). The fixing rod 1 (20) is horizontally arranged in the middle of one side of the fixing plate (33). The fixing rod 2 (21) is horizontally arranged at the bottom of one side of the movable plate (14). The fixing rod 1 (20) and the fixing rod 2 (21) are located on the same side. The fixing rod 1 (20) has a rotating shaft 1 (22) at both ends. The fixing rod 2 (21) has a rotating shaft 3 (26) at both ends. The rotating shaft 1 (22) is movably connected to the rotating shaft 2 (24) through the connecting rod 1 (23). The rotating shaft 2 (24) is movably connected to the rotating shaft 3 (26) through the connecting rod 2 (25). The technical solution described in this utility model application employs a branch pipe structure with longitudinal inner pipe (5) and transverse inner pipe (6) to discharge oil fumes into a public flue. This structure obviously has many aerodynamic disadvantages, thus severely affecting the smoke extraction effect, leading to excessive oil accumulation that easily causes fire risks and is difficult to clean.

[0004] For example, Chinese Utility Model Application CN103123136A, entitled "A Kitchen Fume Emission System," discloses a system including a range hood, a check valve, an exhaust pipe, and a common flue. The exhaust pipe is directly and sealed to the common flue. The check valve includes a riser with a circular valve plate inside. The valve plate is rotatably supported on the riser wall via a horizontal axis that radially penetrates it. A stop point is provided on the riser wall. When the valve plate is in a flat position, its edge presses down on the stop point. A weight-adding piece is fixed on the valve plate above and near the stop point. The upper and lower ends of the riser are respectively connected to the lower end of the exhaust pipe and the air outlet of the range hood. This invention discloses that the exhaust pipe includes a riser, and implicitly discloses that the exhaust pipe also includes a horizontal pipe to discharge fumes into the common flue. Therefore, it also suffers from the aforementioned aerodynamic disadvantages, which severely affect the exhaust effect, leading to excessive grease accumulation, increasing the risk of fire, and making cleaning difficult.

[0005] Therefore, there is an urgent need to develop a kitchen exhaust branch pipe assembly that can adapt to various usage scenarios and quickly and conveniently provide the optimal smoke exhaust path. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model discloses a kitchen exhaust branch pipe assembly that is highly flexible, adaptable to various scenarios, easy and quick to adjust, does not cause turbulence to the exhaust of users on lower floors, has few adverse aerodynamic factors, has high exhaust efficiency and good effect, and is not prone to accumulating oil stains, as well as the layout of the public exhaust duct in high-rise buildings using it.

[0007] The main technical solution adopted by this utility model is as follows:

[0008] A kitchen exhaust pipe assembly includes a universal exhaust hood, an exhaust duct, and a universal check valve. The universal exhaust hood includes a hood base and a transition ring. The hood base is located at the exhaust outlet of the range hood. The transition ring is connected to the exhaust duct and is rotatably connected to the hood base. The angle between the axis of the transition ring and the axis of the hood base changes as the transition ring rotates. The universal check valve includes a valve base and a first retaining ring and a second retaining ring rotatably connected to the openings at both ends of the valve base. The first retaining ring is connected to the exhaust duct, and the second retaining ring extends into the common flue. The angle between the axis of the first retaining ring and the axis of the valve base changes as the first retaining ring rotates, and the angle between the axis of the second retaining ring and the axis of the valve base changes as the second retaining ring rotates.

[0009] The adapter ring, the exhaust duct, and the first baffle ring extend upwards at an angle along a straight line.

[0010] The adapter ring also has an oil receiving groove near its top edge, and the oil receiving groove includes an L-shaped ring.

[0011] The adapter ring has a rectangular cross-section at its bottom edge, and the cover base also has a rectangular cross-section at its top edge. The adapter ring is pivotally connected to the cover base. The outer edge of the bottom edge of the adapter ring has an outwardly extending outer edge, which includes a pivot section and a snap-fit ​​section. The pivot section cooperates with the inner side of the top edge of the cover base, and the snap-fit ​​section is movably snapped onto the inner sidewall of the cover base.

[0012] The pivot section is located on the outer edge of the bottom edge of the adapter ring. Pivots protrude from both ends of the pivot section. A pivot hole and a sliding groove are formed on the inner side of the top edge of the cover base. The pivot slides into the pivot hole through the sliding groove.

[0013] The pivot section rotates along its length, closely attached to the inner side of the top edge of the base of the cover.

[0014] The outer edge also includes a connecting section, and the wind deflector is rotatably connected to the connecting section. The base of the cover also has a clearance notch on the side wall corresponding to the wind deflector.

[0015] The wind deflector is provided with limiting protrusions on both sides of its bottom end, and a limiting track is formed on the inner side wall of the cover base, with the limiting protrusions installed in the limiting track.

[0016] The bottom edge of the transition ring is also equipped with a guide vane, which is parallel to the axis of the transition ring and intersects the rotation direction of the transition ring.

[0017] The first retaining ring and the second retaining ring are connected by a linkage rod. When the first retaining ring / the second retaining ring rotates relative to the valve body base, it also drives the second retaining ring / the first retaining ring to rotate relative to the valve body base.

[0018] The first retaining ring and the second retaining ring each have a connecting protrusion formed on their inner sidewalls. A connecting beam is formed in the middle of the connecting protrusion, and both ends of the linkage rod are rotatably connected to the connecting beam.

[0019] Wherein, the outer diameter of the first retaining ring and the second retaining ring is not greater than the inner diameter of the valve body base, and at least part of the connecting rod is located inside the valve body base.

[0020] The valve body base has a through hole near at least one end opening, and the second retaining ring and / or the second retaining ring has a mating hole, with the pin passing through the through hole and the mating hole.

[0021] The valve body base has a lug extending outward along the axial direction of the valve body base at at least one end opening. The lug has a through hole, and the first retaining ring and / or the second retaining ring has a mating hole. The pin passes through the through hole and the mating hole.

[0022] The through hole is formed at the top of the lug, and the mating hole is formed at the bottom of the first retaining ring and / or the second retaining ring. The first retaining ring and / or the second retaining ring form a rotational clearance with at least one end opening of the valve body base through the lug.

[0023] The valve body base has a mounting flange extending outward in the radial direction of the valve body base at one end opening near the first retaining ring. The mounting flange has a mounting hole, and the exhaust duct is installed to the mounting flange through the mounting hole.

[0024] The layout of public smoke ducts in high-rise buildings uses the aforementioned kitchen exhaust branch pipe assembly.

[0025] According to the technical solution described in this utility model, the following beneficial effects are achieved: the included angle between the axis of the universal exhaust hood's adapter ring and the axis of the hood base changes with the rotation of the adapter ring. This allows the exhaust hood's structure to be modified to adapt to confined installation spaces by adjusting the angle between the hood base and the adapter ring. Furthermore, adjusting the angle between the hood base and the adapter ring allows the exhaust hood to be adjusted to a pneumatically advantageous turning angle, which is more conducive to the discharge of fumes, improves exhaust efficiency, and reduces oil accumulation; the axis of the first retaining ring of the universal check valve... The angle between the axis of the line and the axis of the valve body base changes with the rotation of the first retaining ring, and the angle between the axis of the second retaining ring and the axis of the valve body base changes with the rotation of the second retaining ring. This allows for adjustment of the flow direction of the oil fume before and after entering the common flue. This facilitates flexible adjustment of the bends or turns in the exhaust duct based on the distance between the range hood's installation height and the opening of the common flue, thus creating a pneumatically advantageous exhaust duct, reducing oil accumulation, and promoting efficient exhaust of oil fumes. Setting the adapter ring, exhaust duct, and first retaining ring to extend upwards at an angle along a straight line allows for the optimal exhaust path of the branch duct based on the high temperature and high specific gravity of the oil fumes, promoting efficient exhaust of oil fumes. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the universal air outlet cover when the adapter ring is in the initial rotational state relative to the base of the cover.

[0027] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure shown in Figure XX.

[0028] Figure 3 This is a schematic diagram of the structure of the universal air outlet cover when the adapter ring is in the middle of its rotation relative to the base of the cover.

[0029] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure shown in the middle YY diagram.

[0030] Figure 5 This is a schematic diagram of the universal air outlet cover when the adapter ring is in the terminated rotation state relative to the base of the cover.

[0031] Figure 6 for Figure 5 The cross-sectional structure shown in Figure ZZ is a schematic diagram.

[0032] Figure 7 This is a schematic diagram of the exploded structure of the omnidirectional air outlet cover.

[0033] Figure 8 This is a schematic diagram of a universal check valve.

[0034] Figure 9 for Figure 8 Schematic diagram of the side structure of the universal check valve.

[0035] Figure 10 This is a schematic diagram of the disassembled structure of a universal check valve.

[0036] Figure 11 This document describes the layout of kitchen exhaust duct assemblies and public flue systems in high-rise buildings, utilizing universal exhaust hoods, exhaust ducts, and universal check valves.

[0037] Figure 12 The diagram shows the exhaust air volume, velocity cloud map, and pressure cloud map corresponding to the smoke exhaust duct of the building shown in Scheme 1.

[0038] Figure 13 The diagram shows the exhaust air volume, velocity cloud map, and pressure cloud map corresponding to the smoke exhaust duct of the building shown in Scheme 2.

[0039] Figure 14 The diagram shows the exhaust air volume, velocity cloud map, and pressure cloud map corresponding to the smoke exhaust duct of the building shown in Scheme 3.

[0040] Figure 15 The diagram shows the exhaust air volume, velocity cloud map, and pressure cloud map corresponding to the smoke exhaust duct of the building shown in Scheme 4.

[0041] Figure 16 The diagram shows the exhaust air volume, velocity cloud map, and pressure cloud map corresponding to the smoke exhaust duct of the building shown in Scheme 5.

[0042] 1. Universal exhaust hood, 11. Hood base, 110. Clearance notch, 12. Adapter ring, 120. Oil collection groove, 121. Outer edge, 1211. Pivot section, 1212. Clip section, 1213. Connecting section, 2. Smoke exhaust duct, A. Pivot, B. Pivot hole, C. Slide groove, T. Baffle plate, M. Limiting convex, N. Limiting rail, K. Air guide plate, 3. Universal check valve, 31. Valve body base, 310. Through hole, 311. Lug, 312. Mounting flange, 32. First retaining ring, 33. Second retaining ring, 4. Connecting rod, 5. Connecting convex, 51. Connecting beam, Q. Mating hole, H. Rotation clearance. Detailed Implementation

[0043] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0044] See Figure 1-11As shown, the kitchen exhaust pipe assembly includes a universal exhaust hood 1, an exhaust duct 2, and a universal check valve 3. The universal exhaust hood 1 includes a hood base 11 and a transition ring 12. The hood base 11 is located at the exhaust outlet of the range hood, and the transition ring 12 is connected to the exhaust duct 2. The transition ring 12 is rotatably connected to the hood base 11, and the angle between the axis of the transition ring 12 and the axis of the hood base 11 changes as the transition ring 12 rotates. The universal check valve 3 includes... The system includes a valve body base 31 and a first retaining ring 32 and a second retaining ring 33 rotatably connected to the openings at both ends of the valve body base 31. The first retaining ring 32 is connected to the exhaust duct 2, and the second retaining ring 33 extends into the common flue. The angle between the axis of the first retaining ring 32 and the axis of the valve body base 31 changes with the rotation of the first retaining ring 32, and the angle between the axis of the second retaining ring 33 and the axis of the valve body base 31 changes with the rotation of the second retaining ring 33. In this application, the angle between the axis of the adapter ring of the universal exhaust hood and the axis of the hood base changes with the rotation of the adapter ring. By adjusting the angle between the hood base and the adapter ring, the structure of the exhaust hood can be changed to adapt to a narrow installation space. Moreover, by adjusting the angle between the hood base and the adapter ring, the exhaust hood can be adjusted to have a pneumatically advantageous turning angle, which is more conducive to the exhaust of oil fumes, improves exhaust efficiency, reduces the amount of oil accumulation, and can prevent the risk of fire. In this application, the angle between the axis of the first retaining ring and the axis of the valve body base of the universal check valve changes with the rotation of the first retaining ring, and the angle between the axis of the second retaining ring and the axis of the valve body base changes with the rotation of the second retaining ring. The flow direction of the oil fume before and after entering the common flue can be adjusted. This allows for flexible adjustment of the bend or turn angle of the exhaust channel based on the distance between the range hood installation height and the opening of the common flue, thereby forming a pneumatically advantageous exhaust channel, reducing the accumulation of oil stains, facilitating cleaning, and promoting efficient exhaust of oil fumes. Preferably, the valve body base 31 of the universal check valve 3 is also provided with a check valve plate to prevent the backflow and reverse flow of oil fumes and odors in the common flue.

[0045] See Figure 11As shown, the adapter ring 12, the smoke exhaust duct 2, and the first baffle ring 32 extend upwards at an angle along a straight line. In this application, the slight downward sag of the smoke exhaust duct due to gravity, deviating from the straight line, is also within the scope of protection of this application. In this application, the optimal smoke exhaust path of the branch smoke pipe can be set according to the characteristics of high temperature and high specific gravity of the oil fume. For example, considering that the specific gravity of oil fume is relatively large, the oil fume airflow may lack power when it is inclined upward. Therefore, the inclination angle of the transition ring, the smoke exhaust duct and the first baffle ring along the straight direction is set between 40 and 45° to exhaust oil fume more efficiently, without affecting the smoke exhaust of users on the lower floor and without affecting the smoke exhaust of the upper floor if items fall. In addition, in order to further reduce the space occupation, on the basis of providing the optimal smoke exhaust path, the inclination angle of the transition ring 12, the smoke exhaust duct 2 and the first baffle ring 32 along the straight direction is preferably set at about 43°. In this application, the airflow vortex can be effectively eliminated before and after the oil fume airflow enters the public smoke duct, resulting in high smoke exhaust efficiency. More preferably, a detachable buckle can be used to lock the angle of the transition ring of the universal exhaust hood and / or the first baffle ring of the universal check valve. In addition, taking a 30-story building, a public flue cross-section of 400*800mm, a branch flue diameter of approximately 180mm, and a range hood operating rate of no more than 70% as an example, according to Figure 12-16 Based on the exhaust air volume shown and the velocity and pressure cloud maps shown in the CFD simulation test (the calculation domain covers the range hood outlet, branch flues, public flues, and hoods, etc.), combined with the content of Table 1 below, the following conclusions can be drawn: The branch flue assembly with the transition ring, exhaust duct, and first baffle ring extending upwards in a straight line, as well as the layout of the public flue in high-rise buildings, has a significantly better exhaust effect, and there is no turbulence or splashing phenomenon in the exhaust of low-rise buildings below 10 floors.

[0046] Table 1. Kitchen Exhaust Pipe Assembly and Layout Scheme for Public Smoke Ducts in High-Rise Buildings (I-V)

[0047]

[0048] See Figure 1-7 As shown, the adapter ring 12 also has an oil collecting groove 120 near its top edge, and the oil collecting groove 120 includes an L-shaped ring. In this application, this structural design can better receive and collect oil stains from the upwardly extending exhaust duct, avoiding them from flowing to other places such as the outer wall of the universal exhaust hood, thus avoiding additional cleaning burdens for the user.

[0049] See Figure 1-7As shown, the adapter ring 12 has a rectangular cross-section at its bottom edge, and the cover base 11 also has a rectangular cross-section at its top edge. The adapter ring 12 is pivotally connected to the cover base 11. An outwardly extending outer edge 121 is formed on the outer side of the bottom edge of the adapter ring 12. The outer edge 121 includes a pivot section 1211 and a snap-fit ​​section 1212. The pivot section 1211 cooperates with the inner side of the top edge of the cover base 11, and the snap-fit ​​section 1212 is movably snapped onto the inner sidewall of the cover base 11. In this application, the adapter ring has a rectangular cross-section at its bottom edge, and the cover base also has a rectangular cross-section at its top edge. The two cooperate with each other to adjust the turning angle of the air outlet cover. This structural design also simplifies the manufacturing difficulty of the parts, facilitates mass production, and improves production efficiency. In this application, the bottom edge of the adapter ring forms an outer edge. A pivot section within this outer edge is pivotally connected to the base of the cover, and a snap-fit ​​section within the outer edge is movably snapped onto the inner wall of the base. This design is simple, has low manufacturing difficulty, and is easy to produce. In this application, the adapter ring is pivotally connected to the base, allowing it to rotate in one dimension relative to the base. To adapt to different installation scenarios, rotation in another dimension can be achieved by adjusting the installation direction of the base and the range hood's air outlet, thus achieving true "omnidirectional" capability. In this application, the pivot section can be located on the outer edge of one side of the adapter ring's bottom edge, or it can be located at the middle of the outer edges of the two symmetrical bottom edges of the adapter ring (in this embodiment, a seesaw-like structural design is presented, and the length of the pivot section is very short). Preferably, when the pivot section 1211 is located on the outer edge 121 of the bottom edge of the adapter ring 12, an inner edge extending inward for a certain length can also be formed along the inner side of the top edge of the cover base 11. In order to improve the firmness of the connection between the pivot section 1211 and the inner edge, the pivot section 1211 and the inner edge can be connected to each other in a segmented manner.

[0050] See Figure 1-7 As shown, the pivot section 1211 is located on the outer edge 121 of the bottom edge of the adapter ring 12. Pivot A is protruded at both ends of the pivot section 1211. Pivot hole B and slide groove C are formed on the inner side of the top edge of the cover base 11. Pivot A slides into pivot hole B through slide groove C.

[0051] See Figure 1-7 As shown, the pivot section 1211 rotates along its length, closely attached to the inner side of the top edge of the cover base 11. In this application, to minimize the gap between the adapter ring and the cover base, the pivot section rotates along its length, closely attached to the inner side of the top edge of the cover base, to prevent oil fumes from leaking out of the gap and reducing the smoke extraction effect.

[0052] See Figure 1-7As shown, the outer edge 121 also includes a connecting section 1213, and the baffle plate T is rotatably connected to the connecting section 1213. The hood base 11 also has a clearance notch 110 formed on the side wall corresponding to the baffle plate T. In this application, by providing the clearance notch, more space can be provided for the rotation of the transition ring, thereby achieving a larger adjustment of the turning angle between the transition ring and the hood base, improving the scene adaptability of the air outlet hood. In this application, preferably, to improve the firmness of the connection between the baffle plate T and the connecting section 1213, the baffle plate T and the connecting section 1213 can also be connected in a segmented manner. In this application, the clearance notch is covered by the baffle plate, thereby preventing oil fumes from leaking out from the clearance notch, and improving the smoke extraction effect.

[0053] See Figure 2 , 4 As shown in Figures 6 and 7, limiting protrusions M are also provided on both sides of the bottom end of the wind deflector T, and a limiting track N is formed on the inner side wall of the cover base 11, with the limiting protrusions M installed in the limiting track N. In this application, in order to prevent the wind deflector from moving freely under the action of gravity due to the rotation of the adapter ring and thus failing to cover the clearance gap, a limiting track can be opened on the inner side wall of the cover base. This prevents the wind deflector from failing to cover the clearance gap when moving freely, thus preventing oil fumes from leaking out. The setting of the limiting track provides structural protection for the wind deflector to effectively cover the clearance gap.

[0054] See Figure 1-7 As shown, a guide vane K is also installed on the inner side of the bottom edge of the transition ring 12. The guide vane K is parallel to the axis of the transition ring 12 and intersects the rotation direction of the transition ring 12. In this application, the guide vane can move synchronously with the rotation of the transition ring, thereby diverting the oil fume airflow, reducing the undesirable turbulence caused by the collision and accumulation of a large amount of airflow, and improving the smoke exhaust efficiency. In this application, it is not excluded that the guide vane and the axis of the transition ring are at a certain angle.

[0055] See Figure 8-10 As shown, the first retaining ring 32 and the second retaining ring 33 are connected by a connecting rod 4. When the first retaining ring 32 / 2 retaining ring 33 rotates relative to the valve body base 31, it also drives the second retaining ring 33 / 1 retaining ring 32 to rotate relative to the valve body base 31. In this application, the connecting rod allows the adjustment of the first and second retaining rings to be performed synchronously. Even if the second retaining ring extends into the common flue, the rotation angle of the second retaining ring can still be adjusted by the connecting rod. The adjustment process is simple and easy to operate.

[0056] See Figure 8-10As shown, connecting protrusions 5 are formed on the inner walls of the first retaining ring 32 and the second retaining ring 33, respectively. A connecting beam 51 is formed in the middle of the connecting protrusion 5, and both ends of the linkage rod 4 are rotatably connected to the connecting beam 51. In this application, both ends of the linkage rod are connected to the first retaining ring and the second retaining ring through the connecting beam on the connecting protrusion, respectively. The structure is simple, the manufacturing process is simple, and it is conducive to mass production. In this application, this structural design hides the connecting protrusion on the inner walls of the first retaining ring and the second retaining ring, making the appearance more beautiful and neat. Moreover, hiding the connecting protrusion on the inner walls of the first retaining ring and the second retaining ring makes it easier and faster to install the check valve at the opening of the common flue without being obstructed by the connecting protrusion.

[0057] See Figure 8-10 As shown, the outer diameter of the first retaining ring 32 and the second retaining ring 33 is not greater than the inner diameter of the valve body base 31, and at least part of the connecting rod 4 is located inside the valve body base 31. In this application, this structural design can effectively improve the overall aesthetics and neatness of the check valve product, and also avoid the obstruction of the connecting rod when installing the check valve at the opening of the public flue, making operation more convenient and quick.

[0058] See Figure 8-10 As shown, the valve body base 31 has a through hole 310 near at least one end opening, and a mating hole Q is formed on the first retaining ring 32 and / or the second retaining ring 33. The pin passes through the through hole 310 and the mating hole Q. In this application, preferably, the through holes 310 are symmetrically formed on the valve body base 31. To improve the sensitivity of the rotation of the first retaining ring 32 and / or the second retaining ring 33, the end of the linkage 4 is located at the farthest point from the line connecting the two through holes. More preferably, the valve body base 31 is a through cylindrical shape (in some other embodiments, the valve body base 31 may also be a through square cylindrical shape).

[0059] See Figure 8-10 As shown, the valve body base 31 also has a lug 311 extending outward along the axial direction of the valve body base 31 at at least one end opening. A through hole 310 is formed on the lug 311, and a mating hole Q is formed on the first retaining ring 32 and / or the second retaining ring 33. A pin passes through the through hole 310 and the mating hole Q. In this application, preferably, the through holes 310 are symmetrically formed on the lugs 311. To improve the sensitivity of the rotation of the first retaining ring 32 and / or the second retaining ring 33, the end of the linkage 4 is located at the furthest point from the line connecting the through holes of the two lugs 311. More preferably, the valve body base 31 is a through-through cylindrical shape (in some other embodiments, the valve body base 31 may also be a through-through square cylindrical shape).

[0060] See Figure 8-10As shown, a through hole 310 is formed at the top of the lug 311, and a matching hole Q is formed at the bottom of the first retaining ring 32 and / or the second retaining ring 33. The first retaining ring 32 and / or the second retaining ring 33 form a rotational clearance H between themselves and at least one end opening of the valve body base 31 through the lug 311. In this application, this structural design provides the necessary conditions for forming a rotational clearance between the first retaining ring and / or the second retaining ring and the valve body base, thereby providing a larger space for the rotation of the first retaining ring and / or the second retaining ring, a wider angle adjustment range, and is more conducive to forming a pneumatically advantageous smoke exhaust channel.

[0061] See Figure 8-10 As shown, the valve body base 31 has a mounting flange 312 extending radially outward from the opening near the end corresponding to the first retaining ring 32. The mounting flange 312 has mounting holes, through which the exhaust duct 2 is installed onto the mounting flange 312. In practical applications, the end of the exhaust duct connected to the check valve is usually higher than the end connected to the range hood or exhaust hood. Therefore, the end of the exhaust duct connected to the check valve needs to overcome gravity. To improve the connection strength between the exhaust duct and the check valve, a mounting flange is formed on the valve body base of the check valve to achieve a stable connection with the exhaust duct.

[0062] See Figure 11 As shown, the layout of the public flue in high-rise buildings uses the aforementioned kitchen exhaust branch pipe assembly.

[0063] Although the specific embodiments of this utility model have been described above, those skilled in the art can make changes to it without departing from the spirit and principle of this utility model. The scope of protection of this utility model is defined by its claims and their equivalents.

Claims

1. A kitchen exhaust pipe assembly, characterized in that: It includes a universal exhaust hood, a smoke exhaust duct, and a universal check valve; the universal exhaust hood includes a hood base and a connecting ring, the hood base is located at the air outlet of the range hood, the connecting ring is connected to the smoke exhaust duct, the connecting ring is rotatably connected to the hood base, and the angle between the axis of the connecting ring and the axis of the hood base changes as the connecting ring rotates; The universal check valve includes a valve body base and a first retaining ring and a second retaining ring rotatably connected to the openings at both ends of the valve body base. The first retaining ring is connected to the exhaust duct, and the second retaining ring extends into the common flue. The angle between the axis of the first retaining ring and the axis of the valve body base changes with the rotation of the first retaining ring, and the angle between the axis of the second retaining ring and the axis of the valve body base changes with the rotation of the second retaining ring.

2. The kitchen exhaust pipe assembly according to claim 1, characterized in that: The adapter ring, the exhaust duct, and the first baffle ring extend upwards at an angle along a straight line.

3. The kitchen exhaust pipe assembly according to claim 1 or 2, characterized in that: The adapter ring also has an oil receiving groove near its top edge, and the oil receiving groove includes an L-shaped ring.

4. The kitchen exhaust pipe assembly according to claim 1 or 2, characterized in that: The adapter ring has a rectangular cross-section at its bottom edge, and the cover base also has a rectangular cross-section at its top edge. The adapter ring is pivotally connected to the cover base. The outer edge of the bottom edge of the adapter ring has an outwardly extending outer edge, which includes a pivot section and a snap-fit ​​section. The pivot section cooperates with the inner side of the top edge of the cover base, and the snap-fit ​​section is movably snapped onto the inner sidewall of the cover base.

5. The kitchen exhaust pipe assembly according to claim 4, characterized in that: The pivot section is located on the outer edge of the bottom edge of the adapter ring. Pivots protrude from both ends of the pivot section. A pivot hole and a groove are formed on the inner side of the top edge of the cover base. The pivot slides into the pivot hole through the groove.

6. The kitchen exhaust pipe assembly according to claim 5, characterized in that: The pivot section rotates along its length, closely attached to the inner side of the top edge of the base of the cover.

7. The kitchen exhaust pipe assembly according to claim 4, characterized in that: The outer edge also includes a connecting section, to which the wind deflector is rotatably connected, and the base of the cover also has a clearance notch formed on the side wall corresponding to the wind deflector.

8. The kitchen exhaust pipe assembly according to claim 7, characterized in that: The bottom of the wind deflector is provided with limiting protrusions on both sides, and a limiting track is formed on the inner side wall of the cover base, with the limiting protrusions installed in the limiting track.

9. The kitchen exhaust pipe assembly according to any one of claims 1, 2, 5 to 8, characterized in that: The inner side of the bottom edge of the adapter ring is also equipped with an air guide plate, which is parallel to the axis of the adapter ring and intersects the rotation direction of the adapter ring.

10. The kitchen exhaust pipe assembly according to any one of claims 1, 2, 5 to 8, characterized in that; The first retaining ring and the second retaining ring are also connected by a linkage rod. When the first retaining ring / the second retaining ring rotates relative to the valve body base, it also drives the second retaining ring / the first retaining ring to rotate relative to the valve body base.

11. The kitchen exhaust pipe assembly according to claim 10, characterized in that; Connecting protrusions are formed on the inner sidewalls of the first retaining ring and the second retaining ring, and a connecting beam is formed in the middle of the connecting protrusion. The two ends of the linkage rod are rotatably connected to the connecting beam.

12. The kitchen exhaust pipe assembly according to claim 11, characterized in that; The outer diameters of the first retaining ring and the second retaining ring are not greater than the inner diameter of the valve body base, and at least part of the connecting rod is located inside the valve body base.

13. The kitchen exhaust pipe assembly according to any one of claims 1, 2, 5 to 8, 10, 11, characterized in that; The valve body base is provided with a through hole near at least one of its openings, and the first retaining ring and / or the second retaining ring are provided with mating holes, with the pin passing through the through hole and the mating hole.

14. The kitchen exhaust pipe assembly according to any one of claims 1, 2, 5 to 8, 10, 11, characterized in that; The valve body base also has a lug extending outward along the axial direction of the valve body base at at least one end opening. The lug has a through hole, and the first retaining ring and / or the second retaining ring has a mating hole. The pin passes through the through hole and the mating hole.

15. The kitchen exhaust pipe assembly according to claim 14, characterized in that; The through hole is formed at the top of the lug, and the mating hole is formed at the bottom of the first retaining ring and / or the second retaining ring. The first retaining ring and / or the second retaining ring form a rotational clearance with at least one end opening of the valve body base through the lug.

16. The kitchen exhaust pipe assembly according to any one of claims 1, 2, 5 to 8, 10, 11, 15, characterized in that; The valve body base also has a mounting flange extending outward in the radial direction of the valve body base at the opening near the end corresponding to the first retaining ring. The mounting flange has a mounting hole, and the exhaust duct is installed to the mounting flange through the mounting hole.

17. The layout of public smoke ducts in high-rise buildings, characterized by: Use the kitchen exhaust pipe assembly as described in any one of claims 1 to 16.

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