A universal check valve and a range hood / flue system

Abstract

A universal check valve includes a valve body base and a check valve plate, and further includes a first retaining ring and a second retaining ring rotatably mounted at the openings at both ends of the valve body base. The first retaining ring is connected to an exhaust duct, and the second retaining ring extends into a 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. Compared with the prior art, the technical solution provided by this utility model has the following advantages: high flexibility, strong adaptability to different scenarios, simple debugging process, suitable for oil fume airflow, thus reducing oil accumulation and providing a high safety factor; the direction of the oil fume airflow before and after entering the common flue is adjustable.

Description

Technical Field

[0001] This utility model relates to the field of check valves, and in particular to a universal check valve and a range hood and flue system. Background Technology

[0002] A backflow preventer is a component installed at the end of a branch flue to prevent external fumes and odors from entering the kitchen. When the range hood is working, the valve plate of the backflow preventer is opened to discharge fumes into the common flue, while when the range hood stops working, the valve plate remains closed to prevent fumes and odors from flowing back in.

[0003] Most existing check valves cannot regulate the flow direction of oily fumes before and after entering the public flue, resulting in aerodynamically unfavorable exhaust channels. This leads to the accumulation of large amounts of oily grease in the exhaust channels, making them difficult to clean and increasing the risk of fire. For example, the Chinese utility model patent CN208519227U, entitled "Flame Duct Fireproof Check Valve," discloses a valve comprising a housing (1) and a guide shroud (2) installed on the back of the housing (1). The housing (1) consists of a base (11) and a cylindrical body (12) protruding from the base (11). An oily fume channel (13) is provided in the middle of the cylindrical body (12). The two ends are the air inlet and the air outlet, respectively. A one-way valve (3) for sealing the oil fume channel (13) is provided in the oil fume channel (13). The one-way valve (3) is rotatably connected to the cylinder (12) through a rotating shaft (4). A return spring (5) is also provided on the rotating shaft (4). A vertical adjusting piece (6) is also provided on the back of the one-way valve (3), with one end rotatably connected to the rotating shaft (4) and the other end connected to the one-way valve (3) through an elastic return device (7). When the one-way valve (3) returns to its closed position, the one-way valve (3) can be displaced under the extension and retraction of the elastic return device (7) to adjust the angle between it and the oil fume channel (13). In the technical solution described in this utility model, when the oil fume airflow passes through the check valve located at the end of the branch pipe, it can only be guided by the predetermined structure "guide hood (2)" before being discharged into the public flue. The exhaust channel often has aerodynamically unfavorable bends and turns, which is not conducive to the efficient discharge of oil fume airflow. Moreover, it cannot flexibly adapt to the problem that the distance between the range hood and the opening of the public flue is not equal due to different installation heights, which causes the oil fume to be unable to be discharged smoothly and efficiently.

[0004] Currently, only a few manufacturers have developed products capable of regulating the flow direction of cooking fumes after they enter a public flue. For example, Chinese utility model patent CN218295899U, entitled "A Flue Guide Device and Centralized Smoke Exhaust System," discloses a device comprising a hollow shell with an indoor fume exhaust inlet on one side and an exhaust outlet on the upper side. The lower side of the shell has an exhaust inlet for a public flue. A guide plate is connected to the shell, with its lower side rotatably connected to the shell at a location away from the indoor and public flue exhaust inlets. The upper side of the guide plate is located inside the shell and can deflect within it. This guide plate can guide fumes entering the shell from the indoor exhaust inlet to the exhaust outlet, and also guide fumes entering the shell from the public flue exhaust inlet to the exhaust outlet. The guide plate is connected to a drive mechanism, and under the action of the drive mechanism, the guide plate can rotate along its lower side while its upper side deflects within the shell. Although the upper side of the guide plate can deflect within the housing and the lower side can rotate under the action of the driving structure, thereby adjusting the direction of the oil fume airflow when it is discharged from the oil fume exhaust outlet, this can only ensure that the oil fume airflow has a relatively reasonable and efficient discharge direction when it is discharged from the housing into the public flue. However, it cannot guarantee that the oil fume exhaust inlet of the housing also has a pneumatically advantageous exhaust channel. Therefore, it still cannot guarantee that the product has a good exhaust effect.

[0005] Furthermore, Chinese utility model patent CN211779205U, entitled "A Fume Check Valve with Easy-to-Start Valve Plate," discloses a system comprising: a main valve ring 1, a pressure sensor, a support rod 6, a linear drive 5, and a valve plate 3; the main valve ring 1 has a pressure sensor inside, and a movable ring 2 is provided at the opening of the main valve ring 1, the upper end of which is hinged to the main valve ring 1; the edge of the movable ring 2 is connected to the main valve ring 1 via a telescopic tube; one end of the support rod 6 is fixed to the main valve ring 1; the other end of the support rod 6 points towards and abuts against the valve plate 3; the linear drive 5 and the pressure sensor... The linear drive 5 is hinged to the main valve ring 1, and the drive end of the linear drive 5 is hinged to the movable ring 2. The valve plate 3 is in contact with the movable ring 2, and the upper end of the valve plate 3 is hinged to the main valve ring 1. When the air pressure sensor detects that the air pressure in the main valve ring 1 exceeds a threshold, the linear drive 5 pulls the movable ring 2 away from the valve plate 3, and the support rod 6 supports the valve plate 3 to separate from the movable ring 2. When the air pressure sensor detects that the air pressure in the main valve ring 1 is lower than the threshold, the linear drive 5 pulls the movable ring 2 closer to the valve plate 3, and the valve plate 3 is in contact with the movable ring 2. In this utility model, the telescopic tube between the movable ring 2 and the main valve ring 1 is mainly used to overcome the problem that the valve plate 3 and the main valve ring 1 are stuck together and cannot be separated due to the accumulation of a large amount of oil stains after long-term use. It is not used to adjust the flow direction of the oil fume airflow before and after entering the public flue. Therefore, it does not make a corresponding contribution to the efficient discharge of oil fumes. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a universal check valve, range hood, and flue system that are highly flexible, adaptable to various scenarios, easy to debug, suitable for the flow of oily fumes to reduce oil accumulation, have a high safety factor, and allow for adjustment of the direction of the oily fumes before and after entering the public flue.

[0007] The present invention mainly adopts the following technical solution:

[0008] A universal check valve includes a valve body base and a check valve plate, and further includes a first retaining ring and a second retaining ring rotatably mounted at the openings at both ends of the valve body base. The first retaining ring is connected to a smoke exhaust duct, and the second retaining ring extends into a 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.

[0009] It also includes a linkage rod, one end of which is connected to the first retaining ring and the other end of which is connected to the second retaining ring. When the first retaining ring / second retaining ring rotates relative to the valve body base, it also drives the second retaining ring / first retaining ring to rotate relative to the valve body base.

[0010] 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.

[0011] At least a portion of the connecting rod is located inside or outside the valve body base.

[0012] 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.

[0013] The valve body base has a through hole near at least one end opening, and the first retaining ring and / or the second retaining ring have mating holes, with the pin passing through the through hole and the mating hole.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] A range hood that uses the aforementioned universal check valve.

[0018] A flue system employing the aforementioned universal check valve.

[0019] According to the technical solution described in this utility model, the following beneficial effects are achieved: 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; 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 airflow before and after entering the common flue can be adjusted. This facilitates flexible adjustment of the bending or turning angle of the exhaust channel based on the distance between the range hood's installation height and the opening of the common flue, thereby forming a pneumatically advantageous exhaust channel, reducing the accumulation of oil stains, and promoting efficient exhaust of oil fumes; the linkage rod setting... This design allows for simultaneous adjustment of the first and second retaining rings. Even if the second retaining ring extends into the common flue, its rotation angle can still be adjusted via the linkage rod, simplifying the adjustment process. The linkage rod connects to the first and second retaining rings via connecting beams on the connecting protrusions, resulting in a simple structure, low manufacturing difficulty, and suitability for mass production. Lugs on the valve body base provide a rotational clearance between the first and / or second retaining rings and the valve body base, thus providing greater space for rotation, a wider angle adjustment range, and better aerodynamic flue gas flow. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a universal check valve.

[0021] Figure 2 for Figure 1 Schematic diagram of the side structure of the universal check valve.

[0022] Figure 3 This is a schematic diagram of the disassembled structure of a universal check valve.

[0023] Figure 4 This is a schematic diagram of a range hood and flue system that uses a universal check valve.

[0024] 2. Smoke exhaust duct, 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 lug, 51. Connecting beam, Q. Mating hole, H. Rotation clearance. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings:

[0026] See Figure 1-3As shown, a universal check valve 3 includes a valve body base 31 and a check valve plate, and also includes a first retaining ring 32 and a second retaining ring 33 rotatably mounted at 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, through this structural design, the flow direction of the oil fume airflow before entering the public flue and after entering the public flue can be adjusted. This allows for flexible adjustment of the bending or turning angle of the exhaust channel based on the distance between the range hood installation height and the opening of the public flue. It offers high flexibility and strong adaptability to different scenarios, making it easier to form an aerodynamically advantageous exhaust channel with good exhaust effect. This reduces the accumulation of oil stains, promotes efficient exhaust of oil fume airflow, facilitates cleaning, and prevents the risk of fire.

[0027] See Figure 1-3 As shown, it also includes a linkage rod 4. One end of the linkage rod 4 is connected to the first retaining ring 32, and the other end of the linkage rod 4 is connected to the second retaining ring 33. When the first retaining ring 32 / second retaining ring 33 rotates relative to the valve body base 31, it also drives the second retaining ring 33 / first retaining ring 32 to rotate relative to the valve body base 31. In this application, the linkage 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 linkage rod can still drive the second retaining ring to adjust its rotation angle. The adjustment process is simple and easy to operate.

[0028] See Figure 1-3 As 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.

[0029] See Figure 1-3As shown, at least a portion of the connecting rod 4 is located inside or outside the valve body base 31. In one embodiment of this application, for a more aesthetically pleasing and neat appearance, the connecting protrusion can be formed on the inner sidewall of the first retaining ring and the inner sidewall of the second retaining ring. In another embodiment of this application, to avoid long-term oil accumulation affecting the movement of the connecting rod, the connecting protrusion can also be formed on the outer sidewall of the first retaining ring and the outer sidewall of the second retaining ring. This application also includes, but is not limited to, such embodiments, where at least a portion of the connecting rod is located outside the valve body base. When the first and second retaining rings rotate relative to the valve body base, the connection point between the connecting rod located outside the valve body base and the first and second retaining rings, or the first and second retaining rings themselves, is stopped by the top of the valve body base, thus limiting the rotation angle and preventing excessive oil accumulation from affecting the movement of the connecting rod.

[0030] See Figure 1-3 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.

[0031] See Figure 1-3 As shown, the valve body base 31 has a through hole 310 near at least one end opening, and the first retaining ring 32 and / or the second retaining ring 33 have mating holes Q. The pin passes through the through hole 310 and the mating hole Q. In this application, preferably, the through holes 310 are symmetrically opened 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 310. 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).

[0032] See Figure 1-3 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 310 of the two lugs 311. 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).

[0033] See Figure 1 As 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.

[0034] See Figure 1-3 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.

[0035] See Figure 4 As shown, a range hood uses the aforementioned universal check valve.

[0036] See Figure 4 As shown, a flue system employs the aforementioned universal check valve.

[0037] 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 universal check valve, comprising a valve body base and a check valve disc, characterized in that: It also includes a first retaining ring and a second retaining ring rotatably mounted at 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 universal check valve according to claim 1, characterized in that: It also includes a linkage rod, one end of which is connected to the first retaining ring and the other end of which is connected to the second retaining ring. When the first retaining ring / second retaining ring rotates relative to the valve body base, it also drives the second retaining ring / first retaining ring to rotate relative to the valve body base.

3. The universal check valve according to claim 2, 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.

4. The universal check valve according to claim 2, characterized in that: At least a portion of the connecting rod is located inside or outside the valve body base.

5. The universal check valve according to claim 4, 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.

6. The universal check valve according to any one of claims 1 to 5, 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.

7. The universal check valve according to any one of claims 1 to 5, 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.

8. The universal check valve according to claim 7, 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.

9. The universal check valve according to any one of claims 1 to 5 and 8, 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.

10. A range hood, characterized in that: The universal check valve described in any one of claims 1 to 9 is used.

11. A flue system, characterized in that: The universal check valve described in any one of claims 1 to 9 is used.

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