A flue check valve to prevent cross-flow of wind and odor

Abstract

The present invention provides a flue check valve for preventing wind and odor from crossing over, and relates to the technical field of kitchen appliances. At least one relative surface of a valve seat or a valve plate of the present invention is provided with a plurality of circles of concave-convex groove groups. When the valve plate is rotated to be buckled on the valve seat, the convex part of the concave-convex groove group is in close contact with the valve seat or the valve plate, that is, the indoor oil smoke first contacts with the concave-convex groove group embedded in the inner circle. Due to the resistance of the concave-convex groove group embedded in the inner circle, the wind pressure and temperature of the oil smoke can be blocked. Similarly, the oil smoke of the public flue first contacts with the concave-convex groove group of the outer circle through the smoke exhaust hole. Due to the resistance of the concave-convex groove group embedded in the outer circle, the wind pressure and temperature of the oil smoke can be blocked, and the force acting on the valve plate is reduced. Therefore, the valve plate is not easy to deform, and the valve plate and the valve port on the valve seat are always kept in a strong sealing state, thereby avoiding the phenomenon of oil smoke backflow in the public flue due to deformation of the valve plate of the check valve after the check valve has been used for a period of time.

Description

Technical Field

[0001] The invention relates to the technical field of kitchen appliances, and in particular to a flue check valve to prevent cross-wind and cross-odor. Background Art

[0002] The check valve is used in flues. Its main function is to prevent the backflow of media. It can be applied to pipelines of various media. Flue check valves have been widely used in modern housing construction. They can prevent the backflow of oil smoke and play a role in connecting pipelines.

[0003] However, the flue check valve in the prior art has the problem of backflow of public oil smoke. The main reason is that after the check valve has been used for a period of time, its door panel and silicone pad are easily deformed after being heated, or residues stick to the sealing strip and the door panel of the check valve during use, resulting in a poor seal between the door panel and the valve hole of the check valve, which in turn causes the backflow of oil smoke in the public flue. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a flue check valve to prevent wind and odor cross-contamination, so as to solve the technical problem that the check valve and silicone pad used in the prior art are deformed due to heat, resulting in poor sealing between the door panel and the valve hole of the check valve, and then the backflow of oil smoke occurs.

[0005] In order to achieve the above-mentioned objectives, the present invention provides a flue check valve to prevent cross-wind and odor transfer, including a valve body, the valve body having an exhaust pipe connecting the inside and the outside, the exhaust pipe being provided with a valve seat and a valve plate, the valve plate being able to rotate relative to the valve seat and being used to seal the valve port of the valve seat, and at least one opposite surface of the valve seat or the valve plate being provided with a plurality of circles of concave-convex groove groups, and when the valve plate is buckled on the valve seat, the convex parts of the concave-convex groove groups are tightly against the valve seat or the valve plate.

[0006] Optionally, the concave-convex groove group consists of a plurality of grooves and a plurality of protrusions, and silicone pads are installed on the grooves and / or the protrusions, or the silicone pads are installed on both sides of the concave grooves, or silicone pads are installed on both sides of the convex grooves.

[0007] Optionally, the concave-convex groove group includes a first concave-convex groove group and a second concave-convex groove group, the first concave-convex groove group is located on the valve seat, and the second concave-convex groove group is located on the valve sheet.

[0008] Optionally, the valve seat is arranged vertically, inclined or horizontally.

[0009] Optionally, when the valve seat is arranged vertically, the valve plate is rotatably connected to the inner wall of the exhaust pipe via a rotating shaft.

[0010] Optionally, a non-return torsion spring is installed on the rotating shaft, one fixed end of the non-return torsion spring is connected to the valve body, and the other fixed end is connected to the valve plate;

[0011] Alternatively, the valve plate is electrically connected to a motor, and the motor drives the valve plate to rotate toward the valve body.

[0012] Optionally, when the valve seat is arranged at an angle, the valve plate is rotatably connected to the inner wall of the exhaust pipe via a rotating shaft.

[0013] Optionally, the cross-section of the exhaust pipe is a U-shaped structure.

[0014] Optionally, an inspection hole is provided on the top wall of the valve body, and an upper cover plate is sealed on the inspection hole.

[0015] Optionally, an air inlet connector is provided at one end of the valve body, and a fixing plate is provided at the other end.

[0016] The flue check valve for preventing wind and odor from flowing through provided by the present invention has the following technical effects:

[0017] The check valve comprises a valve body, wherein the valve body is provided with an exhaust pipe communicating with the inside and the outside, wherein a valve seat and a valve disc are arranged in the exhaust pipe, and the valve disc can rotate relative to the valve seat and can also be used to block the valve port of the valve seat. Unlike the traditional check valve, the valve seat or valve disc of the present invention has at least one relative surface provided with a plurality of circles of concave-convex groove groups on which a plurality of circles of concave-convex groove groups are formed. When the valve disc rotates away from the valve port, the indoor oil smoke is discharged outward through the valve port. When the valve disc rotates to be buckled on the valve seat, the convex part of the concave-convex groove group is in close contact with the valve seat or the valve disc, i.e., the indoor oil smoke first contacts with the concave-convex groove group embedded in the inner circle. Due to the resistance of the concave-convex groove group embedded in the inner circle, the wind pressure and temperature of the oil smoke can be blocked. Similarly, the oil smoke from the public flue first contacts the concave-convex groove group of the outer circle through the smoke exhaust hole. Due to the resistance of the concave-convex groove group of the outer circle, the wind pressure and temperature of the oil smoke can be blocked. Since the inner and outer oil smoke are separated by the inner and outer concave-convex grooves, although the wind pressure and temperature of the inner and outer concave-convex grooves are different, the inner and outer concave-convex grooves will not directly transmit the wind pressure and temperature difference, so the force on the valve plate is reduced, so the valve plate is not easy to deform, and the valve plate and the valve port on the valve seat are always kept in a strong sealing state, avoiding the phenomenon of oil smoke backflow in the public flue due to the deformation of the valve plate of the check valve after a period of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 1 is a side view of the structure of the flue check valve for preventing cross-flow of wind and odor according to the present invention;

[0020] Figure 2 yes Figure 1 Internal structure diagram of the flue check valve for preventing cross-flow of air and odor;

[0021] Figure 3 yes Figure 1 A schematic diagram of the structure of the valve body of the medium-sized flue check valve for preventing cross-flow of air and odor;

[0022] Figure 4 yes Figure 1 A schematic diagram of the structure of the upper cover plate of the flue check valve for preventing cross-flow of air and odor;

[0023] Figure 5 yes Figure 4 A schematic diagram of the structure of the sealing ring corresponding to the upper cover plate;

[0024] Figure 6 yes Figure 1 A schematic diagram of the structure of the fixing plate of the flue check valve for preventing cross-flow of air and odor;

[0025] Figure 7 yes Figure 6 A schematic diagram of the structure of the sealing ring corresponding to the fixed plate;

[0026] Figure 8 2 is a side view of the structure of the flue check valve for preventing cross-flow of wind and odor according to the present invention;

[0027] Fig. 9 yes Figure 8 Diagram of the internal structure of the flue check valve to prevent cross-flow of air and odor.

[0028] In the figure:

[0029] 1. Valve body; 11. Exhaust pipe; 111. Smoke exhaust hole; 112. Arc-shaped convex structure; 12. Valve seat; 121. First concave-convex groove group; 122. Valve port; 13. Inspection hole;

[0030] 2. Check structure; 21. Valve plate; 211. Second concave-convex groove group; 22. Rotating shaft; 23. Check torsion spring;

[0031] 3. Fixed plate; 31. Fixed plate sealing ring;

[0032] 4. Upper cover plate; 41. Cover plate sealing ring. DETAILED DESCRIPTION

[0033] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0034] Based on the defects of the prior art, the anti-wind and odor cross-contamination flue check valve of the present invention is described in detail below in combination with specific Examples 1 and 2.

[0035] Embodiment 1:

[0036] This embodiment provides a flue check valve to prevent cross-flow of wind and odor, such as Figure 1-7 As shown, the check valve includes a valve body 1 and a check structure 2, the check structure 2 is installed in the valve body 1, the valve body 1 has an exhaust pipe 11 connecting the inside and the outside, the two ends of the exhaust pipe 11 are respectively a smoke inlet hole and a smoke exhaust hole 111, and the front end interface of the smoke inlet hole can be a variety of types of air inlet pipes.

[0037] like Figure 1 and Figure 2 As shown, the valve port 122 of this embodiment has three first concave-convex groove groups 121 in the circumference, and the radius of the three first concave-convex groove groups 121 is different, decreasing from the outside to the inside, and is concentrically arranged with the center point of the valve port 122 as the center, and the check structure 2 includes a valve plate 21, the valve plate 21 is used to block the valve port 122, and can rotate relative to the valve port 122 in the exhaust pipe 11, and the side of the valve plate 21 used for blocking the valve port 122 is provided with a first concave-convex groove group 121. The second concave-convex groove group 211 is also provided, and the second concave-convex groove group 211 also includes three. The radii of the three second concave-convex groove groups 211 are different, decreasing from the outside to the inside, and are concentrically arranged with the center point of the valve plate 21 as the center. When the valve plate 21 rotates away from the valve port 122, the oil smoke is discharged outward through the valve port 122 and the smoke exhaust hole 111 in turn. When the valve plate 21 is buckled on the valve port 122, each first concave-convex groove group 121 is interlocked with the corresponding second concave-convex groove group 211.

[0038] It should be noted that the present invention does not limit the shape of the first concave-convex groove group 121 arranged circumferentially of the valve port 122, which may be circular, square, rectangular, triangular, polygonal or elliptical, etc., and the present embodiment is preferably circular; similarly, the present invention does not limit the shape of the second concave-convex groove group 211 arranged circumferentially of the valve plate 21, which may be circular, square, rectangular, triangular, polygonal or elliptical, etc., and the present embodiment is also preferably circular.

[0039] The present invention also does not limit the number of the first concave-convex groove group 121 and the second concave-convex groove group 211 , and at least one of them can satisfy the basic functions of the present invention.

[0040] The reason why the check valve of the present invention can prevent wind and odor from flowing into the air is as follows:

[0041] When the exhaust pipe 11 is closed, the oil smoke in the exhaust pipe 11 first contacts with the first concave-convex groove group 121 and the second concave-convex groove group 211 of the outer ring. The oil smoke in the exhaust pipe 11 is blocked by the resistance of the first concave-convex groove group 121 and the second concave-convex groove group 211 of the outer ring. Similarly, when the exhaust pipe 11 is closed, the oil smoke retained in the valve port 122 first contacts with the first concave-convex groove group 121 and the second concave-convex groove group 211 of the inner ring. The wind pressure and temperature of the oil fume can be blocked due to the resistance of the first concave-convex groove group 121 and the second concave-convex groove group 211. Due to the existence of the first concave-convex groove group 121 and the second concave-convex groove group 211, the inner circle and the outer circle block the negative pressure and room temperature difference, the temperature and pressure of the oil fume are reduced, and the middle circle is not subject to any large changes in pressure and temperature difference, thereby improving the sealing performance and reducing the force on the valve plate 21. Therefore, the pressure on both sides of the valve plate 21 is limited and it is not easy to deform, thereby keeping a strong sealing state between the valve plate 21 and the valve port 122.

[0042] According to a preferred embodiment, the first concave-convex groove group 121 is composed of a plurality of grooves and a plurality of protrusions, and the protrusions and the grooves are preferably arranged alternately, that is, there are grooves on both sides of the protrusion, and there are protrusions on both sides of the groove; similarly, the second concave-convex groove group 211 is also composed of a plurality of grooves and a plurality of protrusions, and the protrusions and the grooves are preferably arranged alternately, that is, there are grooves on both sides of the protrusion, and there are protrusions on both sides of the groove.

[0043] In this embodiment, a silicone pad is installed on the groove and / or protrusion, and the silicone pad can increase the sealing between the valve port 122 and the valve plate 21 and reduce closing noise.

[0044] The valve port 122 of the present embodiment is arranged at an angle, and the check structure 2 includes a rotating shaft 22 connected to the valve plate 21. Both ends of the rotating shaft 22 are rotatably connected to the inner wall of the exhaust pipe 11 respectively. The angle between the plane where the valve port 122 is located and the valve plate 21 is an acute angle. In this way, the valve plate 21 has a shorter stroke when rotating toward the valve port 122, and there is no need to set a torsion spring on the rotating shaft 22. The valve plate can be closed to the valve seat by its own weight.

[0045] Since no torsion spring is required on the rotating shaft 22 , when the valve plate 21 is buckled on the valve port 122 , the resistance of the valve plate 21 to the oil smoke is very small, that is, the valve plate 21 can be lifted up by a relatively small amount of oil smoke wind force.

[0046] According to a preferred embodiment, Figure 3As shown, the cross-section of the exhaust duct 11 is U-shaped, that is, the bottom wall of the exhaust duct 11 is an outwardly convex arc structure 112. The convex arc here refers to the middle part bulging outward. Compared with the flat bottom and the circular cross-section of the exhaust duct 11, the arc-shaped bottom can more easily collect residual oil stains.

[0047] According to a preferred embodiment, Figure 3-5 As shown, an inspection hole 13 is provided on the top wall of the valve body 1, and the upper cover plate 4 is sealed on the inspection hole 13. The upper cover plate 4 is sealed by the cover plate sealing ring 41. Of course, the inspection hole can also be set on the left, right and bottom.

[0048] An inspection hole 13 is provided on the top of the valve body 1. When damage occurs inside the valve body 1, the upper cover plate 4 can be opened directly to inspect the inside of the valve body 1, which is simple and quick.

[0049] According to a preferred embodiment, Figure 6 and Figure 7 As shown, a fixing plate 3 is provided on the side wall of the valve body 1 having the smoke exhaust hole 111 , and the valve body 1 is installed through the fixing plate 3 . In order to enhance the sealing strength of the valve body 1 installation, the fixing plate 3 also has a fixing plate sealing ring 31 .

[0050] Embodiment 2:

[0051] This embodiment provides a flue check valve to prevent cross-flow of wind and odor, such as Figure 8 and Fig. 9 As shown, the check valve includes a valve body 1 and a check structure 2. The check structure 2 is installed in the valve body 1. The valve body 1 has an exhaust pipe 11 connecting the inside and the outside. The two ends of the exhaust pipe 11 are respectively a smoke inlet hole and a smoke exhaust hole 111.

[0052] like Figure 8 and Fig. 9 As shown, the valve port 122 of this embodiment has three first concave-convex groove groups 121 in the circumference, and the radius of the three first concave-convex groove groups 121 is different, decreasing from the outside to the inside, and is concentrically arranged with the center point of the valve port 122 as the center; and the check structure 2 includes a valve plate 21, the valve plate 21 is used to block the valve port 122, and can rotate relative to the air inlet in the exhaust pipe 11, and the side of the valve plate 21 used for blocking the valve port 122 is provided with a first concave-convex groove group 121. The second concave-convex groove group 211 also includes three second concave-convex groove groups 211. The radii of the three second concave-convex groove groups 211 are different, decreasing from the outside to the inside, and are concentrically arranged with the center point of the valve plate 21 as the center. When the valve plate 21 rotates away from the valve port 122, the oil smoke is discharged outward through the valve port 122 and the smoke exhaust hole 111 in turn. When the valve plate 21 is buckled on the valve port 122, each first concave-convex groove group 121 is interlocked with the corresponding second concave-convex groove group 211.

[0053] It should be noted that the present invention does not limit the shape of the first concave-convex groove group 121 arranged circumferentially of the valve port 122, which may be circular, square, rectangular, triangular, polygonal or elliptical, etc., and the present embodiment is preferably circular; similarly, the present invention does not limit the shape of the second concave-convex groove group 211 arranged circumferentially of the valve plate 21, which may be circular, square, rectangular, triangular, polygonal or elliptical, etc., and the present embodiment is also preferably circular.

[0054] The present invention also does not limit the number of the first concave-convex groove group 121 and the second concave-convex groove group 211 , and at least one of them can satisfy the basic functions of the present invention.

[0055] The reason why the check valve of the present invention can prevent wind and odor from flowing into the air is as follows:

[0056] When the exhaust pipe 11 is closed, the oil smoke in the exhaust pipe 11 first contacts with the first concave-convex groove group 121 and the second concave-convex groove group 211 of the outer ring. The oil smoke in the exhaust pipe 11 is blocked by the resistance of the first concave-convex groove group 121 and the second concave-convex groove group 211 of the outer ring. Similarly, when the exhaust pipe 11 is closed, the oil smoke retained in the valve port 122 first contacts with the first concave-convex groove group 121 and the second concave-convex groove group 211 of the inner ring. The wind pressure and temperature of the oil fume can be blocked due to the resistance of the first concave-convex groove group 121 and the second concave-convex groove group 211. Due to the existence of the first concave-convex groove group 121 and the second concave-convex groove group 211, the inner circle and the outer circle block the negative pressure and room temperature difference, the temperature and pressure of the oil fume are reduced, and the middle circle is not subject to any large changes in pressure and temperature difference, thereby improving the sealing performance and reducing the force on the valve plate 21. Therefore, the pressure on both sides of the valve plate 21 is limited and it is not easy to deform, thereby keeping a strong sealing state between the valve plate 21 and the valve port 122.

[0057] According to a preferred embodiment, the first concave-convex groove group 121 is composed of a plurality of grooves and a plurality of protrusions, and the protrusions and the grooves are preferably arranged alternately, that is, there are grooves on both sides of the protrusion, and there are protrusions on both sides of the groove; similarly, the second concave-convex groove group 211 is also composed of a plurality of grooves and a plurality of protrusions, and the protrusions and the grooves are preferably arranged alternately, that is, there are grooves on both sides of the protrusion, and there are protrusions on both sides of the groove.

[0058] The valve port 122 of this embodiment is vertically arranged, and the check structure 2 includes a rotating shaft 22 connected to the valve plate 21. Both ends of the rotating shaft 22 are rotatably connected to the inner wall of the exhaust pipe 11 respectively, and the angle between the plane where the valve port 122 is located and the valve plate 21 is a right angle.

[0059] In order to enhance the sealing strength between the valve plate 21 and the valve port 122 , a non-return torsion spring 23 is installed on the rotating shaft 22 . One fixed end of the non-return torsion spring 23 is connected to the valve body 1 , and the other fixed end is connected to the valve plate 21 .

[0060] In this embodiment, a non-return torsion spring 23 is arranged on the rotating shaft 22. When the valve plate 21 is buckled on the valve opening 122, the resistance of the valve plate 21 to the oil smoke is relatively large, that is, sufficient oil smoke wind force can overcome the gravity of the valve plate 21 to lift the valve plate 21.

[0061] Embodiment 3

[0062] In this embodiment, the inclined setting of the valve seat in the first embodiment or the vertical setting of the valve seat in the second embodiment can be replaced by a horizontal setting. The other structures are the same. When the valve seat is set horizontally, the valve plate is also set horizontally. When the valve seat is not in operation, the valve port on the valve seat is in a normally closed state.

[0063] In the description of the present invention, it should be noted that, unless otherwise specified, "multiple" means two or more than two; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0064] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electric connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0065] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A flue check valve to prevent cross-flow of wind and odor, comprising a valve body, wherein the valve body has an exhaust pipe connecting the inside and the outside, characterized in that: A valve seat and a valve plate are provided in the exhaust duct. The valve plate can rotate relative to the valve seat and is used to seal the valve port of the valve seat. At least one opposite surface of the valve seat or the valve plate is provided with a plurality of circles of concave-convex groove groups. When the valve plate is buckled on the valve seat, the convex part of the concave-convex groove group is in close contact with the valve seat or the valve plate.

2. The flue check valve for preventing cross-flow of wind and odor according to claim 1 is characterized in that: The concave-convex groove group is composed of a plurality of grooves and a plurality of protrusions, and silicone pads are installed on the grooves and / or the protrusions, or the silicone pads are installed on both sides of the concave grooves, or the silicone pads are installed on both sides of the convex grooves.

3. The flue check valve for preventing cross-flow of wind and odor according to claim 1 is characterized in that: The concave-convex groove group includes a first concave-convex groove group and a second concave-convex groove group, the first concave-convex groove group is located on the valve seat, and the second concave-convex groove group is located on the valve sheet.

4. The flue check valve for preventing cross-flow of wind and odor according to any one of claims 1 to 3, characterized in that: The valve seat is arranged vertically, inclined or horizontally.

5. The flue check valve for preventing cross-flow of wind and odor according to claim 4 is characterized in that: When the valve seat is arranged vertically, the valve plate is rotatably connected to the inner wall of the exhaust pipe via a rotating shaft.

6. The flue check valve for preventing cross-flow of wind and odor according to claim 5 is characterized in that: A non-return torsion spring is installed on the rotating shaft, one fixed end of the non-return torsion spring is connected to the valve body, and the other fixed end is connected to the valve plate; Alternatively, the valve plate is electrically connected to a motor, and the motor drives the valve plate to rotate toward the valve body.

7. The flue check valve for preventing cross-flow of wind and odor according to claim 4 is characterized in that: When the valve seat is tilted, the valve plate is rotatably connected to the inner wall of the exhaust pipe via the rotating shaft.

8. The flue check valve for preventing cross-flow of wind and odor according to claim 1 is characterized in that: The cross section of the exhaust pipe is a U-shaped structure.

9. The flue check valve for preventing cross-flow of wind and odor according to claim 1, characterized in that: An inspection hole is arranged on the top wall of the valve body, and an upper cover plate is sealed on the inspection hole.

10. The flue check valve for preventing cross-flow of wind and odor according to claim 1, characterized in that: An air inlet joint is arranged at one end of the valve body, and a fixing plate is arranged at the other end.

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