Check valve seat and range hood

Abstract

The utility model provides a check valve seat and a range hood, and relates to the technical field of kitchen utensils, the check valve seat provided by the utility model comprises a valve seat body, a rotating shaft and an air guide angle, an inner supporting piece of the valve seat body is provided with a positioning groove and a bayonet, the positioning groove and the bayonet are arranged from one axial end of the inner supporting piece to the other axial end, and the air guide angle is arranged on the rotating shaft. The rotating shaft is clamped in the positioning groove, and the air guide angle is clamped in the bayonet. According to the check valve seat, a check valve iron ring does not need to be installed, the number of parts is reduced, cost is reduced, and the installation and disassembly efficiency of the check valve seat is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a check valve seat and a range hood. Background Art

[0002] The check valve seat assembly is an air guide assembly with one end mounted on the air outlet of the range hood casing and the other end connected to the air duct to suck and discharge the oil smoke into the public flue. The check valve seat assembly plays the role of guiding air and reducing noise.

[0003] The traditional check valve seat assembly consists of a plastic check valve seat, a check valve guide angle, and a check valve metal component. The check valve metal component consists of a check valve iron ring, two check valve blades, a rotating shaft, and a spring. During installation, first place the ends of the check valve guide angle into the plastic check valve seat's stoppers. Then, insert the rotating shaft with the check valve blades and spring into the corresponding holes inside the check valve. Finally, press the check valve iron ring against the check valve guide angle and secure it to the plastic check valve seat with four screws.

[0004] The traditional method of fixing the check valve iron ring increases the cost of the check valve seat assembly. On the other hand, this fixing method is relatively cumbersome and complicated, and the operation time is long. Utility Model Content

[0005] The purpose of the utility model is to provide a check valve seat and a range hood, which do not require the installation of a check valve iron ring, reduce parts, reduce costs, and improve the installation and disassembly efficiency of the check valve seat.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] In the first aspect, the utility model provides a check valve seat, comprising a valve seat body, a rotating shaft and an air guide angle, the inner support member of the valve seat body having a positioning groove and a bayonet, the positioning groove and the bayonet are both opened from one axial end of the inner support member toward the other end, the rotating shaft is clamped in the positioning groove, and the air guide angle is clamped in the bayonet.

[0008] Furthermore, one end of the valve seat body along its own axial direction is a first port, and the other end is a second port, and the positioning groove and the bayonet are both opened from the end of the inner support member close to the second port toward the end close to the first port;

[0009] The valve seat body is projected from the second port to the first port, and the bayonet is located on the inner side of the positioning groove along the radial direction of the valve seat body; the axial distance between the positioning groove and the second port is smaller than the axial distance between the bayonet and the second port.

[0010] Furthermore, the positioning groove includes a guide portion, a limiting portion and a matching portion which are connected in sequence along the axial direction of the inner support member. The guide portion is opened at one axial end of the inner support member, and the opening of the guide portion gradually decreases as it approaches the limiting portion. The opening of the limiting portion is smaller than the outer diameter of the rotating shaft, and the shape of the matching portion is adapted to the outer wall of the rotating shaft.

[0011] Furthermore, the bayonet includes a first limiting port and a second limiting port connected to the first limiting port along the axial direction of the inner support member, the first limiting port is opened at one end of the axial direction of the inner support member, and the opening size of the second limiting port along the circumferential direction of the inner support member is larger than the opening size of the first limiting port along the circumferential direction of the inner support member.

[0012] Furthermore, the inner support member includes a support body and a cross-section member;

[0013] The support body is connected to the outer support member of the valve seat body and an oil guide groove is formed between the outer support member. The support body is provided with the positioning groove and a first oil guide port connected to the oil guide groove.

[0014] The cross-section piece is connected to the inner wall of the support body, and the cross-section piece is provided with the bayonet.

[0015] Furthermore, the support body is also provided with an avoidance groove, which is distributed along the circumference of the support body on at least one side of the positioning groove, and the avoidance groove and the positioning groove are both opened from the same end of the inner support member toward the other end.

[0016] Furthermore, the rotating shaft is rotatably connected to a blade, and the inner wall of the supporting body is provided with a limiting protrusion for supporting the blade.

[0017] Furthermore, the surface of the limiting protrusion used to support the blade is a curved surface, so that the limiting protrusion is in point contact with the blade.

[0018] Furthermore, the air guide angle includes an air guide strip and pins located at both ends of the air guide strip, one side of the air guide strip has a V-shaped groove extending in a direction parallel to the extending direction of the air guide strip, the other side of the air guide strip is connected to the pin, the pin and the air guide strip are snapped into the bayonet, and the pin has an oil guide port connected to the space surrounded by the inner support member.

[0019] In a second aspect, the present invention further provides a range hood comprising the check valve seat described in the above solution.

[0020] The check valve seat and range hood provided by the utility model can produce the following beneficial effects:

[0021] In the check valve seat provided by the first aspect of the present invention, the inner support member of the valve seat body is provided with a positioning groove for clamping the rotating shaft and a clamping socket for clamping the air guide angle. There is no need to install a check valve iron ring, which reduces the number of parts and reduces costs. During assembly, the installation step of the check valve iron ring is omitted, thereby improving the installation and disassembly efficiency of the check valve seat.

[0022] The range hood provided in the second aspect of the present invention has the check valve seat provided in the first aspect of the present invention, thereby having all the beneficial effects of the check valve seat provided in the first aspect of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 A schematic diagram of a partial three-dimensional structure of a check valve seat provided by an embodiment of the present utility model at a first viewing angle;

[0025] Figure 2 A schematic diagram of a partial three-dimensional structure of a check valve seat provided by an embodiment of the present utility model at a second viewing angle;

[0026] Figure 3 A schematic diagram of a partial three-dimensional structure of a valve seat body after the rotating shaft and blades are installed according to an embodiment of the present invention;

[0027] Figure 4 for Figure 3 A local enlarged schematic diagram of point A;

[0028] Figure 5 A schematic diagram of a partial three-dimensional structure of a valve seat body after installing an air guide angle according to an embodiment of the present invention;

[0029] Figure 6 for Figure 5 A partial enlarged schematic diagram of point B;

[0030] Figure 7 A partially enlarged schematic diagram of an inner support member provided in an embodiment of the present utility model;

[0031] Figure 8 A partially enlarged schematic diagram of the end portion of a wind guide angle provided in an embodiment of the present utility model.

[0032] Icons: 1-valve seat body; 11-inner support member; 111-positioning groove; 1111-guide part; 1112-limiting part; 1113-matching part; 112-bayonet; 1121-first limiting port; 1122-second limiting port; 1123-limiting surface; 113-support body; 114-cross-section member; 115-first oil guide port; 116-avoidance groove; 117-limiting protrusion; 12-first port; 13-second port; 14-outer support member; 15-oil guide groove; 2-rotating shaft; 3-air guide angle; 31-air guide strip; 32-pin; 33-V-shaped groove; 34-second oil guide port; 4-blade. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0037] The embodiment of the first aspect of the present utility model is to provide a check valve seat, such as Figures 1 to 6As shown, it includes a valve seat body 1, a rotating shaft 2 and an air guide angle 3. The inner support 11 of the valve seat body 1 has a positioning groove 111 and a bayonet 112. The positioning groove 111 and the bayonet 112 are both opened from one axial end of the inner support 11 toward the other end. The rotating shaft 2 is clamped in the positioning groove 111, and the air guide angle 3 is clamped in the bayonet 112.

[0038] When assembling the check valve seat, the rotating shaft 2 is pressed to engage the positioning groove 111 of the inner support member 11, and the air guide angle 3 is then directly engaged with the retaining opening 112 of the inner support member 11. The check valve seat integrates the functions of securing the rotating shaft 2 and the air guide angle 3 into the valve seat body 1. Compared to existing check valve seats that use a check valve iron ring for fixing, this eliminates the steps of installing the check valve iron ring and tightening the screws, making installation more convenient and easier, reducing the number of check valve seat parts, and lowering the cost.

[0039] In an optional embodiment, if Figure 2 As shown, one end of the valve seat body 1 along its own axial direction is a first port 12, and the other end is a second port 13. The middle diameter of the check valve seat is between the first port 12 and the second port 13. From the first port 12 to the second port 13, the middle diameter changes from square to round, conforming to the change from the shape of the air duct to the shape of the air pipe, thereby improving the air guiding efficiency and reducing resistance and noise.

[0040] Specifically, a check valve seat is provided on the outer side of the second port 13 to facilitate the sealed connection between the second port 13 and the air duct.

[0041] The first port 12 may be a square port or an opening of other shapes, and the second port 13 may be a circular port, an elliptical port, or an irregularly shaped port. In other words, the opening shapes of the first port 12 and the second port 13 are not limited to one.

[0042] In addition, the inner support member 11 may be in a circular ring shape, a square ring shape, a special-shaped ring shape, or other shapes. In the following embodiments, the inner support member 11 in a circular ring shape is used as an example for specific description:

[0043] In an optional embodiment, if Figure 2 As shown, the positioning groove 111 and the bayonet 112 are both opened from the end of the inner support 11 close to the second port 13 toward the end close to the first port 12. When the rotating shaft 2 and the air guide angle 3 are installed, the two can enter the valve seat body 1 from the second port 13 and be clamped on the inner support 11.

[0044] Specifically, the valve seat body 1 is projected from the second port 13 to the first port 12 , and the bayonet 112 is located on the inner side of the positioning groove 111 along the radial direction of the valve seat body 1 ; the axial distance between the positioning groove 111 and the second port 13 is smaller than the axial distance between the bayonet 112 and the second port 13 .

[0045] The above-mentioned installation method can ensure that the bayonet 112 and the positioning groove 111 have a certain distance along the radial direction of the valve seat body 1, and a certain height difference along the axial direction of the valve seat body 1, so that the air guide angle 3 can be installed and removed without removing the blades 4 on the rotating shaft 2, and the air guide angle 3 can be installed and removed independently.

[0046] In an optional embodiment, if Figure 7 As shown, the positioning groove 111 includes a guide portion 1111, a limiting portion 1112 and a matching portion 1113 which are connected in sequence along the axial direction of the inner support member 11. The guide portion 1111 is opened at one axial end of the inner support member 11. The opening of the guide portion 1111 gradually decreases as it approaches the limiting portion 1112. The opening of the limiting portion 1112 is smaller than the outer diameter of the rotating shaft 2. The shape of the matching portion 1113 is adapted to the outer wall of the rotating shaft 2.

[0047] In the above embodiment, since the opening of the guide portion 1111 gradually decreases as it approaches the limiting portion 1112, the guide portion 1111 can guide the rotating shaft 2 into the positioning groove 111, the lowermost matching portion 1113 fits against the outer wall of the rotating shaft 2, and the limiting portion 1112 in the middle can limit the movement of the rotating shaft 2.

[0048] The positioning groove 111 facilitates the insertion of the rotating shaft 2 , and after the rotating shaft 2 is inserted into the positioning groove 111 , it can effectively prevent the rotating shaft 2 from coming out.

[0049] It should be noted that the guide portion 1111 may not be provided, and the limiting portion 1112 is provided at one axial end of the inner support member 11 , that is, any groove-shaped structure that can be engaged with the rotating shaft 2 may be the positioning groove 111 mentioned in the above embodiment.

[0050] Specifically, there are two positioning grooves 111 , which are arranged opposite to each other along the radial direction of the inner support member 11 and respectively support the two ends of the rotating shaft 2 .

[0051] In an optional embodiment, if Figure 7 As shown, the bayonet 112 includes a first limiting opening 1121 and a second limiting opening 1122 connected to the first limiting opening 1121 along the axial direction of the inner support member 11. The first limiting opening 1121 is opened at one axial end of the inner support member 11, and the opening size of the second limiting opening 1122 along the circumferential direction of the inner support member 11 is larger than the opening size of the first limiting opening 1121 along the circumferential direction of the inner support member 11.

[0052] When in use, the end of the wind guide angle 3 can be inserted into the first limit opening 1121 and the second limit opening 1122. Since the opening size of the second limit opening 1122 along the circumference of the inner support member 11 is larger than the opening size of the first limit opening 1121 along the circumference of the inner support member 11, a limit surface 1123 perpendicular to the axial direction of the inner support member 11 will be formed between the first limit opening 1121 and the second limit opening 1122. The limit surface 1123 can limit the wind guide angle 3 from escaping from the clamping hole 112.

[0053] It should be noted that any opening structure that can be engaged with the air guide angle 3 can be the bayonet 112 mentioned in the above embodiment. Figure 7 As shown, the bayonet 112 is in a convex shape.

[0054] Specifically, there are two bayonet holes 112 , which are arranged opposite to each other along the radial direction of the inner support member 11 , respectively supporting the two ends of the wind guide angle 3 .

[0055] In an optional embodiment, if Figure 2 As shown, the inner support member 11 includes a support body 113 and a cross-section member 114; the support body 113 is connected to the outer support member 14 of the valve seat body 1 and an oil guide groove 15 is formed between the support body 113 and the outer support member 14, and the support body 113 is provided with a positioning groove 111 and a first oil guide port 115 connected to the oil guide groove 15; the cross-section member 114 is connected to the inner wall of the support body 113, and the cross-section member 114 is provided with a bayonet 112.

[0056] In the above embodiment, the provision of the first oil guide port 115 facilitates the entry of dirty oil into the oil guide groove 15 , thereby achieving directional outflow of the dirty oil.

[0057] The number of the first oil guide port 115 can be one, or two, three, four, etc. In a preferred embodiment, the number of the first oil guide port 115 is two.

[0058] The setting of the cross-section piece 114 facilitates the opening of the bayonet 112. Specifically, the cross-section piece 114 includes a side wall and a bottom wall. The side wall is connected to the inner wall of the support body 113, and the plane of the side wall is perpendicular to the radial direction of the support body 113. The positioning groove 111 is opened on the side wall, and the bottom wall is connected between the bottom end of the side wall and the inner wall of the support body 113.

[0059] When there are two positioning slots 111 , there are correspondingly two cross-section members 114 .

[0060] In an optional embodiment, if Figure 7 As shown, the support body 113 further defines an avoidance groove 116 , which is distributed along the circumference of the support body 113 on at least one side of the positioning groove 111 . The avoidance groove 116 and the positioning groove 111 are both opened from the same end of the inner support member 11 toward the other end.

[0061] When the rotating shaft 2 is installed into the positioning groove 111, since the opening of the limiting portion 1112 is smaller than the outer diameter of the rotating shaft 2, the limiting portion 1112 will be squeezed and deformed. The avoidance groove 116 on the side of the positioning groove 111 facilitates the deformation of the limiting portion 1112, making it easier to install and disassemble the rotating shaft 2.

[0062] In a preferred embodiment, the avoidance grooves 116 are distributed on both sides of the positioning groove 111 along the circumference of the support body 113 .

[0063] In an optional embodiment, if Figure 2 As shown, the rotating shaft 2 is rotatably connected to the blade 4 , and the inner wall of the supporting body 113 is provided with a limiting protrusion 117 for supporting the blade 4 .

[0064] When the range hood is working, the straight edge of the blade 4 passes through the rotating shaft 2, and the oil smoke flows into the first port 12 of the check valve seat and flows out of the second port 13, and the blade 4 is blown up by the wind; when the range hood stops working, the blade 4 recovers, and the arc edge of the blade 4 is supported by the limiting protrusion 117 and is in a flush state, thereby preventing outdoor smoke from entering the room along the range hood.

[0065] Specifically, the limiting protrusion 117 is 45° away from the positioning groove 111 , and there is one on each side of the circumferential positioning groove 111 of the support body 113 . There are two positioning grooves 111 , so a total of four limiting protrusions 117 are configured on the inner wall of the support body 113 .

[0066] In an optional embodiment, the surface of the limiting protrusion 117 used to support the blade 4 is an arc surface, so that the limiting protrusion 117 is in point contact with the blade 4, effectively preventing the limiting protrusion 117 from adhering to the blade 4.

[0067] Specifically, the limiting protrusion 117 may be in a 1 / 4 spherical shape, with a spherical upper surface and a semicircular lower surface, and the lower surface is flush with the cross section of the supporting body 113 .

[0068] In an optional embodiment, if Figure 8 As shown, the air guide angle 3 includes an air guide strip 31 and pins 32 located at both ends of the air guide strip 31. One side of the air guide strip 31 has a V-shaped groove 33 whose extension direction is parallel to the extension direction of the air guide strip 31. The other side of the air guide strip 31 is connected to the pin 32. The pin 32 and the air guide strip 31 are snapped into the bayonet 112. The pin 32 has a second oil guide port 34 that is connected to the space surrounded by the inner support member 11.

[0069] In the above-mentioned wind guide angle 3, the wind guide strip 31 can blow the outlet air toward the blade 4 along both sides of the V-shaped groove 33. The setting of the second oil guide port 34 facilitates the oil smoke on the wind guide strip 31 to flow down along the V-shaped groove 33 and then flow from the second oil guide port 34 along the inner support 11 to the inner wall of the valve seat body 1, thereby preventing the oil smoke from falling from the middle of the wind guide strip 31 onto the impeller.

[0070] Specifically, the cross section of the air guide strip 31 is V-shaped, and the opening of the V-shaped groove 33 is arranged toward the second port 13 .

[0071] In an optional embodiment, if Figure 8 As shown, two V-shaped struts are provided at one end of the pin 32 facing away from the air guide strip 31. The V-shaped struts can be fixed with the second limiting opening 1122 in the bayonet 112 to achieve the installation and fixation of the air guide angle 3. A certain distance is left between the two V-shaped struts to form a second oil guide port 34.

[0072] An embodiment of the second aspect of the present invention provides a range hood. The range hood provided by the embodiment of the second aspect of the present invention includes the above-mentioned check valve seat.

[0073] Specifically, the range hood includes a housing, and the first port 12 of the check valve seat is installed at the air outlet of the housing.

[0074] The range hood provided by the embodiment of the second aspect of the present invention has the check valve seat provided by the embodiment of the first aspect of the present invention, and thus has all the beneficial effects of the check valve seat provided by the embodiment of the first aspect of the present invention.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A check valve seat, characterized in that: The invention comprises a valve seat body (1), a rotating shaft (2) and an air guide angle (3); the inner support member (11) of the valve seat body (1) has a positioning groove (111) and a bayonet (112); the positioning groove (111) and the bayonet (112) are both opened from one axial end of the inner support member (11) toward the other end; the rotating shaft (2) is engaged in the positioning groove (111), and the air guide angle (3) is engaged in the bayonet (112).

2. The check valve seat according to claim 1, characterized in that: One end of the valve seat body (1) along its own axial direction is a first port (12), and the other end is a second port (13); the positioning groove (111) and the bayonet (112) are both opened from the end of the inner support member (11) close to the second port (13) toward the end close to the first port (12); The valve seat body (1) is projected from the second port (13) toward the first port (12), and the bayonet (112) is located on the inner side of the positioning groove (111) along the radial direction of the valve seat body (1); the axial distance between the positioning groove (111) and the second port (13) is smaller than the axial distance between the bayonet (112) and the second port (13).

3. The check valve seat according to claim 1, characterized in that: The positioning groove (111) includes a guide portion (1111), a limiting portion (1112) and a matching portion (1113) which are connected in sequence along the axial direction of the inner support member (11); the guide portion (1111) is opened at one axial end of the inner support member (11); the opening of the guide portion (1111) gradually decreases as it approaches the limiting portion (1112); the opening of the limiting portion (1112) is smaller than the outer diameter of the rotating shaft (2); and the shape of the matching portion (1113) is adapted to the outer wall of the rotating shaft (2).

4. The check valve seat according to claim 1, characterized in that: The bayonet (112) comprises a first limiting opening (1121) and a second limiting opening (1122) connected to the first limiting opening (1121) along the axial direction of the inner support member (11), wherein the first limiting opening (1121) is opened at one axial end of the inner support member (11), and the opening size of the second limiting opening (1122) along the circumferential direction of the inner support member (11) is larger than the opening size of the first limiting opening (1121) along the circumferential direction of the inner support member (11).

5. The check valve seat according to claim 1, characterized in that: The inner support member (11) comprises a support body (113) and a transverse member (114); The support body (113) is connected to the outer support member (14) of the valve seat body (1) and an oil guide groove (15) is formed between the support body and the outer support member (14); the support body (113) is provided with the positioning groove (111) and a first oil guide port (115) communicating with the oil guide groove (15); The cross-section piece (114) is connected to the inner wall of the supporting body (113), and the cross-section piece (114) is provided with the bayonet (112).

6. The check valve seat according to claim 5, characterized in that: The support body (113) is further provided with an avoidance groove (116), which is distributed along the circumference of the support body (113) on at least one side of the positioning groove (111), and the avoidance groove (116) and the positioning groove (111) are both opened from the same end of the inner support member (11) toward the other end.

7. The check valve seat according to claim 5, characterized in that: The rotating shaft (2) is rotatably connected to a blade (4), and the inner wall of the supporting body (113) is provided with a limiting protrusion (117) for supporting the blade (4).

8. The check valve seat according to claim 7, characterized in that: The surface of the limiting protrusion (117) used to support the blade (4) is a curved surface, so that the limiting protrusion (117) is in point contact with the blade (4).

9. The check valve seat according to any one of claims 1 to 8, characterized in that: The wind guide angle (3) comprises a wind guide strip (31) and pins (32) located at both ends of the wind guide strip (31); one side of the wind guide strip (31) has a V-shaped groove (33) whose extension direction is parallel to the extension direction of the wind guide strip (31); the other side of the wind guide strip (31) is connected to the pin (32); the pin (32) and the wind guide strip (31) are snap-fitted into the bayonet (112); the pin (32) has a second oil guide port (34) communicated with the space surrounded by the inner support member (11).

10. A range hood, characterized in that: The invention comprises a check valve seat according to any one of claims 1 to 9.

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