Check valve and range hood

Abstract

The application discloses a check valve and an extractor hood, the check valve is used on the extractor hood, the check valve comprises a shell, a check assembly and a flow guide assembly, the shell is formed with a first air duct, the check assembly is connected with the shell, the check assembly has a first state and a second state, the check assembly closes the first air duct in the first state, and the check assembly opens the first air duct in the second state; the flow guide assembly comprises one or more than one flow guide fin, the flow guide fin is arranged in the first air duct and extends along the length direction of the first air duct, and the flow guide fin splits the first air duct into two or more than two sub-air ducts, and each sub-air duct extends along the length direction of the first air duct. The application can improve the flow state of the oil fume in the first air duct through the flow guide fin, reduce the resistance of the oil fume flow, accelerate the flow speed of the oil fume, and then improve the smoke exhaust efficiency of the extractor hood.

Description

Technical Field

[0001] This application relates to the field of purification equipment technology, and in particular to a check valve and a range hood. Background Technology

[0002] Traditional Chinese culinary techniques include frying, stir-frying, deep-frying, and roasting, all of which produce oily fumes. These fumes not only severely pollute the kitchen environment but also pose significant health risks to kitchen workers who are exposed to them for extended periods. Therefore, range hoods are commonly used to absorb these fumes. However, the effectiveness of these range hoods in extracting oily fumes still needs improvement. Summary of the Invention

[0003] This application provides a check valve and a range hood to address the problem that the fume extraction effect of range hoods in related technologies still needs improvement. The technical solution is as follows;

[0004] In a first aspect, embodiments of this application provide a check valve, which is used on a range hood, and the check valve includes:

[0005] The outer casing has a first air duct and a valve body air inlet and a valve body air outlet connected to the first air duct. The outer casing is used to be installed on the main body of the range hood, and the valve body air inlet is used to connect with the air outlet of the main body of the range hood.

[0006] A check valve assembly is connected to the housing. The check valve assembly has a first state and a second state. In the first state, the check valve assembly closes the first air duct. In the second state, the check valve assembly opens the first air duct.

[0007] A flow guiding component includes one or more flow guiding plates, which are disposed within the first air duct and extend along the length of the first air duct. The flow guiding plates divide the first air duct into two or more sub-air ducts, each of which extends along the length of the first air duct.

[0008] Secondly, embodiments of this application provide a range hood, including:

[0009] Any of the check valves described above;

[0010] The main body of the smoke hood;

[0011] The smoke exhaust duct has a second air duct and a pipe inlet and a pipe outlet connected to the second air duct. The smoke exhaust duct is connected to the check valve and the pipe inlet is connected to the valve body outlet.

[0012] The check valve and range hood of this application embodiment improve the flow state of oil fumes within the first air duct of the check valve by providing a flow guiding component, which includes one or more guide vanes extending along the length of the first air duct. This improves the flow resistance of the oil fumes, increases their flow speed, and thus enhances the exhaust efficiency of the range hood. By providing a flow guiding component within the first air duct of the check valve, this application embodiment achieves improved oil fume extraction performance based on the existing structure without increasing the size of the range hood, facilitating widespread adoption. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the range hood provided in the embodiments of this application;

[0015] Figure 2 This is a cross-sectional structural schematic diagram of the first type of check valve provided in the embodiments of this application;

[0016] Figure 3 This is a cross-sectional structural diagram of the second type of check valve provided in the embodiments of this application;

[0017] Figure 4 This is a cross-sectional structural schematic diagram of the third type of check valve provided in the embodiments of this application;

[0018] Figure 5 This is a cross-sectional structural schematic diagram of the fourth type of check valve provided in the embodiments of this application;

[0019] Figure 6 This is a cross-sectional structural diagram of another range hood check valve and exhaust pipe provided in an embodiment of this application;

[0020] Figure 7 yes Figure 6 Enlarged schematic diagram of the structure at point A;

[0021] Figure 8 This is a cross-sectional structural diagram of a check valve and exhaust pipe in a range hood, as provided in an embodiment of this application.

[0022] Figure 9 yes Figure 8 Enlarged schematic diagram of the structure at point B;

[0023] Figure 10This is a three-dimensional structural diagram of a check valve and exhaust pipe in a range hood provided in an embodiment of this application;

[0024] Figure 11 yes Figure 8 A partial cross-sectional structural diagram of the exhaust duct in a range hood is shown.

[0025] Figure 12 yes Figure 11 An enlarged schematic diagram of the structure at point C.

[0026] Attached Figure Descriptions: 1. Range Hood; 10. Check Valve; 110. Outer Shell; 111. First Air Duct; 1111. Sub-Air Duct; 1112. First Channel Section; 1113. Second Channel Section; 112. Valve Body Air Inlet; 113. Valve Body Air Outlet; 114. First End Face; 115. Second End Face; 116. First Side Plate; 1161. First Sub-End Face; 1162. Second Sub-End Face; 117. Second Side Plate; 1171. Third Sub-End Face; 117 2. Fourth sub-end face; 118. Third side plate; 119. Fourth side plate; 1110. Stop part; 120. Check valve assembly; 121. Valve plate; 130. Flow guide assembly; 131. Flow guide vane; 1311. First flow guide vane; 1312. Second flow guide vane; 140. Oil receiving plate; 141. Oil receiving groove; 142. Oil leakage hole; 143. Inner peripheral plate; 144. Outer peripheral plate; 145. Base plate; 20. Range hood body; 210. Range hood air outlet; 220. 1. Smoke hood; 230. Fan; 231. Volute; 2311. Volute tongue; 30. Exhaust duct; 310. Second air duct; 320. Duct inlet; 330. Duct outlet; 340. First step; 350. Second step; 361. First flat pipe; 362. Second flat pipe; 363. Bend; 3631. Drainage plate; 364. Square-to-round check valve; 365. Reducer; 370. Sealing structure; 371. Second sealing ring; 372. 373, Third snap-fit ​​component; 40, Connector; 410, First connecting plate; 411, First sub-plate; 412, Second sub-plate; 420, Second connecting plate; 430, Third connecting plate; 441, First snap-fit ​​component; 442, First snap-fit ​​component; 443, Second snap-fit ​​component; 444, Second snap-fit ​​component; 450, First split part; 460, Second split part; 50, First sealing ring; 510, First sealing part; 520, Second sealing part. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0028] In the following description, when referring to the accompanying drawings, the same numbers in different drawings denote the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0029] Please see Figure 1 This application provides a check valve 10. The check valve 10 is used on a range hood 1. Specifically, the check valve 10 is installed between the air outlet 210 of the range hood body 20 and the exhaust pipe 30 of the range hood 1, and is used to transport the oil fumes in the range hood body 20 to the public flue or outdoors through the exhaust pipe 30, so as to realize the exhaust of oil fumes in the kitchen.

[0030] Specifically, please refer to Figure 1 and Figure 2 The check valve 10 includes a housing 110 and a check assembly 120. The housing 110 forms a first air duct 111 and a valve body air inlet 112 and a valve body air outlet 113 that communicate with the first air duct 111. The housing 110 is used to be installed on the main body 20 of the range hood, and the valve body air inlet 112 of the housing 110 is used to communicate with the range hood air outlet 210 of the main body 20 of the range hood. The check assembly 120 is connected to the housing 110 and has a first state and a second state. In the first state, the check assembly 120 closes the first air duct 111, and in the second state, the check assembly 120 opens the first air duct 111.

[0031] When the range hood 1 is in use, the check valve 10's check component 120 can be in the second state, connecting the range hood's exhaust outlet 210 to the exhaust pipe 30. The fumes drawn in by the range hood 1 during use can be transported to the common flue or outdoors via the exhaust outlet 210, the check valve 10, and the exhaust pipe 30. When the range hood 1 is not in use, the check valve 10's check component 120 can be in the first state, disconnecting the exhaust outlet 210 from the exhaust pipe 30. The space inside the range hood 20 is independent of the space inside the exhaust pipe 30, preventing fumes from the common flue or external sources from flowing back into the range hood 20 or even into the kitchen via the exhaust pipe 30, thus avoiding pollution of the kitchen interior.

[0032] The main body 20 of the range hood 1 includes a smoke collection hood 220 and a fan 230. The smoke collection hood 220 has a smoke chamber and a smoke inlet communicating with the smoke chamber. The fan 230 includes a volute 231 and an impeller disposed in the volute 231. The volute 231 is connected to the smoke chamber of the smoke collection hood 220 and the air inlet 112 of the valve body of the check valve 10, so that when the fan 230 generates negative pressure during operation, the oil fumes in the kitchen can be drawn into the smoke chamber through the smoke inlet of the smoke collection hood 220, and then transported to the public flue or outdoors through the volute 231, the check valve 10 and the exhaust pipe 30. To prevent some gas from circulating within the fan 230, a volute 231 connected to the check valve 10 may be provided with a volute tongue 2311. The volute tongue 2311 creates a first inclined region on the inner wall surface of the volute 231 corresponding to the volute tongue 2311. At this time, a second inclined region may be formed on the inner wall surface of the outer shell 110 of the check valve 10 corresponding to the volute tongue 2311. The inclination direction of the second inclined region is consistent with that of the first inclined region, which reduces the disturbance and noise generated when the fumes flow into the check valve 10 through the volute 231.

[0033] Furthermore, the check valve 10 in this embodiment also includes a flow guiding assembly 130, which includes one or more flow guiding plates 131. The flow guiding plates 131 are disposed within the first air duct 111 and extend along the length of the first air duct 111. The flow guiding plates 131 divide the first air duct 111 into two or more sub-air ducts 1111, each of which extends along the length of the first air duct 111. The outer shell 110 of the check valve 10 has a second inclined region corresponding to the volute tongue 2311, which affects the airflow within the first air duct 111 of the check valve 10. The flow guiding plates 131 can improve the flow state of the fumes within the first air duct 111, reduce the resistance during the flow of fumes, accelerate the flow speed of fumes, and thus improve the exhaust efficiency of the range hood 1. In this embodiment of the application, by setting a flow guiding component 130 in the first air duct 111 of the check valve 10, the oil fume extraction effect of the range hood 1 can be improved on the basis of the original structure without increasing the size of the range hood 1, which is conducive to its widespread use.

[0034] The flow guiding component 130 may include any number of flow guiding pieces 131. For example, the number of flow guiding pieces 131 included in the flow guiding component 130 may be one, two, three, four, five, etc., and this application embodiment does not limit this.

[0035] Optionally, please refer to Figure 2The flow guiding assembly 130 includes a flow guiding plate 131, which extends along the length of the first air duct 111, such that sub-air ducts 1111 can be formed between the two opposite plates of the flow guiding plate 131 and the inner wall of the outer casing 110. Specifically, the multiple sub-air ducts 1111 divided from the first air duct 111 by the flow guiding plate 131 include a first sub-air duct and a second sub-air duct respectively located between the two opposite plates of the flow guiding plate 131 and the inner wall of the outer casing 110. When the check valve 10 includes only one flow guiding plate 131, the manufacturing difficulty and manufacturing cost of the check valve 10 can be reduced.

[0036] Optionally, please refer to Figure 3 The flow guiding assembly 130 includes two or more flow guiding vanes 131. Each of these vanes extends along the length of the first air duct 111 and is spaced apart from the others in a direction perpendicular to the length of the first air duct 111. This allows sub-air ducts 1111 to be formed between adjacent vanes 131 and between the side vanes 131 and the inner wall of the outer casing 110. Specifically, the multiple sub-air ducts 1111 divided from the first air duct 111 by the two or more flow guiding vanes 131 include: several third sub-air ducts between adjacent vanes 131; a fourth sub-air duct between one side vane 131 and the inner wall of the outer casing 110; and a fifth sub-air duct between the other side vane 131 and the inner wall of the outer casing 110. Compared to designing a single vane 131, the arrangement of multiple vanes 131 can better improve the flow of oil fumes within the first air duct 111, facilitating the rapid and balanced discharge of oil fumes.

[0037] The valve body inlet 112 of the first air duct 111 is adapted to the range hood outlet 210 of the volute 231, and the valve body outlet 113 of the first air duct 111 is adapted to the pipe inlet 320 of the exhaust duct 30. Generally, the diameter of the pipe inlet 320 on the exhaust duct 30 is larger than the diameter of the range hood outlet 210 on the volute 231. Therefore, the diameter of the valve body outlet 113 of the first air duct 111 is larger than the diameter of the valve body inlet 112. The diameter of the first air duct 111 at various locations (e.g., at the valve body inlet 112 and the valve body outlet 113) can be measured by the area enclosed by the inner wall of the first air duct 111 at that location.

[0038] Optionally, please refer to Figure 4When the diameter of the valve body air inlet 112 is smaller than the diameter of the valve body air outlet 113, the first air duct 111 includes a first channel section 1112 near the valve body air inlet 112 and a second channel section 1113 near the valve body air outlet 113. The flow guiding assembly 130 may include three or more flow guiding plates 131, and the three or more flow guiding plates are divided into one or more first flow guiding plates 1311 and two or more second flow guiding plates 1312. One or more first flow guiding plates 1311 are located in the first channel section 1112 and extend along the length direction of the first air duct 111. The two opposite plates of the first flow guiding plate 1311 respectively form a sub-air duct 1111. For example, when the flow guiding assembly 130 includes a first flow guiding plate 1311, the first flow guiding plate 1311 divides the first channel segment 1112 into a sixth sub-flow channel and a seventh sub-flow channel, which are respectively located between two opposite plates of the first flow guiding plate 1311 and the inner wall of the outer casing 110.

[0039] Two or more second guide vanes 1312 are located in the second channel segment 1113 and extend along the length of the first air duct 111. Sub-air ducts 1111 are formed between adjacent second guide vanes 1312 and between the second guide vane 1312 located on the side and the outer shell 110. Specifically, the two or more second guide vanes 1312 divide the second channel segment 1113 into several eighth sub-air ducts located between adjacent second guide vanes 1312, a ninth sub-air duct located between one of the second guide vanes 1312 on the side and the inner wall of the outer shell 110, and a tenth sub-air duct located between the second guide vane 1312 on the other side and the inner wall of the outer shell 110.

[0040] The number of second guide vanes 1312 is greater than the number of first guide vanes 1311. When the diameter of the valve body air inlet 112 is smaller than the diameter of the valve body air outlet 113, the difference between each sub-duct 1111 can be further reduced, so that the oil fume flow state in each sub-duct 1111 can be roughly kept consistent, thereby improving the smoke exhaust effect.

[0041] It should be noted that when the diameter of the valve body inlet 112 is smaller than the diameter of the valve body outlet 113, and the difference between the diameters of the valve body inlet 112 and the valve body outlet 113 exceeds a threshold, the above-mentioned flow guiding component 130 can be configured to include a first flow guiding plate 1311 and a second flow guiding plate 1312, with the number of second flow guiding plates 1312 being greater than the number of first flow guiding plates 1311. When the difference between the diameters of the valve body inlet 112 and the valve body outlet 113 is within the threshold range, the flow guiding plate 131 can extend directly from the valve body inlet 112 to the valve body outlet 113 without the need to segment the first air duct 131.

[0042] The number of guide vanes 131 included in the flow guiding component 130, and the arrangement of the guide vanes 131 in the first air duct 111, can be flexibly adjusted according to actual needs. The following text will describe the setting of the flow guiding component 130 in detail with respect to the inclination of the first air duct 111.

[0043] Optionally, the diameter of each sub-duct 1111 on the side near the valve body inlet 112 is smaller than the diameter on the side near the valve body outlet 113. Setting each sub-duct 1111 such that the diameter on the side near the valve body inlet 112 is smaller than the diameter on the side near the valve body outlet 113 ensures that the airflow pattern within each sub-duct 1111 is roughly the same, resulting in more uniform airflow and better smoke extraction.

[0044] Optionally, along the airflow direction, the diameter of each sub-duct 1111 can gradually increase from the side near the valve body air inlet 112 to the side near the valve body air outlet 113, so as to improve the smoothness of airflow in each sub-duct 1111 and further improve the consistency of airflow state in each sub-duct 1111, thereby improving the smoke exhaust effect of the range hood 1.

[0045] Alternatively, for each sub-duct 1111, along the airflow direction, the diameter of each part of the sub-duct 1111 can be directly proportional to the distance from that part to the air inlet 112 of the valve body. The proportionality coefficient of two adjacent sub-ducts 1111 can be equal or approximately equal, so that the pipe change state of each sub-duct 1111 is roughly the same, and the oil fume flow state within each sub-duct 1111 is roughly the same, resulting in a more uniform airflow.

[0046] Optionally, to achieve a second inclined region on the inner wall surface of the outer casing 110 of the check valve 10 at the corresponding volute tongue 2311, the first air duct 111 inside the outer casing 110 can be configured as an inclined air duct. For details, please refer again. Figure 2 and Figure 3 The outer casing 110 of the check valve 10 may have a first end face 114 and a second end face 115. A first air duct 111 passes through the first end face 114 and the second end face 115, forming a valve body air inlet 112 at the first end face 114 and a valve body air outlet 113 at the second end face 115. The length direction of the first air duct 111 may be inclined relative to the first end face 114 and / or the second end face 115. Designing the first air duct 111 as an entire component to be inclined relative to the first end face 114 and / or the second end face 115 can make the airflow into the first air duct 111 of the check valve 10 through the volute 231 smoother.

[0047] The length direction of the first air duct 111 is inclined relative to the first end face 114 and / or the second end face 115, including three cases: the length direction of the first air duct 111 is inclined only relative to the first end face 114, the length direction of the first air duct 111 is inclined only relative to the second end face 115, and the length direction of the first air duct 111 is inclined relative to both the first end face 114 and the second end face 115. Preferably, the first end face 114 and the second end face 115 can be approximately parallel, and the length direction of the first air duct 111 is inclined relative to both the first end face 114 and the second end face 115, so as to facilitate the connection between the check valve 10 and the main body 20 of the range hood and the exhaust pipe 30.

[0048] Optionally, the outer shell 110 can be assembled from multiple plates, and the multiple plates enclose each other to form a first air duct 111, a valve body air inlet 112, and a valve body air outlet 113; the outer shell 110 can also be a one-piece molded structure, and the first air duct 111, the valve body air inlet 112, and the valve body air outlet 113 are formed by drilling or other means.

[0049] Optionally, the housing 110 includes a first side plate 116 and a second side plate 117, the first side plate 116 and the second side plate 117 being spaced apart along a first direction, wherein the first direction intersects the extending direction of the first side plate 116, so that a first air duct 111 can be formed between the first side plate 116 and the second side plate 117. The first side plate 116 has a first sub-end face 1161 and a second sub-end face 1162 that are distributed opposite to each other along its extension direction. The second side plate 117 has a third sub-end face 1171 and a fourth sub-end face 1172 that are distributed opposite to each other along its extension direction. The first end face 114 includes the first sub-end face 1161 and the third sub-end face 1171, and a valve body air inlet 112 is formed between the first sub-end face 1161 and the third sub-end face 1171. The second end face 115 includes the second sub-end face 1162 and the fourth sub-end face 1172, and a valve body air outlet 113 is formed between the second sub-end face 1162 and the fourth sub-end face 1172.

[0050] The inclination of the length direction of the first air duct 111 relative to the first end face 114 and / or the second end face 115 can be achieved by having at least one of the first side plate 116 and the second side plate 117 extend in a direction relative to the first end face 114 and / or the second end face 115. Converting the inclination of the length direction of the first air duct 111 relative to the first end face 114 and / or the second end face 115 into an inclination of the extension direction of at least one of the first side plate 116 and the second side plate 117 forming the first air duct 111 relative to the first end face 114 and / or the second end face 115, allows the inclination angle of the first air duct 111 to be changed simply by adjusting the inclination angle of the first side plate 116 and / or the second side plate 117 when designing the check valve 10. This simplifies the structural design of the check valve 10 and makes manufacturing more convenient.

[0051] Optionally, the angle between the extension direction of the first side plate 116 and the first end face 114 is smaller than the angle between the extension direction of the second side plate 117 and the first end face 114. That is, the inclination angle of the first side plate 116 and the inclination angle of the second side plate 117 are not equal. When assembling the range hood 1, the first side plate 116 of the check valve 10 can be set on the side of the volute tongue 2311 of the volute 231, and the second side plate 117 can be set on the side of the volute 231 that is away from the volute tongue 2311. This makes the structural compatibility between the check valve 10 and the volute 231 higher, and the oil fumes in the volute 231 can flow more smoothly into the check valve 10. Furthermore, the definition of the angle between the extension direction of the first side plate 116, the extension direction of the second side plate 117, and the first end face 114 allows the first air duct 111 to be roughly formed such that the diameter of the valve body air inlet 112 is smaller than the diameter of the valve body air outlet 113, so that the oil fumes can flow more smoothly toward the valve body air outlet 113 within the check valve 10.

[0052] Optionally, in this embodiment, when the angle between the second side plate 117 and the first end face 114 is less than 30°, the height dimension of the outer casing 110 perpendicular to the first end face 114 can be extended to improve the flow state of oil fumes within the first air duct 111; for example, the height dimension of the outer casing 110 perpendicular to the first end face 114 can be adjusted from 100mm to 130mm; or, when the angle between the second side plate 117 and the first end face 114 is less than 30°, the first side plate 116 and the second side plate 117 can be redesigned so that the angle between the second side plate 117 and the first end face 114 is greater than 30°. When the angle between the second side plate 117 and the first end face 114 is greater than or equal to 30° and less than 50°, the flow guiding assembly 130 may include two or more flow guiding plates 131 extending along the length direction of the first air duct 111. When the angle between the second side plate 117 and the first end face 114 is greater than or equal to 50° and less than 70°, the flow guiding assembly 130 may include a flow guide 131 extending along the length direction of the first air duct 111. When the angle between the second side plate 117 and the first end face 114 is greater than or equal to 70°, the flow guide 131 may not be required.

[0053] Optionally, please refer to Figure 5The outer casing 110 also includes a third side plate 118 and a fourth side plate 119. Both the third side plate 118 and the fourth side plate 119 are connected between the first side plate 116 and the second side plate 117, and are distributed on opposite sides of the first side plate 116. The third side plate 118 has a fifth sub-end face and a sixth sub-end face distributed opposite to each other along its extension direction. The fourth side plate 119 has a seventh sub-end face and an eighth sub-end face distributed opposite to each other along its extension direction. The first end face 114 also includes the fifth and seventh sub-end faces, and the second end face 115 also includes the sixth and eighth sub-end faces. Designing the outer casing 110 as being generally formed by four side plates simplifies its structure and reduces production costs.

[0054] The third side plate 118 can extend in a direction perpendicular to the first end face 114 and / or the second end face 115, and the fourth side plate 119 can extend in a direction perpendicular to the first end face 114 and / or the second end face 115. The third side plate 118 and the fourth side plate 119 can be respectively set to correspond to the front side plate and the rear side plate of the volute 231, so that the oil fumes in the volute 231 can flow smoothly into the check valve 10.

[0055] Optionally, the first side plate 116, the second side plate 117, the third side plate 118, and the fourth side plate 119 are all approximately quadrilateral in shape, and adjacent side plates can be assembled by joining them along their boundary lines. Alternatively, the first side plate 116, the second side plate 117, the third side plate 118, and the fourth side plate 119 can also be formed by bending a single sheet of material to simplify the assembly process and improve efficiency. Optionally, the first side plate 116, the second side plate 117, the third side plate 118, and the fourth side plate 119 can all be thin-plate structures to reduce material usage, decrease the weight of the check valve 10, and facilitate assembly.

[0056] Optionally, the check valve assembly 120 includes two or more valve plates 121, which are respectively configured to correspond one-to-one with two or more sub-ducts 1111. When the check valve assembly 120 is in the first state, each valve plate 121 closes the corresponding sub-duct 1111. When the check valve assembly 120 is in the second state, each valve plate 121 opens the corresponding sub-duct 1111. Each valve plate 121 is rotatably connected to the housing 110 to realize the switching of the check valve assembly 120 between the first state and the second state.

[0057] When the range hood 1 is in use, the fan 230 operates, causing the fumes to flow. Driven by the fumes, the valve plate 121 can rotate relative to the outer casing 110, putting the check valve assembly 120 in a second state. This opens the sub-duct 1111, allowing the fumes to flow smoothly into the exhaust duct, and then be transported to the public flue or outdoors. Specifically, when the fan 230 is operating, the air pressure on the side of the valve plate 121 facing the volute 231 is greater than the air pressure on the side facing the exhaust duct 30. This causes the valve plate 121 to rotate under the pressure of the air, opening the sub-duct 1111 and allowing the fumes to flow from the volute 231 into the exhaust duct 30.

[0058] When the range hood 1 is not in use, the valve plate 121 can rotate relative to the outer shell 110 under its own gravity and put the check valve assembly 120 in the first state, so that each sub-duct 1111 is closed, and the oil fumes in the public duct or external oil fumes cannot flow back into the main body of the range hood 20 or even into the kitchen through the exhaust pipe.

[0059] Optionally, the outer contour of the valve plate 121 can be adapted to the inner contour of the corresponding position on the sub-duct 1111, or the outer contour of the valve plate 121 can be slightly larger than the inner contour of the corresponding position on the sub-duct 1111, so that after the valve plate 121 rotates relative to the outer shell 110 to the corresponding position on the sub-duct 1111 under its own gravity, it cannot continue to move downward, thereby enabling the check assembly 120 to remain in the first state.

[0060] Optionally, the diameter of the outlet 113 of each sub-duct 1111 at the corresponding valve body can not be exactly the same. Therefore, the size of the valve plate 121 corresponding to each sub-duct 1111 can also be different, so that the size of each valve plate 121 can be adapted to the size of its corresponding sub-duct 1111. The size difference of the valve plate 121 can further result in a difference in the weight of each valve plate 121. Thus, the force exerted by each valve plate 121 on the fumes when pushed by the fumes within the corresponding sub-duct 1111 will be different, and the gravity of the valve plate 121 can further improve the flow state of the fumes within the sub-duct 1111.

[0061] Alternatively, when the cross-section of the first air duct 111 of the housing 110 is approximately rectangular, for example, when the housing 110 is assembled from approximately four side panels, please refer to... Figure 5 The rotation axis of valve plate 121 can be approximately parallel to the long side of the rectangle. Please refer to [link / reference]. Figures 2 to 4 The rotation axis of the valve plate 121 can also be approximately parallel to the short side of the rectangle, but this application embodiment does not limit this.

[0062] Optionally, the housing 110 may be provided with a stop portion 1110 corresponding to each valve piece 121. When the check assembly 120 is in the first state, each valve piece 121 abuts against the corresponding stop portion 1110, so that the stop portion 1110 can hold the check assembly 120 in the first state. Optionally, the end face of at least one stop portion 1110 facing the corresponding valve piece 121 may be a hemispherical surface. When the check assembly 120 is in the first state, the valve piece 121 can abut against the hemispherical surface of the corresponding stop portion 1110 to reduce wear between the valve piece 121 and the stop portion 1110. Optionally, the end face of at least one stop portion 1110 facing the corresponding valve piece 121 may be provided with an elastic layer such as foam. When the check assembly 120 is in the first state, the valve piece 121 can abut against the elastic layer of the corresponding stop portion 1110 to reduce wear between the valve piece 121 and the stop portion 1110.

[0063] Optionally, the check valve 10 further includes an oil receiving plate 140. The oil receiving plate 140 is arranged around the valve body outlet 113 of the outer casing 110 and connected to the outer casing 110. An oil receiving groove 141 is formed on the side of the oil receiving plate 140 facing away from the valve body inlet 112 of the outer casing 110. An oil leakage hole 142 is also formed on the oil receiving plate 140, which communicates with both the oil receiving groove 141 and the first air duct 111. Thus, combined with Figure 6 and Figure 7 When the exhaust pipe 30 is connected to the check valve 10, one end of the exhaust pipe 30 can be placed in the oil receiving groove 141 of the check valve 10, so that the oil fumes accumulated on the inner wall of the exhaust pipe 30 can flow into the oil receiving groove 141 along the exhaust pipe 30, and then flow into the first air duct 111 and the range hood 1 through the oil leakage hole 142, and finally gather in the oil cup of the range hood 1 for centralized treatment.

[0064] Optionally, the oil receiving plate 140 may include an inner peripheral plate 143, an outer peripheral plate 144, and a bottom plate 145. The inner peripheral plate 143 is arranged around the valve body outlet 113 of the outer casing 110 and connected to the outer casing 110. The outer peripheral plate 144 is arranged around the periphery of the inner peripheral plate 143 and forms an oil receiving groove 141 between the two plates. The bottom plate 145 is arranged around the periphery of the inner peripheral plate 143 and is located on the side of the outer peripheral plate 144 near the valve body inlet 112. The bottom plate 145 connects the inner peripheral plate 143 and the outer peripheral plate 144. This makes the cross-section of the oil receiving groove 141 approximately U-shaped, which facilitates assembly with the exhaust duct 30. The inner peripheral plate 143 may be provided with an oil leakage hole 142.

[0065] Optionally, the oil receiving plate 140 can be generally cylindrical. For example, the inner peripheral plate 143 and the outer peripheral plate 144 of the oil receiving plate 140 can both extend in a direction that is generally perpendicular to the first end face 114 without being inclined, so that the check valve 10 can be connected to the exhaust pipe 30 through the oil receiving plate 140, making the connection more convenient.

[0066] Optionally, the dimension of the oil leakage hole 142 along the length of the first air duct 111 can be greater than or equal to 5 mm and less than or equal to 15 mm, so that the size of the oil leakage hole 142 is optimal, which can avoid the oil leakage hole 142 being too large and prone to air leakage or the oil leakage hole 142 being too small and prone to oil sealing. Optionally, the oil leakage hole 142 can be roughly oriented, circular, elliptical, trapezoidal, or any other shape, and the embodiments of this application do not limit it in this way.

[0067] Please refer to it again. Figure 1 This application embodiment also provides a range hood 1, which includes the aforementioned check valve 10, range hood body 20 and exhaust pipe 30. The exhaust pipe 30 has a second air duct 310 and an air inlet 320 and an air outlet 330 connected to the second air duct 310. The exhaust pipe 30 is connected to the check valve 10 and the air inlet 320 is connected to the valve body air outlet 113.

[0068] Optionally, please refer to [the relevant document / reference]. Figure 6 The range hood 1 also includes a connector 40, which is sleeved around the exhaust pipe 30 and the check valve 10, and is connected to both the exhaust pipe 30 and the check valve 10. Sleeving the connector 40 around the exhaust pipe 30 and the check valve 10 and connecting it to both simplifies the assembly process compared to directly connecting the exhaust pipe 30 and the check valve 10 by spot welding, and makes disassembly and assembly easier. Furthermore, it improves the sealing performance at the connection between the exhaust pipe 30 and the check valve 1, thus enhancing the overall sealing performance of the range hood 1 and improving the user experience.

[0069] Optionally, the connector 40 can be detachably connected to at least one of the exhaust pipe 30 and the check valve 10 to facilitate maintenance, repair and other operations.

[0070] Optionally, please refer to [the relevant document / reference]. Figure 7 The connector 40 includes a first connecting plate 410, a second connecting plate 420, and a third connecting plate 430. The first connecting plate 410 is arranged around the periphery of the oil receiving plate 140. The second connecting plate 420 is located on the side of the oil receiving plate 140 away from the exhaust pipe 30, with one end connected to the first connecting plate 410 and the other end extending towards the outer casing 110 and fitting against the surface of the oil receiving plate 140 away from the exhaust pipe 30. The third connecting plate 430 is located on the side of the oil receiving plate 140 away from the valve body air inlet 112, with one end connected to the first connecting plate 410 and the other end extending towards the exhaust pipe 30 and abutting against the exhaust pipe 30. The connector 40 has an approximately inverted U-shaped cross-section and wraps around the oil receiving plate 140, which can strengthen the connection stability between the connector 40 and the exhaust pipe 30 and the check valve 10, and improve the sealing performance at the connection between the exhaust pipe 30 and the check valve 10.

[0071] Optionally, the second connecting plate 420 may be located on the side of the base plate 145 near the valve body air inlet 112 and fit against the base plate 145. The second connecting plate 420 may also abut against the outer shell 110 or the inner peripheral plate 143 to improve the connection stability and sealing of the connector 40.

[0072] In one exemplary embodiment, the first connecting plate 410 may optionally include a first sub-plate 411 that is arranged around the periphery of the oil receiving plate 140 and connected to the second connecting plate 420, and a second sub-plate 412 that is arranged around the periphery of the oil receiving plate 140 and connected to the third connecting plate 430. The first sub-plate 411 is provided with one of a first engaging member 441 and a first fastening member 442, and the second sub-plate 412 is provided with the other of the first engaging member 441 and the first fastening member 442. The first engaging member 441 and the first fastening member 442 are detachably connected.

[0073] Optionally, the end of the first sub-plate 411 away from the second connecting plate 420 may be provided with a first engaging member 441, and the end of the second sub-plate 412 away from the third connecting plate 430 may be provided with a first fastening member 442. The first engaging member 441 may include a first engaging protrusion, and the first fastening member 442 may include a first engaging groove, with the first engaging protrusion engaged in the first engaging groove.

[0074] Optionally, the second sub-plate 412 can be spaced apart from the oil receiving plate 140. The side of the second sub-plate 412 facing the oil receiving plate 140 can be provided with a first fastening member 442. The first sub-plate 411 can be located between the second sub-plate 412 and the oil receiving plate 140 and abut against the oil receiving plate 140 at least at one end away from the second connecting plate 420. The side of the first sub-plate 411 facing away from the oil receiving plate 140 can be provided with a first locking member 441, so that after the first sub-plate 411 and the second sub-plate 412 are connected, the second sub-plate 412 will also abut against the oil receiving plate 140, which can improve the installation stability of the connector 40.

[0075] In another exemplary scheme, please refer to Figure 8 and Figure 9 Optionally, the first connecting plate 410 is provided with one of a second locking member 443 and a second fastening member 444 on the side facing the oil receiving plate 140, and the oil receiving plate 140 is provided with the other of a second locking member 443 and a second fastening member 444 on the side facing the first connecting plate 410, and the second locking member 443 and the second fastening member 444 are detachably connected.

[0076] Optionally, the first connecting plate 410 may be provided with a second fastening member 444, and the oil receiving plate 140 may be provided with a second locking member 443. The second fastening member 444 may include two spaced-apart second locking protrusions, and the second locking member 443 may include a third locking protrusion locked between the two second locking protrusions, thus forming a labyrinth-shaped sealing structure between the connecting member 40 and the oil receiving plate 140. This enhances the sealing effect at the connection between the check valve 10 and the exhaust pipe 30.

[0077] Optionally, please refer to [the relevant document / reference]. Figure 8 The connector 40 includes a first part 450 and a second part 460, which are sequentially distributed around the circumference of the outer casing 110 and together form a ring around the periphery of the outer casing 110. The second part 460 is detachably connected to the first part 450. Disassembling the connector 40 into the first part 450 and the second part 460 facilitates the assembly of the connector 40 with the check valve 10 and the smoke exhaust pipe 30, and facilitates maintenance and other operations.

[0078] Optionally, please refer to [the relevant document / reference]. Figure 7 The range hood 1 also includes a first sealing ring 50, which includes a first sealing part 510 and a second sealing part 520 connected to the first sealing part 510. The first sealing part 510 is located in the oil receiving groove 141, and the second sealing part 520 is located on the side of the oil receiving plate 140 facing away from the air inlet 112 of the valve body and abuts against the oil receiving plate 140 and the connecting member 40. Designing the first sealing ring 50 to include the first sealing part 510 and the second sealing part 520 facilitates the assembly of the first sealing ring 50 with the connecting member 40 and the oil receiving plate 140 while achieving a seal.

[0079] Optionally, a first step 340 is formed on the inner wall of the exhaust duct 30. One end of the exhaust duct 30 is located in the oil receiving groove 141 of the oil receiving plate 140, and the first step 340 overlaps the end face of the oil receiving plate 140 away from the air inlet 112 of the valve body, so as to limit the depth of the exhaust duct 30 extending into the oil receiving groove 141 by the first step 340. For example, when the first step 340 overlaps the open end face of the oil receiving plate 140, there can be a certain gap between the exhaust duct 30 and the bottom of the oil receiving groove 141, so that the oil fumes on the exhaust duct 30 can flow smoothly into the oil receiving groove 141.

[0080] Optionally, the first sealing portion 510 of the first sealing ring 50 may be located within the oil receiving groove 141 and surrounding the periphery of the exhaust duct 3. Optionally, a second step 350 is formed on the outer wall surface of the exhaust duct 30, and the second sealing portion 520 of the first sealing ring 50 may be partially disposed at the second step 350 and abut against the wall surface of the exhaust duct 30 forming the second step 350, thereby enhancing the installation stability of the first sealing ring 50. Optionally, the cross-section of the first sealing ring 50 may be approximately T-shaped.

[0081] Optionally, please refer to Figure 10 The exhaust duct 30 may include a first flat pipe 361 connected to the check valve 10, a second flat pipe 362 spaced from and angled to the first flat pipe 361, a bend 363 connecting the first flat pipe 361 and the second flat pipe 362, and a square-to-round check pipe 364 connecting the side of the second flat pipe 362 away from the bend 363. The first flat pipe 361 and the second flat pipe 362 may be arranged at a 90° angle. The diameter of the first flat pipe 361 may be smaller than the diameter of the second flat pipe 362. The exhaust duct 30 may also include a reducer 365 connecting the first flat pipe 361 and the second flat pipe 362. The reducer 365 may be connected between the bend 363 and the first flat pipe 361, or between the bend 363 and the second flat pipe 362. Please refer to [link / reference]. Figure 11 A guide plate 3631 can be installed inside the bend 363 to guide the flow of oil fumes and accelerate the flow speed of oil fumes.

[0082] Please see Figure 12 A sealing structure 370 can be provided between two adjacent pipes of the exhaust pipe 30. The sealing structure 370 includes a second sealing ring 371, a third engaging member 372 and a third fastening member 373 respectively provided on the two pipes. When the two adjacent pipes are connected by the third engaging member 372 and the third fastening member 373, the second sealing ring 371 is squeezed and deformed, which compresses the pipe to achieve a sealing effect.

[0083] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0084] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Therefore, any equivalent variations made in accordance with the claims of this application shall still fall within the scope of this application.

Claims

1. A check valve, characterized in that, The check valve is used on a range hood, and the check valve includes: The outer casing has a first air duct and a valve body air inlet and a valve body air outlet connected to the first air duct. The outer casing is used to be installed on the main body of the range hood, and the valve body air inlet is used to connect with the air outlet of the main body of the range hood. A check valve assembly is connected to the housing. The check valve assembly has a first state and a second state. In the first state, the check valve assembly closes the first air duct. In the second state, the check valve assembly opens the first air duct. A flow guiding component includes one or more flow guiding plates, which are disposed in the first air duct and extend along the length direction of the first air duct. The flow guiding plates divide the first air duct into two or more sub-air ducts, each of which extends along the length direction of the first air duct. The diameter of the air inlet of the valve body in the first air duct is smaller than the diameter of the air outlet of the valve body. The first air duct includes a first channel section near the air inlet of the valve body and a second channel section near the air outlet of the valve body. The flow guiding assembly includes three or more flow guiding vanes, and the three or more flow guiding vanes are divided into: One or more first guide vanes are located in the first channel segment and extend along the length of the first air duct, and the two opposite plates of the first guide vanes respectively form the sub-air ducts; Two or more second guide vanes are located in the second channel section and extend along the length of the first air duct. The number of second guide vanes is greater than the number of first guide vanes. Sub-air ducts are formed between two adjacent second guide vanes and between the second guide vanes located on the side and the inner wall surface of the outer shell. The diameter of each sub-duct near the air inlet of the valve body is smaller than the diameter near the air outlet of the valve body.

2. The check valve according to claim 1, characterized in that, The airflow guiding assembly includes one airflow guiding plate, which extends along the length of the first air duct, and each of the two opposite surfaces of the airflow guiding plate forms a sub-air duct between itself and the inner wall surface of the outer casing; or The airflow guiding assembly includes two or more airflow guiding plates, each of which extends along the length direction of the first air duct and is spaced apart from each other in a direction perpendicular to the length direction of the first air duct. Sub-air ducts are formed between two adjacent airflow guiding plates and between the airflow guiding plate located on the side and the inner wall surface of the outer shell.

3. The check valve according to claim 1, characterized in that, The outer casing has a first end face and a second end face opposite to each other. The first air duct passes through the first end face and the second end face and forms the valve body air inlet at the first end face and the valve body air outlet at the second end face. The length direction of the first air duct is inclined relative to the first end face and / or the second end face.

4. The check valve according to claim 3, characterized in that, The outer casing includes: The first side plate has a first sub-end face and a second sub-end face that are distributed opposite to each other along its extension direction; The second side plate is spaced apart from the first side plate along a first direction, which intersects the extension direction of the first side plate. The second side plate and the first side plate form the first air duct. The second side plate has a third sub-end face and a fourth sub-end face distributed opposite to each other along its extension direction. The first end face includes the first sub-end face and the third sub-end face, and the valve body air inlet is formed between the first sub-end face and the third sub-end face. The second end face includes the second sub-end face and the fourth sub-end face, and the valve body air outlet is formed between the second sub-end face and the fourth sub-end face. The extension direction of at least one of the first side plate and the second side plate is inclined relative to the first end face and / or the second end face.

5. The check valve according to claim 4, characterized in that, The angle between the extending direction of the first side plate and the first end face is smaller than the angle between the extending direction of the second side plate and the first end face; and / or The outer casing also includes a third side plate and a fourth side plate, both of which are connected between the first side plate and the second side plate. The third side plate and the fourth side plate are distributed on opposite sides of the first side plate. The third side plate has a fifth sub-end face and a sixth sub-end face distributed opposite to each other along its extension direction. The fourth side plate has a seventh sub-end face and an eighth sub-end face distributed opposite to each other along its extension direction. The first end face also includes the fifth sub-end face and the seventh sub-end face, and the second end face also includes the sixth sub-end face and the eighth sub-end face.

6. The check valve according to claim 1, characterized in that, The check valve component includes: Two or more valve plates are provided, and the two or more valve plates are correspondingly arranged with two or more sub-air ducts. When the check assembly is in the first state, each valve plate closes the corresponding sub-air duct. When the check assembly is in the second state, each valve plate opens the corresponding sub-air duct. Each valve plate is rotatably connected to the housing to realize the switching of the check assembly between the first state and the second state.

7. The check valve according to claim 1, characterized in that, Also includes: An oil receiving plate is arranged around the air outlet of the valve body and connected to the outer shell. An oil receiving groove is formed on the side of the oil receiving plate away from the air inlet of the valve body. An oil leakage hole is also formed on the oil receiving plate, which is connected to the oil receiving groove and the first air duct of the outer shell.

8. A range hood, characterized in that, include: The check valve according to any one of claims 1 to 6; The main body of the smoke hood; The smoke exhaust duct has a second air duct and a pipe inlet and a pipe outlet connected to the second air duct. The smoke exhaust duct is connected to the check valve and the pipe inlet is connected to the valve body outlet.

9. The range hood according to claim 8, characterized in that, The check valve also includes: An oil receiving plate is arranged around the outer periphery of the valve body air outlet of the outer shell and connected to the outer shell. An oil receiving groove is formed on the side of the oil receiving plate facing away from the valve body air inlet of the outer shell. An oil leakage hole is also formed on the oil receiving plate, which is connected to the oil receiving groove and the first air duct of the outer shell. One end of the exhaust pipe is located in the oil receiving groove.

10. The range hood according to claim 9, characterized in that, It also includes a connector that connects the exhaust pipe and the check valve, the connector comprising: The first connecting plate is arranged around the periphery of the oil receiving plate; The second connecting plate is located on the side of the oil receiving plate away from the exhaust pipe and one end is connected to the first connecting plate, while the other end extends toward the outer shell and is in contact with the surface of the oil receiving plate away from the exhaust pipe. The third connecting plate is located on the side of the oil receiving plate away from the air inlet of the valve body, with one end connected to the first connecting plate and the other end extending towards the exhaust pipe and abutting against the exhaust pipe.

11. The range hood according to claim 10, characterized in that, The first connecting plate includes a first sub-plate surrounding the oil receiving plate and connected to the second connecting plate, and a second sub-plate surrounding the oil receiving plate and connected to the third connecting plate. The first sub-plate is provided with one of a first engaging component and a first fastening component, and the second sub-plate is provided with the other of the first engaging component and the first fastening component. The first engaging component and the first fastening component are detachably connected; or The first connecting plate has one of a second engaging component and a second fastening component on the side facing the oil receiving plate, and the oil receiving plate has the other of a second engaging component and a second fastening component on the side facing the first connecting plate. The second engaging component and the second fastening component are detachably connected.

12. The range hood according to claim 10 or 11, characterized in that, The range hood further includes a first sealing ring, which comprises a first sealing portion and a second sealing portion connected to the first sealing portion. The first sealing portion is located within the oil receiving groove, and the second sealing portion is disposed on the side of the oil receiving plate facing away from the air inlet of the valve body and abuts against the oil receiving plate and the connecting piece; and / or The connector includes a first part and a second part, the second part and the first part are distributed sequentially around the circumference of the outer shell and are arranged together with the first part around the periphery of the outer shell, and the second part and the first part are detachably connected.

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