A range hood
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-23
- Publication Date
- 2026-08-11
AI Technical Summary
[0011]风柜的排风管插接于止回阀进风端的定位槽内，即定位槽遮挡了排风管的端部，定位槽处的油液在重力下会朝排风管内流动，即使少量的油液进入至排风管与定位槽的槽壁之间，也会被紧密夹持于排风管与定位槽的槽壁之间的密封垫圈阻挡后朝排风管内流动，使该吸油烟机在止回阀和风柜之间形成的烟道处仅具有一处密封，就能有效降低渗油漏油发生的几率。且排风管插接于定位槽内，方便止回阀与风柜之间的定位组装，有效降低止回阀的进风端和排风管之间的段差，即提高止回阀的进风端和排风管之间的同心度，降低因段差而产生的风噪，且降低因段差产生的压力差而导致的渗油漏油风险。
Smart Images
Figure CN224622931U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of household appliance technology, and in particular to a range hood. Background Technology
[0002] A range hood is a kitchen appliance that purifies the kitchen environment. Installed above the stove, it quickly removes waste from combustion and harmful fumes produced during cooking, expelling them outdoors. It also condenses and collects these fumes, reducing pollution, purifying the air, and providing safety features such as protection against toxic substances and explosions.
[0003] Currently, to prevent cooking fumes from flowing back into the range hood and entering the kitchen, range hoods are typically equipped with check valves. Related technologies, such as... Figure 1 and Figure 2 As shown, the range hood includes a housing 10, a blower 20, and a check valve 30. The housing 10 has a top plate 11. The blower 20 is located below the top plate 11, and the check valve 30 is located above the top plate 11. Both the blower 20 and the check valve 30 are fixed to the top plate 11 by flange connection. Sealing gaskets 40 are sandwiched between the exhaust flange face of the blower 20 and the top plate 11, and between the inlet flange face of the check valve 30 and the top plate 11. That is, the flue formed between the blower 20 and the check valve 30 has two seals. The exhaust flange face of the blower 20, the top plate 11, and the inlet flange face of the check valve 30 are all flat. Oil is more likely to diffuse in flat surfaces. There is a risk of oil leakage at both seals, and the probability of oil leakage is relatively high. Utility Model Content
[0004] The technical problem solved by this utility model is to provide a range hood that can effectively solve the problem of oil leakage between the blower and the check valve.
[0005] The above-mentioned technical problems are solved by the following technical solutions:
[0006] A range hood, comprising:
[0007] A check valve, wherein the air inlet end of the check valve is provided with a positioning groove;
[0008] An air handling unit, wherein the air handling unit is provided with an exhaust pipe, which is inserted into the positioning groove;
[0009] A sealing gasket is disposed in the positioning groove, and the sealing gasket is tightly clamped between the exhaust pipe and the groove wall of the positioning groove.
[0010] The range hood described in this utility model has the following advantages compared with the prior art:
[0011] The exhaust pipe of the blower unit is inserted into the positioning groove at the air inlet end of the check valve. This positioning groove blocks the end of the exhaust pipe, allowing oil in the positioning groove to flow into the exhaust pipe under gravity. Even if a small amount of oil enters between the exhaust pipe and the groove wall, it will be blocked by the sealing gasket tightly clamped between them and flow into the exhaust pipe. This ensures that the range hood has only one seal at the flue formed between the check valve and the blower unit, effectively reducing the chance of oil leakage. Furthermore, the exhaust pipe's insertion into the positioning groove facilitates the positioning and assembly of the check valve and the blower unit, effectively reducing the step difference between the check valve's air inlet end and the exhaust pipe. This improves the concentricity between the check valve's air inlet end and the exhaust pipe, reducing wind noise caused by the step difference and lowering the risk of oil leakage due to pressure differences caused by the step difference.
[0012] In one embodiment, the air inlet end of the check valve is provided with an outer ring plate and an inner ring plate, the inner ring plate is located inside the outer ring plate, and the positioning groove is formed between the outer ring plate and the inner ring plate. The length L1 of the outer ring plate is not equal to the length L2 of the inner ring plate.
[0013] In one embodiment, the length L1 of the outer ring plate is greater than the length L2 of the inner ring plate.
[0014] In one embodiment, the length L2 of the inner ring plate is ≥ 3 mm.
[0015] In one embodiment, a first gap is formed between the inner peripheral wall of the outer ring plate and the outer peripheral wall of the exhaust pipe; and / or, a second gap is formed between the outer peripheral wall of the inner ring plate and the inner peripheral wall of the exhaust pipe.
[0016] In one embodiment, the inner peripheral wall of the inner ring plate has a guide slope, which is inclined from one end near the bottom of the positioning groove to the other end away from the bottom of the positioning groove toward the outer peripheral wall of the inner ring plate.
[0017] In one embodiment, the range hood further includes a fastener that passes through the outer ring plate and is threadedly connected to the exhaust pipe.
[0018] In one embodiment, the sealing gasket is tightly clamped between the end face of the exhaust pipe and the bottom wall of the positioning groove.
[0019] In one embodiment, the width B1 of the sealing gasket is greater than the wall thickness B2 of the exhaust pipe.
[0020] In one embodiment, the sealing gasket has a concave surface at one end near the blower, and the end face of the exhaust pipe abuts against the concave surface; or, the sealing gasket has a groove at one end near the blower, and the exhaust pipe is inserted into the groove. Attached Figure Description
[0021] Figure 1 A partial structural cross-sectional view of a range hood provided for the purposes of existing technology;
[0022] Figure 2 Provided by existing technology Figure 1 Enlarged view of point A in the middle;
[0023] Figure 3 A partial structural cross-sectional view of the range hood provided by this utility model;
[0024] Figure 4 Provided by this utility model Figure 3 Enlarged view of point B in the middle;
[0025] Figure 5 A partial structural cross-sectional view of one embodiment of the sealing gasket provided by this utility model;
[0026] Figure 6 A cross-sectional view of the check valve assembled with a sealing gasket provided by this utility model;
[0027] Figure 7 Provided by this utility model Figure 6 Enlarged view of point C in the middle;
[0028] Figure 8 An exploded view of the disassembled check valve and sealing ring provided by this utility model;
[0029] Figure 9 This is a schematic diagram of the structure of the range hood provided by this utility model;
[0030] Figure 10 This is a cross-sectional view of the range hood provided by this utility model.
[0031] Label Explanation:
[0032] 10. Box base; 11. Top plate; 20. Air handling unit; 30. Check valve; 40. Sealing gasket;
[0033] 100. Check valve; 110. Positioning groove; 111. Outer ring plate; 1111. First through hole; 112. Inner ring plate; 1121. Guide slope;
[0034] 200. Air handling unit; 210. Exhaust duct; 211. First flange hole;
[0035] 300, sealing gasket; 310, concave surface; 320, groove;
[0036] 410. First gap; 420. Second gap;
[0037] 500, base; 510, top plate. Detailed Implementation
[0038] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0039] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0040] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0041] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0042] Reference Figures 3 to 8 As shown, this embodiment provides a range hood, which includes a check valve 100, a fan housing 200, and a sealing gasket 300.
[0043] Specifically, the air inlet end of the check valve 100 is provided with a positioning groove 110; the air handling unit 200 is provided with an exhaust pipe 210, which is inserted into the positioning groove 110; the sealing gasket 300 is provided in the positioning groove 110, and the sealing gasket 300 is tightly clamped between the exhaust pipe 210 and the groove wall of the positioning groove 110.
[0044] In this embodiment, the exhaust pipe 210 of the fan cabinet 200 is inserted into the positioning groove 110 at the air inlet end of the check valve 100. That is, the positioning groove 110 blocks the end of the exhaust pipe 210. The oil in the positioning groove 110 will flow into the exhaust pipe 210 under gravity. Even if a small amount of oil enters between the exhaust pipe 210 and the groove wall of the positioning groove 110, it will be blocked by the sealing gasket 300 tightly clamped between the exhaust pipe 210 and the groove wall of the positioning groove 110 and flow into the exhaust pipe 210. This ensures that the range hood has only one seal at the flue formed between the check valve 100 and the fan cabinet 200, which can effectively reduce the probability of oil seepage and leakage. Furthermore, the exhaust pipe 210 is inserted into the positioning groove 110, which facilitates the positioning and assembly between the check valve 100 and the air handling unit 200, effectively reducing the step difference between the air inlet end of the check valve 100 and the exhaust pipe 210, that is, improving the concentricity between the air inlet end of the check valve 100 and the exhaust pipe 210, reducing the wind noise caused by the step difference, and reducing the risk of oil leakage caused by the pressure difference.
[0045] In some embodiments, the sealing gasket 300 is tightly clamped between the end face of the exhaust pipe 210 and the bottom wall of the positioning groove 110, facilitating assembly and providing a good sealing effect. In other embodiments, the sealing gasket 300 is tightly clamped between the inner peripheral wall of the exhaust pipe 210 and the side wall of the positioning groove 110, providing a good sealing effect.
[0046] In one feasible implementation, such as Figure 3 and Figure 4 As shown, the width B1 of the sealing gasket 300 is greater than the wall thickness B2 of the exhaust pipe 210, which facilitates the processing of the sealing gasket 300. For example, taking the sealing gasket 300 tightly clamped between the end face of the exhaust pipe 210 and the bottom wall of the positioning groove 110, the projection of the end face of the exhaust pipe 210 is located on the sealing gasket 300, effectively ensuring the stability of the end face of the exhaust pipe 210 against the sealing gasket 300, resulting in a good sealing effect and facilitating the positioning and assembly between the sealing gasket 300 and the exhaust pipe 210. Of course, the width B1 of the sealing gasket 300 and the wall thickness B2 of the exhaust pipe 210 can also be equal, or the width B1 of the sealing gasket 300 can be less than the wall thickness B2 of the exhaust pipe 210; this embodiment does not impose any limitations.
[0047] In some embodiments, such as Figure 5As shown, the width B1 of the sealing gasket 300 is greater than the wall thickness B2 of the exhaust pipe 210, and the end of the sealing gasket 300 near the air handling unit 200 is provided with a concave surface 310. The end face of the exhaust pipe 210 abuts against the concave surface 310. When the exhaust pipe 210 is inserted into the positioning groove 110, the sealing gasket 300 will deform under the pressure of the end face of the exhaust pipe 210. The end face of the exhaust pipe 210 will slide towards the lowest point of the concave surface 310, effectively ensuring the stability of the end face of the exhaust pipe 210 tightly abutting the sealing gasket 300. Even if the exhaust pipe 210 is slightly deformed, the sealing gasket 300 still has a good sealing effect.
[0048] In other embodiments, such as Figure 4 As shown, the width B1 of the sealing gasket 300 is greater than the wall thickness B2 of the exhaust pipe 210. A groove 320 is provided at the end of the sealing gasket 300 near the air handling unit 200, and the exhaust pipe 210 is inserted into the groove 320 to achieve a better sealing effect. For example, the shape of the groove 320 can be V-shaped or U-shaped.
[0049] Of course, the end of the sealing gasket 300 near the air handling unit 200 can also be flat or other shapes, and this embodiment does not limit it.
[0050] For example, the sealing gasket 300 can be made of rubber, which has good elasticity, good sealing effect, and good oil resistance.
[0051] In this embodiment, reference is made to Figure 3 , Figure 6 and Figure 7 As shown, the air inlet end of the check valve 100 is provided with an outer ring plate 111 and an inner ring plate 112. The inner ring plate 112 is located inside the outer ring plate 111, and a positioning groove 110 is formed between the outer ring plate 111 and the inner ring plate 112. The length L1 of the outer ring plate 111 is not equal to the length L2 of the inner ring plate 112. When the exhaust pipe 210, the outer ring plate 111, and the inner ring plate 112 are slightly deformed or have low forming precision, it is more convenient for the exhaust pipe 210 to be inserted into the positioning groove 110 than when the length L1 of the outer ring plate 111 is equal to the length L2 of the inner ring plate 112, thus facilitating assembly. Furthermore, the unequal length L1 of the outer ring plate 111 and the length L2 of the inner ring plate 112 can save on the manufacturing cost of the check valve 100.
[0052] For example, the length L1 of the outer ring plate 111 is greater than the length L2 of the inner ring plate 112, which makes it easier for the exhaust pipe 210 to be inserted into the positioning groove 110, and the range hood looks more aesthetically pleasing.
[0053] For example, the length L2 of the inner ring plate 112 is greater than or equal to 3 mm, so that the oil in the check valve 100 can be introduced into the air handling unit 200 along the inner ring plate 112, preventing the oil in the check valve 100 from entering the positioning groove 110.
[0054] For example, the inner peripheral wall of the inner ring plate 112 has a guide slope 1121. The guide slope 1121 is inclined towards the outer peripheral wall of the inner ring plate 112 from one end near the bottom of the positioning groove 110 to the end away from the bottom of the positioning groove 110. The guide slope 1121 can reduce wind resistance and wind noise, facilitate the flow of flue gas into the check valve 100, and the guide slope 1121 further facilitates the introduction of oil in the check valve 100 into the air handling unit 200 along the inner ring plate 112. For example, the guide slope 1121 can be located at the end of the inner ring plate 112 away from the bottom of the positioning groove 110.
[0055] In one feasible implementation, a first gap 410 is formed between the inner peripheral wall of the outer ring plate 111 and the outer peripheral wall of the exhaust pipe 210 to facilitate the insertion of the exhaust pipe 210 into the positioning groove 110.
[0056] In one feasible implementation, a second gap 420 is formed between the outer peripheral wall of the inner ring plate 112 and the inner peripheral wall of the exhaust pipe 210 to facilitate the insertion of the exhaust pipe 210 into the positioning groove 110.
[0057] In this embodiment, the range hood also includes fasteners (not shown), and the check valve 100 is fastened to the fan housing 200 by means of the fasteners.
[0058] In some embodiments, such as Figure 4 and Figure 6 As shown, the fastener passes through the outer ring plate 111 and is threadedly connected to the exhaust pipe 210, simplifying the structure of the check valve 100 and the air handling unit 200 and saving manufacturing costs. In this embodiment, the length L1 of the outer ring plate 111 is greater than the length L2 of the inner ring plate 112, allowing the inner ring plate 112 to accommodate the fastener and avoid positional interference. Furthermore, with the fastener tightened, neither the outer ring plate 111 nor the exhaust pipe 210 is prone to deformation, effectively ensuring that the end face of the exhaust pipe 210 and the bottom surface of the positioning groove 110 are tightly against the sealing gasket 300, resulting in a good sealing effect. Multiple fasteners are provided around the outer ring plate 111. For example, the outer ring plate 111 is provided with a plurality of first through holes 1111 at intervals along the circumference, and the exhaust pipe 210 is provided with a plurality of first flange holes 211 at intervals along the circumference. The first through holes 1111, the first flange holes 211 and the fasteners are provided in a one-to-one correspondence. The fasteners pass through the corresponding first through holes 1111 and are threadedly connected to the corresponding first flange holes 211.
[0059] In other embodiments, the length L1 of the outer ring plate 111 is less than the length L2 of the inner ring plate 112. Fasteners pass through the exhaust pipe 210 and are threadedly connected to the inner ring plate 112. The outer ring plate 111 can accommodate the fasteners to avoid positional interference. Furthermore, with the fasteners tightened, neither the inner ring plate 112 nor the exhaust pipe 210 is prone to deformation, effectively ensuring that the end face of the exhaust pipe 210 and the bottom surface of the positioning groove 110 are tightly against the sealing gasket 300, resulting in a good sealing effect. Multiple fasteners are provided around the exhaust pipe 210. For example, the exhaust pipe 210 has multiple second through holes (not shown) spaced circumferentially, and the inner ring plate 112 has multiple second flanged holes (not shown) spaced circumferentially. The second through holes, second flanged holes, and fasteners are arranged in a one-to-one correspondence, with the fasteners passing through the corresponding second through holes and threadedly connected to the corresponding second flanged holes.
[0060] Of course, the check valve 100 can also be connected to the air handling unit 200 in other ways, which is not limited in this embodiment.
[0061] In this embodiment, reference is made to Figure 1 , Figure 9 and Figure 10 As shown, the range hood also includes a housing 500, a check valve 100 located outside the housing 500, an air handling unit 200 located inside the housing 500, and an exhaust pipe 210 extending outside the housing 500 and inserted into the positioning groove 110, which facilitates the disassembly and assembly of the check valve 100 and the exhaust pipe 210.
[0062] Specifically, the housing 500 has a top plate 510, a check valve 100 located above the top plate 510, an air handling unit 200 located below the top plate 510, and an exhaust pipe 210 passing through the top plate 510 and inserted into the positioning groove 110.
[0063] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.
[0064] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A range hood characterized by, include: Check valve (100), the air inlet end of the check valve (100) is provided with a positioning groove (110); A blower unit (200) is provided with an exhaust pipe (210), which is inserted into the positioning groove (110); A sealing gasket (300) is disposed in the positioning groove (110), and the sealing gasket (300) is tightly clamped between the exhaust pipe (210) and the groove wall of the positioning groove (110).
2. The hood according to claim 1, characterized in that, The air inlet end of the check valve (100) is provided with an outer ring plate (111) and an inner ring plate (112). The inner ring plate (112) is located inside the outer ring plate (111), and the positioning groove (110) is formed between the outer ring plate (111) and the inner ring plate (112). The length L1 of the outer ring plate (111) is not equal to the length L2 of the inner ring plate (112).
3. The hood according to claim 2, characterized in that, The length L1 of the outer ring plate (111) is greater than the length L2 of the inner ring plate (112).
4. The hood according to claim 2, characterized in that, The length L2 of the inner ring plate (112) is ≥3mm.
5. The hood according to claim 2, characterized in that, A first gap (410) is formed between the inner peripheral wall of the outer ring plate (111) and the outer peripheral wall of the exhaust pipe (210); and / or, a second gap (420) is formed between the outer peripheral wall of the inner ring plate (112) and the inner peripheral wall of the exhaust pipe (210).
6. The hood according to claim 2, characterized in that, The inner peripheral wall of the inner ring plate (112) has a guide slope (1121), which is inclined from one end near the bottom of the positioning groove (110) to the other end away from the bottom of the positioning groove (110) toward the outer peripheral wall of the inner ring plate (112).
7. The hood according to claim 2, characterized in that, The range hood also includes fasteners, which pass through the outer ring plate (111) and are threadedly connected to the exhaust pipe (210).
8. The hood according to claim 1, characterized in that, The sealing gasket (300) is tightly clamped between the end face of the exhaust pipe (210) and the bottom wall of the positioning groove (110).
9. The hood according to any one of claims 1-8, characterized in that, The width B1 of the sealing gasket (300) is greater than the wall thickness B2 of the exhaust pipe (210).
10. The hood according to claim 9, characterized in that, The sealing gasket (300) has a concave surface (310) at one end near the air handling unit (200), and the end face of the exhaust pipe (210) abuts against the concave surface (310); or, the sealing gasket (300) has a groove (320) at one end near the air handling unit (200), and the exhaust pipe (210) is inserted into the groove (320).