Range hood

Abstract

The utility model discloses a range hood which comprises a range hood body, an air outlet device and a smoke exhaust pipe, and the air outlet device comprises an air outlet cover connected to an air outlet of the range hood body; the air outlet pipe is a hose extending up and down and is connected with the air outlet cover; and the switching structure is of a bent hard structure, part of the switching structure is located below the suspended ceiling of the kitchen, and part of the switching structure is located above the suspended ceiling, so that the air outlet pipe is connected with the smoke exhaust pipe.

Description

Technical Field

[0001] This utility model relates to an oil fume purification device, and more particularly to an oil fume extractor. Background Technology

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. It can quickly remove waste from the stove and fumes produced during cooking and exhaust them outdoors, reducing pollution and purifying the air.

[0003] To reduce the space occupied in the kitchen and improve aesthetics, some ultra-thin range hoods have been developed. Examples include those disclosed in Chinese patent applications 202221695400.5 and 201921572496.4.

[0004] For this type of ultra-thin range hood, its air outlet system typically employs the following methods:

[0005] 1) Small-sized circular air outlet hoses result in a significant reduction in the air outlet area;

[0006] 2) Square air outlet hoses vibrate more at the bends, and the large bend angles make it easy for smoke to accumulate at the bends.

[0007] 3) Rigid square pipe with flexible hose adapter: Since the turning direction of the rigid air outlet pipe is determined after production, it is not universal and the installation and connection of the rigid smoke pipe is inconvenient. If a flexible hose adapter is added, the vibration at the adapter will be large, the noise will be large, the smoke exhaust resistance will be increased, and the flexible hose adapter will be inconvenient to fix.

[0008] Therefore, further improvements are needed. Utility Model Content

[0009] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a range hood whose air outlet device can reduce vibration and is easy to install and fix.

[0010] The technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows: a range hood, comprising a range hood body, an air outlet device, and a smoke exhaust pipe, characterized in that:

[0011] The air outlet device includes:

[0012] The exhaust hood connects to the air outlet of the range hood body;

[0013] The air outlet duct is a flexible hose extending vertically, connecting to the air outlet hood; and

[0014] The transition structure is a rigid, curved structure that is partially located below and partially above the kitchen ceiling, thus connecting the air outlet duct and the exhaust duct.

[0015] By using a flexible exhaust duct and a rigid adapter structure, it is easy to install and connect to the range hood body. The adapter structure is easy to fix and can reduce vibration and noise at bends, solving the problem of exhaust ducts being unable to bend due to insufficient ceiling space. The adapter structure also allows the exhaust device to be adapted to various installation directions, improving its versatility.

[0016] Furthermore, the inlet and outlet cross-sections of the air outlet hood and air outlet pipe are both rectangular, which ensures sufficient air outlet area.

[0017] Preferably, the adapter structure includes a first adapter and a second adapter, the first adapter being connected between the air outlet duct and the second adapter, the first adapter being used to extend from below the ceiling to above the ceiling, and the second adapter being used to be installed above the ceiling.

[0018] Preferably, to facilitate compatibility with air outlet pipes and smoke exhaust pipes, the inlet and outlet cross sections of the air outlet hood and air outlet pipe are both rectangular;

[0019] The first adapter has a first inlet connected to the air outlet duct and a first outlet connected to the second adapter, both of which have rectangular cross-sections.

[0020] The second adapter includes a second inlet connected to the first adapter and a second outlet connected to the exhaust pipe. The cross-section of the second inlet is rectangular, and the cross-section of the second outlet is circular.

[0021] Furthermore, the first adapter has a first inlet connected to the air outlet pipe and a first outlet connected to the second adapter. The first outlet of the first adapter is inclined relative to the vertical direction, which allows the oil accumulated on the first adapter to flow back into the air outlet pipe and avoid leakage at the connection with the second adapter.

[0022] Preferably, the first outlet of the first adapter has an included angle α with the vertical direction, and satisfies 8°≤α≤20°.

[0023] Furthermore, to prevent oil from dripping at the connection between the second adapter and the exhaust pipe, the first adapter has a first inlet connected to the air outlet pipe and a first outlet connected to the second adapter, and the second adapter includes a second inlet connected to the first adapter and a second outlet connected to the exhaust pipe.

[0024] The second adapter also includes an oil guide groove located on the outer periphery of the second outlet. The oil guide groove is formed by the end of the second adapter away from the second inlet being recessed in the direction of the second inlet, and the oil guide groove is in communication with the interior of the second adapter.

[0025] Furthermore, to facilitate the connection between the first adapter and the second adapter, the first adapter and the second adapter are snapped together. The first adapter has a first slot at the connection point with the second adapter. The width of the first slot gradually decreases from the direction away from the second adapter toward the second adapter. The end of the second adapter opposite to the first adapter is inserted into the first slot.

[0026] To further improve the stability of the snap-fit, a groove is formed on the inner wall of the end of the second adapter, and a protrusion is formed on the inner wall of the first slot located on the second adapter, the protrusion being able to snap into the groove.

[0027] To reduce eddies within the second adapter, the airflow within the second adapter is rectified to ensure air volume and reduce noise. A guide plate is provided within the second adapter. The guide plate has at least two and is arranged parallel to the long side of the rectangle of the second inlet. Each guide plate is rotatably connected to the second adapter, and the rotation axis of the guide plate is parallel to the long side of the rectangle of the second inlet.

[0028] The air outlet device also includes an oil fume concentration sensor for detecting the oil fume concentration at the second inlet and thus controlling the rotation of the guide vane.

[0029] To further improve versatility, the first adapter is a rigid, expandable pipe.

[0030] The adapter structure includes a first adapter, which is a curved rigid pipe. The first adapter is used to extend from below the ceiling to above the ceiling. The first adapter has a first inlet connected to the air outlet pipe and a first outlet connected to the smoke exhaust pipe. The cross-section of the first inlet is rectangular and the cross-section of the first outlet is circular.

[0031] To facilitate left and right replacement and improve ease of disassembly and assembly, while reducing the risk of oil leakage, the air outlet pipe and the air outlet cover are snapped together. The top of the air outlet cover has a second slot, and the bottom of the air outlet pipe is snapped into the second slot.

[0032] Compared with the prior art, the advantages of this utility model are as follows: By setting a flexible air outlet pipe and a rigid connecting structure, it is not only easy to install and connect with the range hood body, but the connecting structure is also easy to fix, and it can also reduce vibration at the bend, reduce noise, and solve the problem that the exhaust pipe cannot bend due to insufficient ceiling space; by setting a connecting structure, the air outlet device can be adapted to various installation directions, improving versatility; by making the inlet and outlet cross sections of the air outlet hood and the air outlet pipe rectangular, sufficient air outlet area can be ensured; by making the first connecting piece relatively inclined to the vertical direction, oil leakage of the first connecting piece is prevented; by setting a guide plate in the second connecting piece, the eddy current in the second connecting piece is reduced, ensuring air volume; by snapping the air outlet hood and the air outlet piece together, it is convenient to replace left and right and improve the convenience of disassembly and assembly, while reducing the risk of oil leakage. Attached Figure Description

[0033] Figure 1 This is an installation diagram of the range hood according to the first embodiment of this utility model;

[0034] Figure 2 This is a schematic diagram of a concealed decorative cover for a range hood according to an embodiment of the present utility model;

[0035] Figure 3 This is a schematic diagram of the air outlet device and exhaust pipe of the range hood according to the first embodiment of this utility model;

[0036] Figure 4 This is an exploded view of the air outlet device of the range hood according to the first embodiment of the present utility model;

[0037] Figure 5 This is a cross-sectional view of the air outlet device of the range hood according to the first embodiment of this utility model;

[0038] Figure 6 for Figure 5 A magnified schematic diagram of part I;

[0039] Figure 7 for Figure 5 A magnified schematic diagram of part II;

[0040] Figure 8 This is a three-dimensional structural diagram of the second adapter of the air outlet device of the range hood according to the first embodiment of the present utility model;

[0041] Figure 9 This is a three-dimensional structural diagram of the second adapter of the air outlet device of the range hood according to the first embodiment of this utility model (and...). Figure 8 (Different perspectives);

[0042] Figure 10 This is a bottom view of the second adapter of the air outlet device of the range hood according to the first embodiment of this utility model;

[0043] Figure 11 This is a schematic diagram of the first adapter of the air outlet device of the range hood according to the first embodiment of the present utility model;

[0044] Figure 12 This is a schematic diagram of the first and second adapter components of the air outlet device of the range hood according to the second embodiment of this utility model. Detailed Implementation

[0045] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0046] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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. Since the embodiments disclosed in this utility model can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0047] Example 1

[0048] See Figures 1 to 7 A range hood includes a range hood body 1, an air outlet device, and a decorative cover 3. The range hood body 1 is preferably ultra-thin, but can also be other existing forms. It is similar to existing technologies, such as those mentioned in the background section, including a housing and a fan system.

[0049] The air outlet device is located at the air outlet of the range hood body 1, part of which is located below the kitchen ceiling 100, and part of which is located above the ceiling 100. To prevent the air outlet device located below the ceiling 100 from being exposed, a decorative cover 3 is installed on its exterior.

[0050] Along the path of the oil fume flow, the air outlet device includes an air outlet hood 21, an air outlet duct 22, a first adapter 23, and a second adapter 24 arranged sequentially. The first adapter 23 and the second adapter 24 form a connecting structure to connect the air outlet duct 22 to the exhaust pipe 200. Since the air outlet of the fan system of the range hood body 1 is usually rectangular (determined by the air outlet of the volute), the air outlet hood 21 is a square-to-square component, meaning that its cross-section at the inlet of the range hood body 1 and the cross-section at the outlet connected to the air outlet duct 22 are both rectangular. This allows connection to the rectangular cross-section air outlet duct 22, which extends vertically, particularly vertically, and is located entirely below the ceiling 100. Thus, the air outlet hood 21 and air outlet duct 22, compared to a circular duct, can both meet the installation space requirements and increase the air outlet area. Furthermore, the air outlet duct 22 is a flexible aluminum foil hose, which can be extended to adapt to different ceiling 100 heights, facilitating transportation.

[0051] The first adapter 23 connects the exhaust duct 22 and the second adapter 24, extending from below the ceiling 100 to above it. The first adapter 23 is a curved rigid pipe, with an overall arc-shaped bend, thereby changing the direction of the oil fume flow from a vertical (bottom-up) to a horizontal (left-right) direction. Similarly, the cross-sections of the first inlet 231 connecting the first adapter 23 to the exhaust duct 22 and the first outlet 232 connecting the first adapter 23 to the second adapter 24 are both rectangular. The first inlet 231 of the first adapter 23 is preferably horizontal, while the first outlet 232 of the second adapter 23 has an angle α with the vertical direction, satisfying 8°≤α≤20°; in this embodiment, α is 15°. Therefore, oil accumulated at the first outlet 232 of the first adapter 23 can flow back into the exhaust duct 22 along the first adapter 23, preventing the risk of oil leakage due to accumulation.

[0052] The second adapter 24 is located above the ceiling 100 and is used to connect to the exhaust pipe 200. The second adapter 24 is similar to a prior art exhaust hood and is a rigid structure. The second adapter 24 is placed horizontally, and its angle with the horizontal direction (the angle between the axis of the second outlet 242 described below and the horizontal direction) depends on the angle between the first outlet 232 of the first adapter 23 and the vertical direction. See also... Figures 5 to 11The second adapter 24 includes a rectangular cross-section second inlet 241 connected to the first adapter 23 and a circular cross-section second outlet 242 connected to the exhaust pipe 200. Since the first adapter 23 and the second adapter 24 are placed at an angle, they are prone to oil leakage. Therefore, the second adapter 24 also includes an oil guide groove 243 located on the outer periphery of the second outlet 242. The oil guide groove 243 is formed by a recess in the end of the second adapter 24 away from the second inlet 241 towards the second inlet 241. The oil guide groove 243 communicates with the interior of the second adapter 24, and the oil in the oil guide groove 243 can flow back to the exhaust pipe 22 through the second adapter 24 and the first adapter 23, thereby preventing oil dripping.

[0053] Regarding the connection method of the above structure, the air outlet duct 22 and the first adapter 23 can be connected by screws and then glued together to form a single unit. The first adapter 23 and the second adapter 24 are snap-fitted together. The first adapter 23 has a first groove 233 at the connection point with the second adapter 24. The width of the first groove 233 gradually decreases from the direction away from the second adapter 24 towards the second adapter 24. The end of the second adapter 24 opposite to the first adapter 23 is inserted into the first groove 233. To improve connection stability, a groove 244 is formed on the inner wall of the end of the second adapter 24, and a protrusion 234 is formed on the inner wall of the second adapter 24 where the first groove 233 is formed. The protrusion 234 can be snapped into the groove 244, thereby improving connection stability and also serving as a reminder that the connection is in place.

[0054] To facilitate left-right reversal and easy disassembly and assembly, the connection between the air outlet duct 22 and the air outlet cover 21 is designed as a snap-fit. A second slot 211 is formed on the top of the air outlet cover 21, and the bottom of the air outlet duct 22 is snapped into the second slot 211 to prevent oil leakage. The top of the air outlet cover 21 has a first peripheral wall 212 and a second peripheral wall 213, with the second peripheral wall 213 spaced apart from the outer periphery of the first peripheral wall 212. The second slot 211 is formed between the first peripheral wall 212 and the second peripheral wall 213, thus the bottom of the air outlet duct 22 is snapped into the second slot 211, forming an installation structure on the lower cover, which can further prevent oil leakage.

[0055] Due to space constraints caused by its ultra-thin design, the second adapter 24 is designed with an offset structure. That is, when the second adapter 24 is placed vertically (with the second inlet 241 on a horizontal plane), the center O1 of the cross-section of the second inlet 241 and the center O2 of the cross-section of the second outlet 242 do not overlap in the horizontal projection. This offset structure causes the fumes to form a vortex within the second adapter 24 during operation, resulting in a reduction in the flow rate at the second outlet 242. To address this, at least two guide plates 25 are provided within the second adapter 24, arranged parallel to the long side of the rectangle of the second inlet 241, forming a segmented design. Each guide plate 25 is rotatably connected to the second adapter 24 via a pivot 251, with the axis of rotation parallel to the long side of the rectangle of the second inlet 241. When the second adapter 24 is placed vertically, its projection in the horizontal plane passes through the center of the rectangle of the second inlet 241. The rotating shaft 251 is positioned near the second inlet 241, and each guide vane 25 can rotate independently (the mechanism driving the guide vane 25 is not shown). Furthermore, the air outlet device includes an oil fume concentration sensor 26, which detects the oil fume concentration at the second inlet 241 and controls the rotation angle of each guide vane 25 based on the detected value. Of course, even if the second adapter 24 is not biased, the guide vanes 25 can still be installed to mitigate eddies caused by other factors.

[0056] Due to the offset structure design and horizontal placement of the second adapter 24, eddies and uneven oil fume flow are prone to occur. The oil fume concentration sensor 26 detects the oil fume concentration. When the range hood is working, if the oil fume concentration at a certain position is too high, the guide plate 25 at that position will start to work and adjust its angle to achieve the guiding effect, thereby solving the problem of eddies. The segmented guide plate 25 avoids energy waste.

[0057] With the above-mentioned air outlet device, the turning direction is not restricted (the air outlet pipe 22 is a flexible hose), there is no risk of oil leakage, the first adapter 23 is a rigid pipe, and the range hood will not produce noise when it is working.

[0058] Example 2

[0059] In this embodiment, the difference from the first embodiment described above is that the first adapter 23 is a rigid, expandable pipe.

[0060] Example 3

[0061] See Figure 12 In this embodiment, the difference from the first embodiment is that the first outlet 232 of the first adapter 23 is circular, and the second adapter 24 is no longer provided.

Claims

1. A range hood, comprising a range hood body (1), an air outlet device, and a smoke exhaust pipe (200), characterized in that: The air outlet device includes: An exhaust hood (21) is connected to the exhaust port of the range hood body (1); The air outlet duct (22) is a flexible hose extending vertically and connected to the air outlet hood (21); and The transition structure is a rigid, curved structure located partly below and partly above the ceiling (100) of the kitchen, thereby connecting the air outlet duct (22) and the smoke exhaust duct (200).

2. The range hood according to claim 1, characterized in that: The inlet and outlet cross sections of the air hood (21) and air duct (22) are both rectangular.

3. The range hood according to claim 1, characterized in that: The adapter structure includes a first adapter (23) and a second adapter (24). The first adapter (23) is connected between the air outlet duct (22) and the second adapter (24). The first adapter (23) is used to extend from below the suspended ceiling (100) to above the suspended ceiling (100), and the second adapter (24) is used to be installed above the suspended ceiling (100).

4. The range hood according to claim 3, characterized in that: The inlet and outlet cross sections of the air outlet hood (21) and the air outlet pipe (22) are both rectangular; The first adapter (23) has a first inlet (231) connected to the air outlet pipe (22) and a first outlet (232) connected to the second adapter (24), and the cross-sections of the first inlet (231) and the first outlet (232) are both rectangular; The second adapter (24) includes a second inlet (241) connected to the first adapter (23) and a second outlet (242) connected to the exhaust pipe (200). The cross-section of the second inlet (241) is rectangular, and the cross-section of the second outlet (242) is circular.

5. The range hood according to claim 3, characterized in that: The first adapter (23) has a first inlet (231) connected to the air outlet pipe (22) and a first outlet (232) connected to the second adapter (24), and the first outlet (232) of the first adapter (23) is inclined relative to the vertical direction.

6. The range hood according to claim 5, characterized in that: The first outlet (232) of the first adapter (23) has an included angle α with the vertical direction, and satisfies 8°≤α≤20°.

7. The range hood according to claim 3, characterized in that: The first adapter (23) has a first inlet (231) connected to the air outlet pipe (22) and a first outlet (232) connected to the second adapter (24), and the second adapter (24) includes a second inlet (241) connected to the first adapter (23) and a second outlet (242) connected to the smoke exhaust pipe (200); The second adapter (24) also includes an oil guide groove (243) located on the outer periphery of the second outlet (242). The oil guide groove (243) is formed by the end of the second adapter (24) away from the second inlet (241) being recessed in the direction of the second inlet (241). The oil guide groove (243) is in communication with the interior of the second adapter (24).

8. The range hood according to claim 3, characterized in that: The first adapter (23) and the second adapter (24) are snapped together. The first adapter (23) has a first slot (233) at the connection with the second adapter (24). The width of the first slot (233) gradually decreases from the direction away from the second adapter (24) toward the second adapter (24). The end of the second adapter (24) opposite to the first adapter (23) is inserted into the first slot (233).

9. The range hood according to claim 8, characterized in that: A groove (244) is formed on the inner wall surface of the end of the second adapter (24), and a protrusion (234) is formed on the inner wall surface of the first slot (233) located on the second adapter (24), and the protrusion (234) can be inserted into the groove (244).

10. The range hood according to claim 4, characterized in that: The second adapter (24) is provided with a guide plate (25). There are at least two guide plates (25) arranged in a direction parallel to the long side of the rectangle of the second inlet (241). Each guide plate (25) is rotatably connected to the second adapter (24), and the rotation axis of the guide plate (25) is parallel to the long side of the rectangle of the second inlet (241). The air outlet device also includes an oil fume concentration sensor (26) for detecting the oil fume concentration at the second inlet (241) and thus controlling the rotation of the guide plate (25).

11. The range hood according to claim 3, characterized in that: The first adapter (23) is a rigid, expandable pipe.

12. The range hood according to claim 1, characterized in that: The adapter structure includes a first adapter (23), which is a curved rigid pipe. The first adapter (23) is used to extend from below the ceiling (100) to above the ceiling (100). The first adapter (23) has a first inlet (231) connected to the air outlet pipe (22) and a first outlet (232) connected to the smoke exhaust pipe (200). The cross-section of the first inlet (231) is rectangular, and the cross-section of the first outlet (232) is circular.

13. The range hood according to claim 1, characterized in that: The air outlet pipe (22) and the air outlet cover (21) are connected by a snap-fit. The top of the air outlet cover (21) has a second slot (211), and the bottom of the air outlet pipe (22) is snapped into the second slot (211).

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