Air duct structure and electrical equipment

Abstract

The utility model relates to an air duct structure and electrical equipment. The air duct structure comprises an air duct shell; the air sweeping blades are rotatably mounted on the air duct shell in the first direction; the driving unit is installed on the air duct shell and is in transmission connection with the air sweeping blades, and the driving unit is used for driving the air sweeping blades to rotate in the first direction so as to be switched between the first state and the second state; when the air sweeping blades are in the first state, the air sweeping blades rotate in the first direction and are fixed relative to the air duct shell in the first direction. And when the air sweeping blades are in the second state, the air sweeping blades can move relative to the air duct shell in the first direction to be separated from the air duct shell. The air sweeping blades of the air duct structure can be easily disassembled and assembled without tools or deformation of the air sweeping blades, so that the air duct shell and the air sweeping blades can be conveniently cleaned, the production efficiency of the air duct structure is improved, meanwhile, the cleaning convenience of the air duct structure is improved, and dirt is effectively prevented from being left at cleaning dead corners.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a duct structure and electrical equipment. Background Technology

[0002] With social progress and improved living standards, more and more household appliances are entering people's lives. Range hoods are an indispensable household appliance in the kitchen. Range hoods can remove the fumes produced during cooking, which not only purifies the kitchen environment but also benefits human health.

[0003] As cooking progresses, the temperature in the kitchen often rises, affecting the comfort of the kitchen environment. To improve user comfort during cooking, a range hood with a built-in fan has emerged. These range hoods typically have an air duct structure to change the airflow pattern and angle, thereby achieving better cooling effects.

[0004] However, since the range hood is located in the kitchen, it is easy for grease to accumulate on it, making it necessary to clean the duct structure. However, due to structural defects, the existing duct structure is cumbersome to disassemble or even impossible to disassemble, which increases the difficulty of cleaning the duct structure. Utility Model Content

[0005] Therefore, it is necessary to provide a duct structure and electrical equipment to address the problem of the difficulty in cleaning the duct structure.

[0006] A duct structure, comprising:

[0007] Duct casing;

[0008] Sweeping blades are rotatably mounted on the duct housing about a first direction; and

[0009] A drive unit is installed in the air duct housing and is connected to the sweeping blades. The drive unit is used to drive the sweeping blades to rotate around the first direction to switch between the first state and the second state.

[0010] When the sweeping blade is in the first state, the sweeping blade is fixed relative to the duct housing in the first direction; when the sweeping blade is in the second state, the sweeping blade can move relative to the duct housing to detach from the duct housing.

[0011] The sweeping blades of the aforementioned air duct structure can be easily disassembled and assembled without the need for tools or deformation, thus facilitating the cleaning of the air duct casing and sweeping blades. This improves the production efficiency of the air duct structure while enhancing its cleaning convenience, effectively preventing the accumulation of dirt in cleaning dead corners.

[0012] In one embodiment, the sweeping blades are provided with a first rotating shaft and a second rotating shaft at their two ends in the first direction, and the first rotating shaft and the second rotating shaft are respectively confined within the air duct housing; the drive unit has a limiting hole and a limiting surface surrounding one end of the limiting hole in the circumferential direction;

[0013] When the sweeping blade is in the first state, the first rotating shaft abuts against the limiting surface in the first direction;

[0014] When the sweeping blade is in the second state, the first rotating shaft extends into the limiting hole so that the second rotating shaft is disengaged from the air duct housing.

[0015] Thus, by setting the limiting hole and limiting surface, the connection state between the first rotating shaft and the air duct housing can be changed by controlling the rotation of the sweeping blade, thereby realizing the fixing and disassembly of the sweeping blade.

[0016] In one embodiment, the limiting surface has a disassembly notch that connects to the limiting hole, and the outer circular surface of the first rotating shaft has a limiting pin protruding therefrom;

[0017] When the sweeping blade is in the first state, the limiting pin is misaligned with the disassembly notch, and the limiting pin abuts against the limiting surface in the first direction;

[0018] When the sweeping blade is in the second state, the limiting pin is aligned with the disassembly notch and can extend into the disassembly notch.

[0019] Thus, by changing the positional relationship between the limiting pin and the disassembly notch, the sweeping blades can be fixed and disassembled.

[0020] In one embodiment, the driving unit includes a limiting post, the limiting hole is formed in the limiting post, and one end face of the limiting post forms the limiting surface.

[0021] Thus, the limiting hole and the limiting surface are formed by the limiting post.

[0022] In one embodiment, the drive unit includes a drive member and a driven gear shaft. The drive member is mounted on the air duct housing, and the driven gear shaft is drivenly connected to the drive member. The driven gear shaft passes through the limiting post and is connected to the first rotating shaft. Under the drive of the drive member, the driven gear shaft drives the first rotating shaft to rotate around the first direction.

[0023] In this way, the drive component can drive the sweeping blades to rotate through the driven gear shaft, thereby realizing the change of sweeping angle and sweeping mode.

[0024] In one embodiment, a limiting notch is provided on the outer circular surface of the driven gear shaft, and the limiting pin protrudes from the outer circular surface of the driven gear shaft through the limiting notch.

[0025] In this way, the driven gear shaft avoids the limiting pin of the first rotating shaft through the limiting notch, thus realizing the connection between the driven gear shaft and the sweeping blade.

[0026] In one embodiment, the duct housing is provided with limiting ribs located on the rotation path of the driven gear shaft to limit the rotation angle of the driven gear shaft.

[0027] In this way, the rotation angle of the driven gear shaft is precisely limited through mechanical means, which has high reliability and low cost.

[0028] In one embodiment, the driven gear shaft includes a main shaft and a meshing portion protruding from the main shaft. The meshing portion is connected to the driving member in a transmission manner, and the limiting rib is located on the rotation path of the meshing portion.

[0029] In this way, the rotation angle of the driven gear shaft is precisely limited through mechanical means, which has high reliability and low cost.

[0030] An electrical device comprising the aforementioned air duct structure.

[0031] The air duct structure of the aforementioned electrical equipment has air sweeping blades that can be easily disassembled and assembled without the need for tools or deformation. This makes it convenient to clean the air duct casing and air sweeping blades, improving the production efficiency of the electrical equipment while enhancing its cleaning convenience and effectively preventing the accumulation of dirt in cleaning dead corners.

[0032] In one embodiment, the electrical device is a range hood. Attached Figure Description

[0033] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of an air duct structure according to an embodiment of this application.

[0036] Figure 2 for Figure 1 The diagram shows an exploded view of the air duct structure.

[0037] Figure 3 for Figure 1 The diagram shows the internal structure of the air duct.

[0038] Figure 4 for Figure 1 The diagram shows the assembly of the sweeping blades and drive unit of the air duct structure.

[0039] Figure 5 This is a schematic diagram of the driven gear shaft of an air duct structure according to an embodiment of this application.

[0040] Figure 6 This is a cross-sectional view of a duct structure according to an embodiment of this application.

[0041] Figure 7 for Figure 6 A magnified view of part A of the air duct structure shown.

[0042] Figure 8 This is a schematic diagram of the first rotation axis of the sweeping blades in an embodiment of the air duct structure of this application.

[0043] Figure 9 This is a schematic diagram of the box and limiting post of an embodiment of the air duct structure of this application.

[0044] Figure 10 This is a schematic diagram of the drive unit of a duct structure according to an embodiment of this application.

[0045] Figure 11 This is a schematic diagram showing the position of the limiting pin when the sweeping blade of the air duct structure of an embodiment of this application is at 0°.

[0046] Figure 12 for Figure 11 A schematic diagram of the position of the limiting pin when the sweeping blades of the air duct structure shown are at 0°, from another angle.

[0047] Figure 13 This is a schematic diagram showing the position of the limiting pin when the sweeping blade of the air duct structure of an embodiment of this application is at 90°.

[0048] Figure 14 for Figure 13 A schematic diagram of the position of the limiting pin when the sweeping blades of the air duct structure shown are at 90°, from another angle.

[0049] Figure 15 This is a schematic diagram showing the position of the limiting pin when the sweeping blade of the air duct structure of an embodiment of this application is at 110°.

[0050] Figure 16 for Figure 15 A schematic diagram of the position of the limiting pin when the sweeping blades of the air duct structure shown are at 110°.

[0051] Explanation of reference numerals in the attached figures:

[0052] 100. Duct structure; 20. Duct housing; 21. First mounting part; 23. Second mounting part; 232. Bushing; 20a. Accommodation space; 40. Sweeping blade; 41. First rotating shaft; 412. Limiting pin; 43. Second rotating shaft; 60. Drive unit; 61. Gearbox; 612. Box body; 6121. Limiting rib; 614. Box cover; 63. Drive component; 65. Drive gear; 67. Driven gear shaft; 672. Main shaft; 672a. Limiting notch; 674. Meshing part; 69. Limiting post; 69a. Limiting hole; 69b. Limiting surface; 69c. Disassembly notch. Detailed Implementation

[0053] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0054] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this application.

[0055] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0057] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0059] See Figure 1 An embodiment of this application provides an electrical device (not shown) including a duct structure 100 for conveying airflow.

[0060] The structure of the duct structure 100 in this application will be described below using a range hood as an example. This embodiment is only used as an example and does not limit the technical scope of this application. It is understood that in other embodiments, the electrical device may also be other devices with the duct structure 100 installed, which is not limited here.

[0061] Please see Figures 1 to 3The air duct structure 100 includes an air duct housing 20, a sweeping blade 40, and a drive unit 60. The air duct structure 100 is an elongated strip extending along a first direction. The sweeping blade 40 is rotatably mounted on the air duct housing 20 around the first direction. The drive unit 60 is mounted on the air duct housing 20 and is drively connected to the sweeping blade 40. The drive unit 60 drives the sweeping blade 40 to rotate around the first direction to switch between a first state and a second state.

[0062] When the sweeping blade 40 is in the first state, it is fixed relative to the duct housing 20 in the first direction. At this time, the sweeping blade 40 performs normal sweeping operation and can rotate around the first direction to change the air outlet angle and pattern. Because the sweeping blade 40 is fixed relative to the duct housing 20 in the first direction, it is locked and cannot move. When the sweeping blade 40 is in the second state, it can move relative to the duct housing 20 to detach from it, allowing for easy removal for cleaning.

[0063] Thus, the sweeping blades 40 of the aforementioned air duct structure 100 can be easily disassembled and assembled without the need for tools or deformation, making it convenient to clean the air duct housing 20 and the sweeping blades 40. This improves the production efficiency of the air duct structure 100 while enhancing its cleaning convenience and effectively preventing the accumulation of dirt in cleaning dead corners.

[0064] like Figure 1 As shown, the duct housing 20 has a long, hollow shell structure, and its length extends along a first direction. Specifically, in one embodiment, the duct housing 20 includes a first mounting portion 21 and two second mounting portions 23. The two second mounting portions 23 are respectively spaced apart on opposite sides of the first mounting portion 21 in the first direction, and are symmetrically arranged with the first mounting portion 21 as the center of symmetry. The first mounting portion 21 and the two second mounting portions 23 define two accommodating spaces 20a for accommodating the sweeping blade 40, each accommodating space 20a accommodating one sweeping blade 40. It can be understood that in other embodiments, the duct structure 100 may also include only one sweeping blade 40, and the duct housing 20 may form only one accommodating space 20a to accommodate the sweeping blade 40.

[0065] like Figure 2As shown, the air duct structure 100 includes two sweeping blades 40, which are respectively housed in an accommodating space 20a. Each sweeping blade 40 has a long strip structure. Each sweeping blade 40 has a first rotating shaft 41 and a second rotating shaft 43 at its two ends in the first direction. The first rotating shaft 41 is inserted into the first mounting part 21 along the first direction, and the second rotating shaft 43 is inserted into the second mounting part 23 along the first direction, so that the sweeping blade 40 is rotatably mounted on the air duct housing around the first direction.

[0066] When the sweeping blade 40 is in the first state, the first rotating shaft 41 is located at the upper limit of the first mounting portion 21 in the first direction, and the second rotating shaft 43 is located at the upper limit of the second mounting portion 23 in the second direction. Therefore, the sweeping blade 40 can only rotate around the first direction and will not move in the first direction. When the sweeping blade 40 is in the second state, the sweeping blade 40 can move along the first direction away from the second mounting portion 23, so that the second rotating shaft 43 is disengaged from the second mounting portion 23, thereby allowing the sweeping blade 40 to be removed from the air duct housing 20.

[0067] Please see Figures 2 to 4 The drive unit 60 is housed in the first mounting part 21 and includes a gear box 61, a drive member 63, a drive gear 65, and a driven gear shaft 67.

[0068] The gearbox 61 includes a housing 612 and a cover 614. The housing 612 and the cover 614 are mated together along a first direction to form a receiving cavity for accommodating the driving gear 65 and the driven gear shaft 67. The driving component 63 is a motor, which is mounted on the side of the housing 612 facing away from the cover 614 by screws or other fasteners. The output shaft of the driving component 63 extends into the receiving cavity through the housing 612 along the first direction. The driving gear 65 is accommodated in the receiving cavity and sleeved on the output shaft of the driving component 63. The driving gear 65 can rotate around the first direction under the drive of the driving component 63.

[0069] Please combine Figures 2 to 5 As shown, the driven gear shaft 67 includes a main shaft 672 and a meshing portion 674. The main shaft 672 passes through the gear box 61 along a first direction, with its opposite ends extending out of opposite sides of the gear box 61. The meshing portion 674 protrudes from the outer surface of the main shaft 672. The projection of the meshing portion 674 onto a plane perpendicular to the first direction is approximately fan-shaped. The outer periphery of the meshing portion 674 is provided with transmission teeth to mesh with the driving gear 65. Therefore, the driven gear shaft 67 is connected to the driving member 63 via the driving gear 65, and the driven gear shaft 67 can rotate under the drive of the driving member 63.

[0070] Furthermore, such as Figure 4 , Figure 6 and Figure 7As shown, the drive unit 60 also includes two limiting posts 69. One limiting post 69 protrudes from the side of the cover 614 facing away from the box body 612, and the other limiting post 69 protrudes from the side of the box body 612 facing away from the cover 614. Each limiting post 69 is a hollow columnar structure with its central axis extending along a first direction. Each limiting post 69 has a limiting hole 69a extending through it along the first direction. The end face of each limiting post 69 facing the second mounting part 23 forms a limiting surface 69b that surrounds the limiting hole 69a circumferentially. The main shaft 672 of the driven gear shaft 67 can pass through the limiting holes 69a of the two limiting posts 69 along the first direction. The two axial ends of the main shaft 672 extend out of the limiting holes 69a, and one axial end of the main shaft 672 protrudes from the limiting surface 69b and is sleeved on the first rotating shaft 41 of the sweeping blade 40 to connect with the first rotating shaft 41.

[0071] Furthermore, combining Figure 7 , Figure 8 as well as Figure 9 As shown, each limiting post 69 has a limiting surface 69b with a disassembly notch 69c that connects to the limiting hole 69a. The outer circular surface of the main shaft 672 of the driven gear shaft 67 has a limiting notch 672a. The first rotating shaft 41 of the sweeping blade 40 is inserted into the driven gear shaft 67 along the first direction, and the outer circular surface of the first rotating shaft 41 is provided with a limiting pin 412. The limiting pin 412 can extend from the limiting notch 672a along the radial direction of the driven gear shaft 67.

[0072] When the sweeping blade 40 is in the first state, the limiting pin 412 of the first rotating shaft 41 is misaligned with the disassembly notch 69c of the limiting post 69. Therefore, the limiting pin 412 abuts against the limiting surface 69b of the limiting post 69 in the first direction, thus preventing the sweeping blade 40 from moving in the first direction. When the sweeping blade 40 is in the second state, the limiting pin 412 is aligned with the disassembly notch 69c and can extend into the disassembly notch 69c. Therefore, the first rotating shaft 41 can further extend into the driven gear shaft 67, so that the sweeping blade 40 can move away from the second mounting part 23 until the second rotating shaft 43 disengages from the second mounting part 23.

[0073] It is understood that in some other embodiments, the limiting post 69 may not be provided, and the limiting hole 69a, the limiting surface 69b, and the disassembly notch 69c may be formed in other locations.

[0074] In some embodiments, the second mounting portion 23 is provided with a bushing 232, and the second rotating shaft 43 of the sweeping blade 40 can be inserted into the bushing 232 along the first direction, thereby being rotatably mounted on the second mounting portion 23.

[0075] like Figure 10As shown, in some embodiments, the drive unit 60 further includes a limiting rib 6121, which protrudes from the side of the gear box 61 body 612 facing the box cover 614. The limiting rib 6121 is located on the rotation path of the driven gear shaft 67, thereby limiting the rotation angle of the driven gear shaft 67.

[0076] In one specific embodiment, the gear box 61 is provided with two spaced-apart limiting ribs 6121. Both limiting ribs 6121 are located on the rotation path of the meshing part 674. When the meshing part 674 rotates clockwise or counterclockwise to a preset position, the limiting ribs 6121 can block the meshing part 674 so that the meshing part 674 cannot continue to rotate, thereby ensuring the accuracy of the rotation angle of the driven gear shaft 67.

[0077] Compared to controlling the output angle of the drive component 63 using a program, the mechanical control method using the limiting rib 6121 is more accurate and less costly. In other embodiments, the meshing portion 674 of the driven gear shaft 67 can also be a complete circular gear, and the rotation angle can also be limited by setting other limiting components on the driven gear shaft 67.

[0078] In some embodiments, the duct structure 100 has a sweeping mode and a cleaning mode. When the duct structure 100 is in the sweeping mode, the sweeping blades 40 are in a first state, and the sweeping blades 40 rotate around a first direction to change the air outlet angle of the duct structure 100. When the duct structure 100 is in the cleaning mode, the sweeping blades 40 are in a second state, and the sweeping blades 40 can be detached from the duct housing 20 to facilitate cleaning of the sweeping blades 40 and the duct housing 20.

[0079] Specifically, when the air duct structure 100 is in the sweeping mode, the drive component 63 can controllably control the rotation angle of the driven gear shaft 67, causing the sweeping blades 40 to switch between 0° and 90°. For example... Figure 11 , Figure 12 As shown, when the sweeping blade 40 is at 0°, the sweeping blade 40 is in the closed state, as... Figure 13 , Figure 14 As shown, when the sweeping blade 40 is at 90°, it is at its maximum opening angle. At this time, the limiting pin 412 of the first rotation shaft 41 of the sweeping blade 40 is misaligned with the disassembly notch 69c of the limiting post 69. Therefore, the limiting pin 412 abuts against the limiting post 69, preventing the sweeping blade 40 from moving along the first direction while rotating, thus ensuring that the sweeping blade 40 will not fall off naturally during normal operation.

[0080] When the air duct structure 100 is in cleaning mode, such as Figure 15 , Figure 16As shown, the drive unit 63 controls the sweeping blade 40 to rotate to 110°. At this time, the limiting pin 412 of the first rotation shaft 41 of the sweeping blade 40 is aligned with the disassembly notch 69c of the limiting post 69, so the sweeping blade 40 can be disassembled from the air duct housing 20.

[0081] The installation process of the swept blades 40 of the above-mentioned air duct structure 100 is as follows:

[0082] First, the air duct structure 100 is placed in cleaning mode. The first rotating shaft 41 of the sweeping blade 40 is inserted into one end of the driven gear shaft 67. The limiting pin 412 of the first rotating shaft 41 is inserted into the limiting notch 672a of the driven gear shaft 67. At this time, the limiting pin 412 is aligned with the disassembly notch 69c of the limiting post 69 in the first direction, so the limiting pin 412 can be further inserted into the disassembly notch 69c. Then, the second rotating shaft 43 of the sweeping blade 40 is inserted into the bushing 232, thereby completing the installation of the sweeping blade 40.

[0083] When the second rotating shaft 43 is inserted into the bushing 232, the limiting pin 412 of the first rotating shaft 41 disengages from the disassembly notch 69c of the limiting post 69. When the driving member 63 drives the sweeping blade 40 to rotate within a certain angle range through the driving wheel and the driven gear shaft 67 and is in the first state, the limiting pin 412 is misaligned with the disassembly notch 69c and abuts against the limiting surface 69b of the limiting post 69 in the first direction. Therefore, the limiting post 69 limits the sweeping blade 40 in the first direction to prevent the sweeping blade 40 from moving in the first direction. Thus, by controlling the rotation angle of the sweeping blade 40, the sweeping blade 40 can be prevented from falling off naturally during normal operation.

[0084] The disassembly process of the swept blades 40 of the aforementioned air duct structure 100 is as follows:

[0085] When it is necessary to disassemble the sweeping blade 40, the control air duct structure 100 is in the cleaning mode. The drive unit 63 drives the sweeping blade 40 to rotate to a certain angle through the drive wheel and the driven gear shaft 67 and is in the second state. At this time, the limiting pin 412 of the first rotating shaft 41 of the sweeping blade 40 is aligned with the disassembly notch 69c of the limiting post 69. Therefore, the sweeping blade 40 can be pulled to insert the limiting pin 412 into the disassembly notch 69c, thereby causing the second rotating shaft 43 of the sweeping blade 40 to disengage from the bushing 232. Finally, the first rotating shaft 41 disengages from the limiting post 69 and the driven gear shaft 67, thereby completing the disassembly of the sweeping blade 40.

[0086] The aforementioned duct structure 100 and its associated electrical equipment allow for convenient and quick assembly and disassembly of the sweeping blades 40 by controlling their angle. This ensures that the sweeping blades 40 will not detach during normal operation and guarantees stability during transportation. This improves both the production efficiency and cleaning convenience of the duct structure 100. Furthermore, since the sweeping blades 40 do not require deformation for installation, the structural strength of the sweeping blades 40 is effectively increased, while reducing the requirements for material selection and further lowering production costs.

[0087] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A duct structure, characterized in that, include: Duct casing (20); The air sweeping blade (40) is rotatably mounted on the air duct housing (20) about a first direction; as well as A drive unit (60) is installed on the air duct housing (20) and connected to the sweeping blade (40). The drive unit (60) is used to drive the sweeping blade (40) to rotate around the first direction to switch between the first state and the second state. When the sweeping blade (40) is in the first state, the sweeping blade (40) is fixed relative to the air duct housing (20) in the first direction; when the sweeping blade (40) is in the second state, the sweeping blade (40) can move relative to the air duct housing (20) to detach from the air duct housing (20).

2. The air duct structure according to claim 1, characterized in that, The sweeping blade (40) is provided with a first rotating shaft (41) and a second rotating shaft (43) at both ends in the first direction, and the first rotating shaft (41) and the second rotating shaft (43) are respectively limited to the air duct shell (20); the drive unit (60) has a limiting hole (69a) and a limiting surface (69b) surrounding one end of the limiting hole (69a) in the circumferential direction. When the sweeping blade (40) is in the first state, the first rotating shaft (41) abuts against the limiting surface (69b) in the first direction. When the sweeping blade (40) is in the second state, the first rotating shaft (41) extends into the limiting hole (69a) so that the second rotating shaft (43) disengages from the air duct housing (20).

3. The air duct structure according to claim 2, characterized in that, The limiting surface is provided with a disassembly notch (69c) that connects to the limiting hole (69a), and the outer circular surface of the first rotating shaft (41) is provided with a limiting pin (412). When the sweeping blade (40) is in the first state, the limiting pin (412) is misaligned with the disassembly notch (69c), and the limiting pin (412) abuts against the limiting surface (69b) in the first direction. When the sweeping blade (40) is in the second state, the limiting pin (412) is aligned with the disassembly notch (69c) and can extend into the disassembly notch (69c).

4. The air duct structure according to claim 3, characterized in that, The driving unit (60) includes a limiting post (69), the limiting hole (69a) is opened on the limiting post (69), and one end face of the limiting post (69) forms the limiting surface (69b).

5. The air duct structure according to claim 4, characterized in that, The drive unit (60) includes a drive member (63) and a driven gear shaft (67). The drive member (63) is mounted on the air duct housing (20). The driven gear shaft (67) is connected to the drive member (63). The driven gear shaft (67) passes through the limiting post (69) and is connected to the first rotating shaft (41). Under the drive of the drive member (63), the driven gear shaft (67) drives the first rotating shaft (41) to rotate around the first direction.

6. The air duct structure according to claim 5, characterized in that, The outer surface of the driven gear shaft (67) has a limiting notch (672a), and the limiting pin (412) protrudes from the outer surface of the driven gear shaft (67) through the limiting notch (672a).

7. The air duct structure according to claim 5, characterized in that, The air duct housing (20) is provided with a limiting rib (6121), which is located on the rotation path of the driven gear shaft (67) to limit the rotation angle of the driven gear shaft (67).

8. The air duct structure according to claim 7, characterized in that, The driven gear shaft (67) includes a main shaft (672) and a meshing part (674) protruding from the main shaft (672). The meshing part (674) is connected to the driving member (63) in a transmission manner. The limiting rib (6121) is located on the rotation path of the meshing part (674).

9. An electrical appliance, characterized in that, Includes the air duct structure as described in any one of claims 1 to 8.

10. The electrical equipment according to claim 9, characterized in that, The electrical appliance is a range hood.

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