Self-cleaning range hood

Abstract

The utility model relates to a kind of self-cleaning fan and range hood, it can eliminate impeller cleaning blind area simultaneously, realize the washing of volute tongue "ice" shape drip, solve the problem of abnormal sound caused by "ice" shape drip scraping impeller.This self-cleaning fan includes: fan main body, including the volute that is opened with let hole and the impeller being rotatably arranged in the volute;And cleaning device, including the fixed plate being fixed to the volute, the swing plate being rotatably arranged in the fixed plate, the rotary drive mechanism being installed in the swing plate, the cleaning medium supply piece being driven connection with the rotary drive mechanism to in and out the volute via the let hole and the swing drive mechanism being installed in the fixed plate and being driven connection with the swing plate;The swing axis of the swing plate is relatively parallel to the central axis of the impeller, and the rotation axis of the rotary drive mechanism is located in the plane that is perpendicular to the central axis of the impeller.

Description

Technical Field

[0001] This utility model relates to the field of kitchen equipment technology, and in particular to a self-cleaning fan and a range hood. Background Technology

[0002] With the continuous advancement of self-cleaning technology for range hoods, steam cleaning or water cleaning has been widely used in the field of range hood self-cleaning. The basic principle is that a steam generator produces steam or a water pump pumps water to deliver steam or water to the nozzle at the end of the spray pipe. The steam or water is then sprayed out quickly from the nozzle to clean the impeller.

[0003] Currently, in order to better extract cooking fumes, the impellers of existing range hoods are usually made of non-straight blades. However, existing cleaning technologies mainly clean the pressure surface of the impeller. During cleaning, the spray path of the nozzle is unique and usually moves along the axial direction of the impeller. In other words, even with the rotation of the impeller, the cleaning medium sprayed through the nozzle can only wash a part of the blades, resulting in blind spots in the cleaning of the blades.

[0004] Furthermore, after prolonged use, "icicle-like" drips will appear on the top of the volute (such as the volute tongue area) of the range hood, and these drips will grow longer over time, eventually causing noise due to friction with the impeller. However, the nozzles in existing cleaning technologies can usually only move along the axial direction of the impeller to clean different axial parts of the blades, but they cannot clean the top of the volute. Therefore, they cannot solve the problem of noise caused by "icicle-like" drips of grease in the volute tongue area, which can lead to the malfunction of the entire machine. Utility Model Content

[0005] To address the problems of existing range hoods, such as blind spots in impeller cleaning and the inability to flush away "ice crystal" drips of grease from the volute tongue area, this application provides a self-cleaning fan and range hood that can eliminate blind spots in impeller cleaning while flushing away "ice crystal" drips from the volute tongue, thus solving the noise problem caused by the "ice crystal" drips scraping against the impeller.

[0006] To achieve at least one of the above-mentioned advantages or other benefits and objectives of this utility model, this utility model provides a self-cleaning fan, comprising:

[0007] The fan body includes a volute with clearance holes and an impeller rotatably disposed within the volute; and

[0008] The cleaning device includes a fixed plate fixed to the volute, a swing plate rotatably disposed on the fixed plate, a rotary drive mechanism mounted on the swing plate, a cleaning medium supply component driven by the rotary drive mechanism to enter and exit the volute through the clearance hole, and a swing drive mechanism mounted on the fixed plate and driven by the swing plate; the swing axis of the swing plate is relatively parallel to the central axis of the impeller, and the rotation axis of the rotary drive mechanism is located in a plane relatively perpendicular to the central axis of the impeller.

[0009] In one embodiment of this application, the swing axis of the swing plate is arranged adjacent to the clearance hole arrangement of the volute.

[0010] In one embodiment of this application, the fixed plate has a clearance hole that matches the swing plate; when the included angle between the swing plate and the fixed plate is zero, the swing plate is located within the clearance hole of the fixed plate.

[0011] In one embodiment of this application, the swing drive mechanism includes a rotary motor fixed to the fixed plate, a cam fixedly connected to the output shaft of the rotary motor, and an elastic element disposed between the fixed plate and the swing plate; the portion of the swing plate that deviates from the swing axis abuts against the outer periphery of the cam under the elastic force of the elastic element.

[0012] In one embodiment of this application, the cam is an eccentric wheel; the elastic element is a tension spring, and the two ends of the tension spring are respectively limited and connected to the fixed plate and the swing plate.

[0013] In one embodiment of this application, the swing drive mechanism includes a rotary motor fixed to the fixed plate, a rotating arm fixedly connected to the output shaft of the rotary motor, and a connecting rod disposed between the rotating arm and the swing plate; one end of the connecting rod is rotatably connected to a portion of the rotating arm that is offset from the output shaft, and the other end of the connecting rod is rotatably connected to a portion of the swing plate that is offset from the swing axis.

[0014] In one embodiment of this application, the swing drive mechanism includes a rotary motor fixed to the fixed plate, a rotating arm fixedly connected to the output shaft of the rotary motor, and a limiting arm fixedly connected to the rotating arm; one end of the rotating arm is fixedly connected to the output shaft of the rotary motor, and the other end of the rotating arm is movably connected to a portion of the swing plate that is offset from the swing axis; the limiting arm can selectively abut against the fixed plate and the swing plate to limit the swing angle range of the swing plate.

[0015] In one embodiment of this application, the fixed plate includes a mounting plate body arranged parallel to the swing axis, a mounting frame body vertically fixed to the mounting plate body and mounting the rotary motor, and a limiting block protruding from the mounting frame body; the rotating arm and the limiting arm extend backward from the output shaft of the rotary motor; when the output shaft of the rotary motor rotates in the forward direction to drive the rotating arm to swing the swing plate downward to its limit position, the limiting arm abuts against the limiting block; the swing plate includes a swing plate body providing the swing axis and a hinged frame body protruding from the swing plate body and rotatably connected to the rotating arm; when the output shaft of the rotary motor rotates in the reverse direction to drive the rotating arm to swing the swing plate upward to its limit position, the limiting arm abuts against the swing plate body.

[0016] In one embodiment of this application, the volute includes an annular wall, a volute tongue protruding outward from the annular wall, and a pair of air inlet rings fixedly connected to both ends of the annular wall axially; the clearance hole is opened in the reflux area of ​​the annular wall; the cleaning medium supply component includes a moving part extending circumferentially along the rotation axis and a nozzle disposed at one end of the moving part; the rotary drive mechanism includes a rotary drive component fixedly mounted on the swing plate, a rotating shaft fixedly connected to the power output end of the rotary drive component and providing the rotation axis, and a connecting arm extending outward from the outer peripheral wall of the rotating shaft, the end of the connecting arm being fixedly connected to the moving part.

[0017] According to another aspect of this application, this application further provides a range hood, comprising:

[0018] shell; and

[0019] The self-cleaning fan described above is assembled into the housing.

[0020] In summary, the cleaning surface of the cleaning device of this application can move in the axial and radial directions of the impeller to form a three-dimensional cleaning space, thereby achieving all-round cleaning of the impeller and volute. This not only eliminates blind spots in impeller cleaning but also cleans the "ice crystal" drips on the volute, which helps to improve the overall cleaning effect and extend the service life of the range hood.

[0021] Furthermore, during the impeller cleaning process, the swing plate can drive the cleaning medium supply component to swing around the swing axis at a small angle under the drive of the swing drive mechanism, so that the cleaning medium sprayed by the cleaning medium supply component can directly rinse different radial parts on the impeller, thereby eliminating blind spots in impeller cleaning. Attached Figure Description

[0022] Figure 1 This is a first example of a self-cleaning fan according to an embodiment of the present invention;

[0023] Figure 2 An enlarged schematic diagram of the cleaning device in the self-cleaning fan according to the first example described above is shown;

[0024] Figure 3 A schematic diagram of the cleaning device according to the first example described above is shown from another perspective;

[0025] Figure 4 A schematic diagram of the state of the self-cleaning fan according to the first example described above during cleaning of the volute casing is shown;

[0026] Figure 5 A schematic diagram of the state of the self-cleaning fan according to the first example described above during impeller cleaning is shown;

[0027] Figure 6 A second example of a self-cleaning fan according to the above embodiments of the present invention is shown;

[0028] Figure 7 A schematic diagram of the state of the self-cleaning fan according to the above-described second example of the present invention during cleaning of the volute is shown;

[0029] Figure 8 A schematic diagram of the state of the self-cleaning fan according to the above-described second example of the present invention during impeller cleaning is shown;

[0030] Figure 9 A third example of a self-cleaning fan according to the above embodiments of the present invention is shown;

[0031] Figure 10 An exploded schematic diagram of the self-cleaning fan according to the third example described above is shown;

[0032] Figure 11 A schematic diagram showing the state of the swing plate of the cleaning device in the self-cleaning fan according to the above-described third example of the present invention at the lower limit swing angle is shown.

[0033] Figure 12 A schematic diagram showing the state of the swing plate of the cleaning device according to the third example above of the present invention at the upper limit swing angle is shown.

[0034] Explanation of main component symbols: 1. Self-cleaning fan; 10. Fan body; 11. Volute; 110. Clearance hole; 111. Annular wall; 112. Volute tongue; 113. Inlet ring; 12. Impeller; 120. Central axis; 20. Cleaning device; 21. Fixing plate; 210. Clearance hole; 211. Mounting plate; 212. Mounting frame; 213. Limiting block; 22. Swing plate; 220. Swing axis; 221. Swing plate; 222. Hinge frame; 2 220. Waist-shaped hole; 23. Rotary drive mechanism; 230. Rotation axis; 231. Rotary drive component; 232. Rotating shaft; 233. Connecting arm; 24. Cleaning medium supply component; 241. Moving part; 242. Nozzle; 25. Swing drive mechanism; 251. Rotary motor; 252. Cam; 253. Elastic component; 254. Rotating arm; 2540. Sliding shaft; 255. Connecting rod; 256. Limiting arm; 26. Protective cover; 30. Support frame.

[0035] The above description of the main component symbols, together with the accompanying drawings and specific embodiments, provides a further detailed explanation of this utility model. Detailed Implementation

[0036] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model 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 utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0037] 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", "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, and are not intended to 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 utility model.

[0038] Furthermore, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this utility model, unless otherwise explicitly 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 explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through 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. "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.

[0041] It should be noted that when 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. When 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. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0042] Considering that existing range hoods have a single cleaning path during cleaning, typically moving along the impeller axis, this not only creates blind spots in impeller cleaning but also fails to flush away the "ice crystal"-like drips of grease from the volute tongue area, easily causing abnormal noise and leading to overall machine malfunction. Therefore, this application provides a self-cleaning fan and range hood that can eliminate impeller cleaning blind spots while simultaneously flushing away the "ice crystal"-like drips from the volute tongue, solving the noise problem caused by the "ice crystal"-like drips scraping the impeller.

[0043] Specifically, according to another aspect of this application, such as Figures 1 to 12 As shown, one embodiment of this application provides a range hood, which may include a housing (not shown) and a self-cleaning fan 1 mounted on the housing for absorbing cooking fumes. It is understood that the range hood of this application may also include, but is not limited to, a water tank, a water collection box, and / or sensors to assist in completing the fume extraction function; these will not be elaborated upon here.

[0044] More specifically, such as Figures 1 to 12 As shown, the self-cleaning fan 1 of this application may include a fan body 10 and a cleaning device 20. The fan body 10 includes a volute 11 with a clearance hole 110 and an impeller 12 rotatably disposed within the volute 11. The cleaning device 20 includes a fixed plate 21 fixed to the volute 11, a swing plate 22 rotatably disposed on the fixed plate 21, a rotary drive mechanism 23 mounted on the swing plate 22, a cleaning medium supply member 24 drivenly connected to the rotary drive mechanism 23 to enter and exit the volute 11 via the clearance hole 110, and a swing drive mechanism 25 mounted on the fixed plate 21 and drivenly connected to the swing plate 22; the swing axis 220 of the swing plate 22 is relatively parallel to the central axis 120 of the impeller 12, and the rotation axis 230 of the rotary drive mechanism 23 is located in a plane relatively perpendicular to the central axis 120 of the impeller 12. It is understood that the relative parallelism or relative perpendicularity mentioned in this application refers to parallelism or perpendicularity within the range of installation error, and not absolute parallelism or absolute perpendicularity; for example, the included angle between 85° and 95° (i.e., 90°±5°) is defined as relatively perpendicular; the included angle between -5° and +5° (i.e., 0°±5°) is defined as relatively parallel.

[0045] It is worth noting that, on the one hand, since the swing axis 220 is parallel to the central axis 120, when the swing drive mechanism 25 drives the swing plate 22 to swing around the swing axis 220, the swing plate 22 will drive the cleaning medium supply member 24 to swing around the swing axis 220, thereby adjusting the nozzle orientation of the cleaning medium supply member 24 in the radial direction of the impeller 12, so that the cleaning medium sprayed by the cleaning medium supply member 24 can directly rinse the impeller 12 or the volute 11. On the other hand, since the rotation axis 230 is located in a plane perpendicular to the central axis 120 of the impeller 12, when the rotation drive mechanism 23 drives the cleaning medium supply member 24 to rotate around the rotation axis 230, the nozzle orientation of the cleaning medium supply member 24 will be adjusted in the axial direction of the impeller 12, so that the cleaning medium sprayed by the cleaning medium supply member 24 can directly rinse different axial positions on the impeller 12 or the volute 11, so as to achieve all-round cleaning of the impeller 12 or the volute 11. It is understandable that when the cleaning medium sprayed through the cleaning medium supply unit 24 directly washes the top of the volute 11, the "icicle"-shaped drips on the top of the volute 11 can be washed away by the cleaning medium, so as to solve the problem of abnormal noise caused by the "icicle"-shaped drips scraping the impeller.

[0046] In summary, the cleaning surface of the cleaning device 20 of this application can move in the axial and radial directions of the impeller 12 to form a three-dimensional cleaning space, thereby achieving all-round cleaning of the impeller 12 and the volute 11. This not only eliminates blind spots in impeller cleaning but also cleans the "ice crystal"-like drips on the volute, which helps to improve the overall cleaning effect and extend the service life of the range hood.

[0047] Furthermore, during the cleaning process of the impeller 12, the swing plate 22 can drive the cleaning medium supply member 24 to swing around the swing axis 220 at a small angle under the drive of the swing drive mechanism 25, so that the cleaning medium sprayed by the cleaning medium supply member 24 can directly rinse different radial parts on the impeller 12, so as to eliminate the impeller cleaning blind spot.

[0048] Exemplarily, in the first example of this application, such as Figure 1 , Figure 4 as well as Figure 5 As shown, the volute 11 may include an annular wall 111, a volute tongue 112 protruding outward from the annular wall 111, and a pair of air inlet rings 113 fixedly connected to the two ends of the annular wall 111 along its axial direction; the clearance hole 110 is opened in the recirculation area of ​​the annular wall 111 in order to reduce the impact on aerodynamic performance.

[0049] It is worth noting that the recirculation zone mentioned in this application generally refers to the arc-shaped area on the annular wall 111 with a central angle between 0° and 150°, where the central angle is centered on the axis of the impeller 12 and gradually increases along the rotation direction of the impeller 12; the 0° line refers to the straight line passing through the axis of the impeller 12 and tangent to the arc surface of the volute tongue 112. It can be understood that the space inside the volute 11 corresponding to the recirculation zone of the annular wall 111 is a significant vortex distribution area on the impeller 12. The presence of vortices indicates that the airflow between the blades is not easy to pass through and swirls between the blades, meaning that the airflow volume is small. Therefore, opening the clearance hole 110 in the recirculation zone of the annular wall 111 has a relatively small impact on aerodynamic performance.

[0050] Furthermore, since the return zone of the annular wall 111 is adjacent to the volute tongue 112, the nozzle orientation of the cleaning medium supply member 24 can be adjusted under the action of the swing drive mechanism 25, so that the cleaning medium sprayed through the cleaning medium supply member 24 can directly rinse the volute tongue 112, facilitating the cleaning of the "ice crystal" drips on the volute tongue. It is understood that in the application scenario of a range hood, the volute tongue 112 is usually located at the top of the volute shell 11, which is the part of the volute shell 11 most prone to "ice crystal" drips, thus effectively solving the problem of "ice crystal" drips.

[0051] Optionally, such as Figure 4 and Figure 5 As shown, the swing axis 220 of the swing plate 22 is arranged near the relief hole 110 of the volute 11 in order to reduce the opening of the volute and minimize the size of the relief hole 110, thereby further reducing the impact on aerodynamic performance.

[0052] It is worth noting that the swing plate 22 can be pivotally or rotatably hinged to the fixed plate 21. For example, the swing plate 22 can be connected to the fixed plate 21 by, but is not limited to, a hinge, and the hinge is located near the clearance hole 110, such that the swing axis 220 of the swing plate 22 is close to the clearance hole 110.

[0053] Optionally, such as Figure 2 and Figure 3 As shown, the fixed plate 21 has a clearance hole 210 that matches the swing plate 22, so that the swing plate 22 can swing up and down relative to the fixed plate 21 through the clearance hole 210, so as to better adjust the nozzle orientation of the cleaning medium supply component 24.

[0054] Optionally, such as Figure 2 and Figure 5As shown, when the included angle between the swing plate 22 and the fixed plate 21 is zero, the swing plate 22 is located within the clearance hole 210 of the fixed plate 21, so that the swing plate 22 is flush with the fixed plate 21, which helps to ensure that the nozzle of the cleaning medium supply member 24 is directed toward the impeller 12 for cleaning the impeller 12.

[0055] According to the above embodiments of this application, as Figure 2 and Figure 3 As shown, the cleaning medium supply member 24 may include a moving part 241 extending circumferentially along the rotation axis 230 and a nozzle 242 disposed at one end of the moving part 241; the rotary drive mechanism 23 includes a rotary drive member 231 fixed to the swing plate 22, a rotating shaft 232 fixedly connected to the power output end of the rotary drive member 231 and providing the rotation axis 230, and a connecting arm 233 extending outward from the outer peripheral wall of the rotating shaft 232, the end of the connecting arm 233 being fixedly connected to the moving part 241 of the cleaning medium supply member 24. In this way, the connecting arm 233 can support the moving part 241 and the nozzle 242 away from the rotation axis 230, so that the opening position of the relief hole 110 can be away from the rotation axis 230. This ensures that the nozzle 242 can enter the volute 11 through the relief hole 110, while also helping to ensure that the power output end of the rotary drive 231 is away from the relief hole 110, preventing the rotary drive 231 from being contaminated by oil leaking from the relief hole 110, and improving the service life of the rotary drive 231. It is understood that the rotary drive 231 mentioned in this application can be implemented as, but is not limited to, a drive such as a rotary motor or a servo motor, as long as it can drive the rotating shaft 232 to rotate. This application will not elaborate further on this.

[0056] Optionally, the moving part 241 has a hollow channel (not shown) communicating with the nozzle 242, so as to deliver cleaning medium to the nozzle 242 through the hollow channel for the nozzle 242 to spray the cleaning medium to clean the impeller 12 or the volute 11. It is understood that the other end of the moving part 241 may, but is not limited to, be connected to a water tank or steam generator via a hose, so that the cleaning medium (such as a liquid or gaseous medium) is supplied to the nozzle 242 through the hollow channel; this will not be elaborated further in this application. Furthermore, the moving part 241 of this application can be implemented as an arc-shaped rigid tube to stably support the nozzle 242 while minimizing the opening size of the clearance hole 110.

[0057] It is worth noting that the swing drive mechanism 25 of this application can drive the swing plate 22 to swing around the swing axis 220 by a linear drive or an eccentric rotation drive, so as to adjust the angle between the swing plate 22 and the fixed plate 21, so that the nozzle orientation of the cleaning medium supply member 24 can be adjusted in the radial direction of the impeller 12, ensuring that the cleaning medium sprayed by the cleaning medium supply member 24 can directly rinse the impeller 12 or the volute 11, so as to take into account the cleaning of both the impeller 12 and the volute 11.

[0058] For example, in the first example described above in this application, such as Figures 1 to 5 As shown, the swing drive mechanism 25 may include a rotary motor 251 fixed to the fixed plate 21, a cam 252 fixedly connected to the output shaft of the rotary motor 251, and an elastic member 253 disposed between the fixed plate 21 and the swing plate 22; the portion of the swing plate 22 that deviates from the swing axis 220 abuts against the outer periphery of the cam 252 under the elastic force of the elastic member 253. Thus, as... Figure 4 and Figure 5 As shown, when the rotary motor 251 drives the cam 252 to rotate, the outer periphery of the cam 252 rolls against the portion of the swing plate 22 that is offset from the swing axis 220. Under the elastic force of the elastic member 253, the swing plate 22 is driven away from or closer to the output shaft of the rotary motor 251, causing the swing plate 22 to swing up and down relative to the fixed plate 21 around the swing axis 220 to adjust the nozzle orientation of the cleaning medium supply member 24. At the same time, the swing drive mechanism 25 of this application, with the cooperation of the cam 252 and the elastic member 253, can control the swing angle of the swing plate 22 within a specified range, so as to meet the needs of cleaning surface adjustment while avoiding structural interference. It is understood that the rotary motor 251 mentioned in this application can be, but is not limited to, a rotary motor or a servo motor.

[0059] Optionally, such as Figure 4 and Figure 5 As shown, the outer periphery of the cam 252 rolls against the part of the swing plate 22 away from the swing axis 220, so as to increase the lever arm of the cam 252 applying the pressure to the swing plate 22, which helps to reduce the output power of the rotary motor 251.

[0060] Optionally, the cam 252 is implemented as an eccentric wheel to continuously adjust the nozzle orientation of the cleaning medium supply 24, so that the nozzle orientation of the cleaning medium supply 24 can be changed uninterruptedly in the radial direction of the impeller 12, which facilitates the elimination of impeller cleaning blind spots.

[0061] Optionally, the elastic element 253 is implemented as a tension spring, with its two ends respectively limited and connected to the fixed plate 21 and the swing plate 22 to apply a pulling force toward the cam 252 to the swing plate 22, so that the swing plate 22 always abuts against the outer periphery of the cam 252. It is understood that in other examples of this application, the elastic element 253 may also be implemented as a compression spring, or the elastic element 253 may be replaced by a magnetic element, as long as it can apply a force toward the cam 252 to the swing plate 22, so that the swing plate 22 always abuts against the outer periphery of the cam 252. This application will not elaborate further on this. Furthermore, the limiting connection mentioned in this application may be implemented as a hook or snap-fit ​​connection, but is not limited to that described above.

[0062] It is worth mentioning that, in the second example of this application, such as Figures 6 to 8 As shown, the swing drive mechanism 25 may include a rotary motor 251 fixed to the fixed plate 21, a rotating arm 254 fixedly connected to the output shaft of the rotary motor 251, and a connecting rod 255 disposed between the rotating arm 254 and the swing plate 22. One end of the connecting rod 255 is rotatably connected to a portion of the rotating arm 254 offset from the output shaft, and the other end of the connecting rod 255 is rotatably connected to a portion of the swing plate 22 offset from the swing axis 220. Thus, when the rotary motor 251 drives the rotating arm 254 to rotate, the rotating arm 254, through the connecting rod 255, drives the swing plate 22 away from or towards the output shaft of the rotary motor 251, causing the swing plate 22 to swing up and down relative to the fixed plate 21 around the swing axis 220, thereby adjusting the nozzle orientation of the cleaning medium supply member 24.

[0063] Optionally, such as Figure 7 and Figure 8 As shown, the rotating arm 254 is perpendicular to the output shaft of the rotary motor 251, with one end of the rotating arm 254 fixedly connected to the output shaft of the rotary motor 251, and the other end of the rotating arm 254 rotatably connected to the connecting rod 255, so as to limit the swing angle range of the swing plate 22 by the length of the rotating arm 254.

[0064] Furthermore, in the third example of this application, such as Figures 9 to 12As shown, the swing drive mechanism 25 may include a rotary motor 251 fixed to the fixed plate 21, a rotating arm 254 fixedly connected to the output shaft of the rotary motor 251, and a limiting arm 256 fixedly connected to the rotating arm 254; one end of the rotating arm 254 is fixedly connected to the output shaft of the rotary motor 251, and the other end of the rotating arm 254 is movably connected to a portion of the swing plate 22 that is offset from the swing axis 220; the limiting arm 256 may selectively abut against the fixed plate 21 and the swing plate 22 to limit the swing angle range of the swing plate 22. Thus, when the rotary motor 251 drives the rotating arm 254 to rotate, the rotating arm 254 directly drives the swing plate 22 away from or near the output shaft of the rotary motor 251, causing the swing plate 22 to swing up and down relative to the fixed plate 21 around the swing axis 220 to adjust the nozzle orientation of the cleaning medium supply component 24; at the same time, when the limiting arm 256 abuts against the fixed plate 21 or the swing plate 22, it prevents the rotating arm 254 from continuing to rotate, so as to limit the swing angle range of the swing plate 22.

[0065] Optionally, such as Figure 11 and Figure 12 As shown, the fixing plate 21 includes a mounting plate body 211 arranged parallel to the swing axis 220 and providing the clearance hole 210, a mounting bracket body 212 vertically fixed to the mounting plate body 211 and mounting the rotary motor 251, and a limiting block 213 protruding from the mounting bracket body 212; the rotating arm 254 and the limiting arm 256 extend backward from the output shaft of the rotary motor 251; when the output shaft of the rotary motor 251 rotates forward to drive the rotating arm 254 to swing the swing plate 22 downward to the limit position, the limiting arm 256 abuts against the limiting block 213, thereby limiting the lower limit swing angle of the swing plate 22.

[0066] Optionally, such as Figure 11 and Figure 12 As shown, the swing plate 22 includes a swing plate body 221 providing the swing axis 220 and a hinged frame 222 protruding from the swing plate body 221 and rotatably connected to the rotating arm 254. When the output shaft of the rotary motor 251 rotates in the reverse direction to drive the rotating arm 254 to swing the swing plate 22 upward to its limit position, the limiting arm 256 abuts against the swing plate body 221, thereby limiting the upper limit swing angle of the swing plate 22. It is understood that the reverse rotation mentioned in this application refers to the direction opposite to the forward rotation. For example, when the forward rotation is counterclockwise, the reverse rotation is clockwise.

[0067] Optionally, such as Figure 11 and Figure 12As shown, the hinge frame 222 has a waist-shaped hole 2220 extending in a direction parallel to the swing axis; the end of the rotating arm 254 is provided with a sliding shaft 2540 that can be rotatably inserted into the waist-shaped hole 2220, so as to realize the movable connection between the rotating arm 254 and the hinge frame 222 and avoid jamming.

[0068] It is worth noting that in the third example described above in this application, such as Figure 9 and Figure 10 As shown, the cleaning device 20 in the self-cleaning fan 1 may further include a protective cover 26 covering the fixed plate 21 to cover the rotary drive mechanism 23 and the oscillating drive mechanism 25, so as to ensure that the rotary drive mechanism 23 and the oscillating drive mechanism 25 work smoothly.

[0069] According to the above embodiments of this application, as Figures 1 to 10 As shown, the self-cleaning fan 1 may further include a support frame 30 that fixes the fixed plate 21 and the volute 11. The support frame 30 is located below the fixed plate 21 to support the fixed plate 21 while covering the cleaning medium supply component 24, which helps to protect the cleaning medium supply component 24.

[0070] 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.

[0071] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A self-cleaning fan, characterized in that, include: The main body of the fan includes a volute with a clearance hole and an impeller rotatably disposed within the volute; and The cleaning device includes a fixed plate fixed to the volute, a swing plate rotatably disposed on the fixed plate, a rotary drive mechanism mounted on the swing plate, a cleaning medium supply component driven by the rotary drive mechanism to enter and exit the volute through the clearance hole, and a swing drive mechanism mounted on the fixed plate and driven by the swing plate; the swing axis of the swing plate is relatively parallel to the central axis of the impeller, and the rotation axis of the rotary drive mechanism is located in a plane relatively perpendicular to the central axis of the impeller.

2. The self-cleaning fan according to claim 1, characterized in that, The swing axis of the swing plate is adjacent to the clearance hole arrangement of the volute.

3. The self-cleaning fan according to claim 2, characterized in that, The fixed plate has a clearance hole that matches the swing plate; when the included angle between the swing plate and the fixed plate is zero, the swing plate is located within the clearance hole of the fixed plate.

4. The self-cleaning fan according to claim 1, characterized in that, The swing drive mechanism includes a rotary motor fixed to the fixed plate, a cam fixedly connected to the output shaft of the rotary motor, and an elastic element disposed between the fixed plate and the swing plate; the part of the swing plate that is off the swing axis abuts against the outer periphery of the cam under the elastic force of the elastic element.

5. The self-cleaning fan according to claim 4, characterized in that, The cam is an eccentric wheel; the elastic element is a tension spring, and the two ends of the tension spring are respectively limited and connected to the fixed plate and the swing plate.

6. The self-cleaning fan according to claim 1, characterized in that, The swing drive mechanism includes a rotary motor fixed to the fixed plate, a rotating arm fixedly connected to the output shaft of the rotary motor, and a connecting rod disposed between the rotating arm and the swing plate; one end of the connecting rod is rotatably connected to a portion of the rotating arm that is offset from the output shaft, and the other end of the connecting rod is rotatably connected to a portion of the swing plate that is offset from the swing axis.

7. The self-cleaning fan according to claim 1, characterized in that, The swing drive mechanism includes a rotary motor fixed to the fixed plate, a rotating arm fixedly connected to the output shaft of the rotary motor, and a limiting arm fixedly connected to the rotating arm; one end of the rotating arm is fixedly connected to the output shaft of the rotary motor, and the other end of the rotating arm is movably connected to a portion of the swing plate that is offset from the swing axis; the limiting arm can selectively abut against the fixed plate and the swing plate to limit the swing angle range of the swing plate.

8. The self-cleaning fan according to claim 7, characterized in that, The fixed plate includes a mounting plate body arranged parallel to the swing axis, a mounting frame body vertically fixed to the mounting plate body and mounting the rotary motor, and a limiting block protruding from the mounting frame body; the rotating arm and the limiting arm extend backward from the output shaft of the rotary motor; when the output shaft of the rotary motor rotates in the forward direction to drive the rotating arm to swing the swing plate downward to the limit position, the limiting arm abuts against the limiting block; the swing plate includes a swing plate body providing the swing axis and a hinged frame body protruding from the swing plate body and rotatably connected to the rotating arm; when the output shaft of the rotary motor rotates in the reverse direction to drive the rotating arm to swing the swing plate upward to the limit position, the limiting arm abuts against the swing plate body.

9. The self-cleaning fan according to any one of claims 1 to 8, characterized in that, The volute includes an annular wall, a volute tongue protruding outward from the annular wall, and a pair of air inlet rings fixedly connected to both ends of the annular wall in the axial direction; the clearance hole is opened in the reflux area of ​​the annular wall; the cleaning medium supply component includes a moving part extending circumferentially along the rotation axis and a nozzle disposed at one end of the moving part; the rotary drive mechanism includes a rotary drive component fixedly mounted on the swing plate, a rotating shaft fixedly connected to the power output end of the rotary drive component and providing the rotation axis, and a connecting arm extending outward from the outer peripheral wall of the rotating shaft, the end of the connecting arm being fixedly connected to the moving part.

10. A range hood, characterized in that, include: case; and The self-cleaning fan as described in any one of claims 1 to 9, wherein the self-cleaning fan is assembled in the housing.

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