Self-cleaning fan, range hood, and self-cleaning method for range hood

Abstract

The present invention relates to a self-cleaning fan, a range hood, and a self-cleaning method for a range hood, so as to reduce the impact blind area and improve the oil stain cleaning ability. The self-cleaning fan includes: a fan main body, the fan main body includes a volute and an impeller rotatably disposed in the volute, and a plurality of blades are circumferentially provided on the impeller; a cleaning device, the cleaning device includes a cleaning medium supply member disposed relative to the volute, the cleaning medium supply member has a plurality of spray lines for spraying a cleaning medium along the spray lines onto the blades; wherein the radial perpendicular distances between the plurality of the spray lines of the cleaning medium supply member and the axis of the impeller are different from each other.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and particularly to a self-cleaning fan, a range hood, and a self-cleaning method for a range hood. Background Art

[0002] With the continuous progress of the self-cleaning technology of range hoods, steam cleaning or water cleaning has been widely used in the self-cleaning field of range hoods. Its basic principle is that a steam generator generates steam or a water pump pumps water, and the cleaning medium such as steam or water is transported to the nozzle at the end of the spray pipe and quickly sprayed out from the nozzle to wash the impeller for cleaning.

[0003] Currently, during the self-cleaning process, since the impeller is constantly rotating, the nozzles in existing range hoods only need to move in the same horizontal plane, so that the jet flow formed by spraying the cleaning medium through the nozzles moves along the axial direction of the impeller, and the cleaning of all blades in the impeller can be achieved; that is to say, the distance between the moving plane of the nozzles in existing range hoods and the axis of the impeller is fixed, that is, the cleaning surface height of the nozzles in existing range hoods is fixed.

[0004] However, in order to better extract oil fumes, a plurality of non-straight sheet-shaped blades are usually densely arranged in the circumferential direction of the impeller. However, the area directly washed by the jet flow (referred to as the impact area) during the cleaning of such blades is only a part of the area on the currently cleaned blade, because not only the area near the outer edge of the currently cleaned blade cannot be directly washed by the jet flow due to the blockage of the outer edge, but also the area near the inner edge of the currently cleaned blade cannot be directly washed by the jet flow due to the occlusion of the previous cleaned blade, resulting in a large impact blind area (i.e., the area that cannot be directly washed by the jet flow) near the inner and outer edges of such blades, affecting the oil stain cleaning ability of the range hood. Summary of the Invention

[0005] In view of this, it is necessary to provide a self-cleaning fan, a range hood, and a self-cleaning method for a range hood to reduce the impact blind area and improve the oil stain cleaning ability in response to the above problems.

[0006] Another advantage of the present invention is to provide a self-cleaning fan, a range hood, and a self-cleaning method for a range hood. In one embodiment of the present invention, the self-cleaning fan can provide a plurality of spray rays with a variable distance from the axis of the impeller to increase the impact area on the blades and reduce the impact blind area.

[0007] Another advantage of the present invention lies in providing a self-cleaning fan, a range hood, and a self-cleaning method for a range hood. Among them, in one embodiment of the present invention, the self-cleaning fan can use a nozzle that moves radially to spray columnar jets at different cleaning heights to form multiple non-overlapping impact sub-regions, reducing the impact blind spots.

[0008] Another advantage of the present invention lies in providing a self-cleaning fan, a range hood, and a self-cleaning method for a range hood. Among them, in one embodiment of the present invention, the self-cleaning fan can make the impact sub-regions formed by the jets with different cleaning heights not overlap completely, so as to avoid wasting resources due to repeated impact on the same area of the blade.

[0009] Another advantage of the present invention lies in providing a self-cleaning fan, a range hood, and a self-cleaning method for a range hood. To achieve the above object, in the present invention, there is no need to use expensive materials or complex structures. Therefore, the present invention successfully and effectively provides a solution, not only providing a simple self-cleaning fan, a range hood, and a self-cleaning method for a range hood, but also increasing the practicability and reliability of the self-cleaning fan, the range hood, and the self-cleaning method for a range hood.

[0010] To achieve at least one of the above advantages or other advantages and objects of the present invention, the present invention provides a self-cleaning fan, comprising:

[0011] A fan main body, the fan main body includes a volute and an impeller rotatably disposed in the volute, and a plurality of blades are provided in the circumferential direction of the impeller;

[0012] A cleaning device, the cleaning device includes a cleaning medium supply member disposed relative to the volute, the cleaning medium supply member has a plurality of spray lines for spraying the cleaning medium along the spray lines onto the blades; wherein the radial perpendicular distances between the plurality of spray lines of the cleaning medium supply member and the axis of the impeller are different from each other.

[0013] According to an embodiment of the present application, the cleaning medium supply member has a first spray line and a second spray line, and the radial perpendicular distance between the first spray line and the axis of the impeller is greater than the radial perpendicular distance between the second spray line and the axis of the impeller.

[0014] According to one embodiment of the present application, when the cleaning medium supply member sprays the cleaning medium along the first spray line and the second spray line respectively, the distance between the impact starting point of the first spray line on the cleaning surface of the blade and the outer edge of the blade is greater than or equal to the distance between the impact ending point of the second spray line on the cleaning surface of the blade and the outer edge of the blade.

[0015] According to one embodiment of the present application, the cleaning device further includes a radial driving mechanism that is transmission-connected to the cleaning medium supply member, and the cleaning medium supply member moves between a first cleaning height and a second cleaning height under the drive of the radial driving mechanism. When the cleaning medium supply member is moved to the first cleaning height, the cleaning medium supply member is used to spray the cleaning medium along the first spray line; when the cleaning medium supply member is moved to the second cleaning height, the cleaning medium supply member is used to spray the cleaning medium along the second spray line.

[0016] According to one embodiment of the present application, the radial drive mechanism includes a drive motor, a transmission gear fixed to the output shaft of the drive motor, and a transmission rack meshing with the transmission gear, the drive motor is connected to the cleaning medium supply member, and the transmission rack is fixed relative to the volute.

[0017] According to one embodiment of the present application, the cleaning device further includes an axial driving mechanism drivingly connected to the cleaning medium supply member, and the cleaning medium supply member rotates relative to the volute under the drive of the axial driving mechanism, so as to make the spray line of the cleaning medium supply member reciprocate between the axial ends of the impeller.

[0018] According to one embodiment of the present application, the axial drive mechanism includes a rotating motor and a rotating seat, one end of the rotating seat is fixedly connected to the rotating shaft of the rotating motor, and the other end of the rotating seat is fixedly connected to the cleaning medium supply member; the cleaning device further includes a bracket assembly, the bracket assembly includes a fixed bracket fixed to the volute and a movable bracket movably arranged on the fixed bracket, the driving motor and the rotating motor are installed on the movable bracket, and the transmission rack is fixed to the fixed bracket.

[0019] According to one embodiment of the present application, the bracket assembly further includes a guide member arranged between the fixed bracket and the movable bracket; the guide member includes a guide column fixed to the fixed bracket and a guide sleeve fixed to the movable bracket, and the guide sleeve can be slidably mounted on the guide column.

[0020] According to an embodiment of the present application, the bracket assembly further includes an elastic member disposed between the fixed bracket and the movable bracket to balance the gravity of the movable bracket, the driving motor, the axial driving mechanism, and the cleaning medium supply member by the elastic force of the elastic member.

[0021] According to another aspect of the present application, the present application further provides an oil fume extractor, including:

[0022] a housing; and

[0023] the self-cleaning fan described in any one of the above, and the self-cleaning fan is assembled in the housing.

[0024] According to another aspect of the present application, the present application further provides a self-cleaning method for an oil fume extractor, including the steps of:

[0025] Controlling the cleaning medium supply member to cause the cleaning medium supply member to spray the cleaning medium along a plurality of spray lines onto the blades of the impeller, wherein the radial perpendicular distances between the plurality of spray lines and the axis of the impeller are different from each other.

[0026] According to an embodiment of the present application, the self-cleaning method for an oil fume extractor further includes the steps of:

[0027] Rotating the cleaning medium supply member through the axial driving mechanism to cause each spray line of the cleaning medium supply member to reciprocate between the two axial ends of the impeller.

[0028] According to an embodiment of the present application, the step of controlling the cleaning medium supply member to cause the cleaning medium supply member to spray the cleaning medium along a plurality of spray lines onto the blades of the impeller, wherein the radial perpendicular distances between the plurality of spray lines and the axis of the impeller are different from each other, includes the steps of:

[0029] Moving the cleaning medium supply member to a first cleaning height through the radial driving mechanism to cause the cleaning medium supply member to spray the cleaning medium along a first spray line; and

[0030] Moving the cleaning medium supply member to a second cleaning height through the radial driving mechanism to cause the cleaning medium supply member to spray the cleaning medium along a second spray line, wherein the radial perpendicular distance between the first spray line and the axis of the impeller is greater than the radial perpendicular distance between the second spray line and the axis of the impeller.

[0031] In summary, the self-cleaning fan of the present application can form a plurality of non-overlapping impact sub-regions on the cleaning surface of each blade through a plurality of spray lines with different radial perpendicular distances, thereby forming a relatively large impact area on the cleaning surface of each blade, reducing the impact blind area, and improving the oil stain cleaning ability. Description of the Drawings

[0032] Figure 1 Schematic perspective view of a range hood according to an embodiment of the present invention;

[0033] Figure 2 Schematic cross-sectional view of the range hood according to the above embodiment of the present application;

[0034] Figure 3 Schematic view of the cleaning state of the self-cleaning fan in the range hood according to the above embodiment of the present application when spraying the cleaning medium along the first spray line;

[0035] Figure 4 Schematic view of the cleaning state of the self-cleaning fan in the range hood according to the above embodiment of the present application when spraying the cleaning medium along the second spray line;

[0036] Figure 5 Schematic view of the cleaning result of each blade in the self-cleaning fan according to the above embodiment of the present application;

[0037] Figure 6 Schematic diagram of an example of the cleaning device in the self-cleaning fan according to the above embodiment of the present application;

[0038] Figure 7 is Figure 6 exploded view of the cleaning device in;

[0039] Figure 8 Schematic view of the state where the cleaning medium supply member in the cleaning device according to the above embodiment of the present application switches between the first cleaning height and the second cleaning height;

[0040] Figure 9 Schematic view of the state where the cleaning device according to the above embodiment of the present application performs full-area cleaning;

[0041] Figure 10 Schematic flow chart of a self-cleaning method for a range hood according to an embodiment of the present invention;

[0042] Figure 11 Schematic flow chart of the control step in the self-cleaning method for a range hood according to the above embodiment of the present application.

[0043] Main component symbols: 1. Self-cleaning fan; 10. Fan body; 11. Volute; 110. Give way hole; 12. Impeller; 120. Blade; 120a. Current cleaning blade; 120b. Last cleaning blade; 121. Inner edge; 122. Outer edge; 123. Cleaning surface; 20. Cleaning device; 21. Cleaning medium supply member; 210. Spray line; 210a. First spray line; 210b. Second spray line; 211. Transport moving part; 212, nozzle; 22, radial driving mechanism; 221, driving motor; 2210, output shaft; 222, transmission gear; 223, transmission rack; 23, axial driving mechanism; 231, rotating motor; 2310, rotating shaft; 232, rotating seat; 24, bracket assembly; 241, fixed bracket; 242, movable bracket; 243, guide member; 2431, guide column; 2432, guide sleeve; 244, elastic member; 2, shell.

[0044] The above description of the main component symbols is combined with the accompanying drawings and specific implementation methods to further illustrate the present invention in detail. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0048] Considering that the jet flow formed by spraying the cleaning medium in the existing range hoods usually only moves along the axial direction of the impeller, and a plurality of non-straight sheet-like blades are usually densely arranged in the circumferential direction of the impeller, resulting in a large impact blind area in the areas near the inner and outer edges of such blades, which affects the oil stain cleaning ability of the range hood. To solve this problem, the present application provides a self-cleaning fan, a range hood, and a self-cleaning method for a range hood, which can reduce the impact blind area and improve the oil stain cleaning ability.

[0049] Specifically, as Figure 1 and Figure 2 shown, an embodiment of the present application provides a range hood, which may include a housing 2 and a self-cleaning fan 1 assembled to the housing 2 for sucking oil fumes. It can be understood that the range hood of the present application may also but is not limited to include a water tank, a steam generator, a water receiving box, and / or a sensor to assist in completing the oil fume suction function, which will not be elaborated herein.

[0050] More specifically, as Figures 1 to 5 shown, the self-cleaning fan 1 may include a fan main body 10 and a cleaning device 20. The fan main body 10 may include a volute 11 and an impeller 12 rotatably disposed in the volute 11, and a plurality of blades 120 are provided in the circumferential direction of the impeller 12. The cleaning device 20 may include a cleaning medium supply member 21 disposed relative to the volute 11, and the cleaning medium supply member 21 has a plurality of spray lines 210 for spraying the cleaning medium along the spray lines 210 onto the blades 120. The radial perpendicular distances between the plurality of spray lines 210 of the cleaning medium supply member 21 and the axis O of the impeller 12 are different from each other. It can be understood that the spray line 210 mentioned in the present application may refer to the spraying path of the cleaning medium supply member 21, that is, the trajectory line formed by the cleaning medium sprayed by the cleaning medium supply member 21; the plurality of spray lines 210 mentioned in the present application may refer to two or more spray lines 210; the radial perpendicular distance mentioned in the present application refers to the shortest distance between the spray line 210 and the central axis of the impeller 12.

[0051] It should be noted that when the self-cleaning fan 1 performs self-cleaning, the impeller 12 needs to rotate so that all the blades 120 successively align with the spray lines 210 of the cleaning medium supply member 21, so that the cleaning medium sprayed by the cleaning medium supply member 21 can directly wash the cleaning surfaces of each blade 120, so as to form an impact area on the cleaning surface of each blade 120. Since the impact sub-areas formed by each spray line 210 on each blade 120 will change with the change of the radial vertical distance, where as the radial vertical distance becomes larger, the position of the impact sub-area is closer to the outer edge of the blade 120, and as the radial vertical distance becomes smaller, the position of the impact sub-area is closer to the inner edge of the blade 120. Therefore, in this application, multiple spray lines 210 with different radial vertical distances can form multiple non-overlapping impact sub-areas on the cleaning surface of each blade 120, and then form an impact area with a larger area on the cleaning surface of each blade 120, thereby reducing the impact blind area and improving the oil stain cleaning ability. It can be understood that the impact sub-area mentioned in this application refers to the area directly impacted by the cleaning medium sprayed along each spray line on the cleaning surface of the blade; the impact area mentioned in this application refers to the set formed by the combination of multiple impact sub-areas, that is, the union of multiple impact sub-areas; in addition, multiple impact sub-areas can be spaced apart or partially overlapped, as long as they do not overlap (that is, do not completely overlap).

[0052] Exemplarily, as Figures 3 to 5 shown, the blade 120 has an inner edge 121 close to the axis O of the impeller 12, an outer edge 122 far from the axis O of the impeller 12, and a cleaning surface 123 that extends concavely from the inner edge 121 to the outer edge 122. Preferably, the cleaning surface 123 of the blade 120 is implemented as a concave arc surface. It can be understood that when the impeller 12 of this application rotates along the direction facing the cleaning surface 123 during cleaning, so that the cleaning surface of the currently cleaned blade rotates towards the direction close to the cleaning medium supply member 21, which is beneficial to increasing the impact force of the cleaning medium and improving the cleaning effect.

[0053] For the convenience of description, as Figure 3 and Figure 4 shown, taking the cleaning medium supply member 21 having a first spray line 210a and a second spray line 210b as an example, where the radial vertical distance R1 between the first spray line 210a and the axis O of the impeller 12 is greater than the radial vertical distance R2 between the second spray line 210b and the axis O of the impeller 12, that is, R1 > R2.

[0054] When the currently cleaned blade 120a of the impeller 12 rotates to as Figure 3When at the solid line position shown, the current cleaning blade 120a starts to be directly impacted by the cleaning medium sprayed along the first spray line 210a. At this time, the first spray line 210a is tangent to the previous cleaning blade 120b of the impeller 12 and extends to the starting impact point A of the current cleaning blade 120a; thereafter, as the impeller 12 further rotates, the impact position of the first spray line 210a on the cleaning surface 123 of the current cleaning blade 120a continuously moves outward (i.e., continuously moves in the direction close to the outer edge 122 of the current cleaning blade 120a), until the current cleaning blade 120a rotates to the Figure 3 dashed line position shown, the current cleaning blade 120a stops being directly impacted by the cleaning medium sprayed along the first spray line 210a. At this time, the outer edge 122 of the current cleaning blade 120a of the impeller 12 intersects with the first spray line 210a and extends to the ending impact point B of the current cleaning blade 120a; thereafter, as the impeller 12 further rotates, the cleaning surface 123 of the current cleaning blade 120a cannot be directly impacted by the cleaning medium sprayed along the first spray line 210a. In other words, the area on the cleaning surface 123 of the current cleaning blade 120a between the starting impact point A and the ending impact point B is the impact sub-region AB corresponding to the first spray line 210a on the current cleaning blade 120a.

[0055] Similarly, when the current cleaning blade 120a of the impeller 12 rotates to the solid line position shown in Figure 4 , the current cleaning blade 120a starts to be directly impacted by the cleaning medium sprayed along the second spray line 210b. At this time, the second spray line 210b is tangent to the previous cleaning blade 120b of the impeller 12 and extends to the starting impact point C of the current cleaning blade 120a; thereafter, as the impeller 12 further rotates, the impact position of the second spray line 210b on the cleaning surface 123 of the current cleaning blade 120a continuously moves outward (i.e., continuously moves in the direction close to the outer edge 122 of the current cleaning blade 120a), until the current cleaning blade 120a rotates to the Figure 4 dashed line position shown, the current cleaning blade 120a stops being directly impacted by the cleaning medium sprayed along the second spray line 210b. At this time, the outer edge 122 of the current cleaning blade 120a of the impeller 12 intersects with the second spray line 210b and extends to the ending impact point D of the current cleaning blade 120a; thereafter, as the impeller 12 further rotates, the cleaning surface 123 of the current cleaning blade 120a cannot be directly impacted by the cleaning medium sprayed along the second spray line 210a. In other words, the area on the cleaning surface 123 of the current cleaning blade 120a between the starting impact point C and the ending impact point D is the impact sub-region CD corresponding to the second spray line 210a on the current cleaning blade 120a.

[0056] In summary, as Figure 5 shown, an impact sub-region AB near the outer edge 122 and an impact sub-region CD near the inner edge 121 are formed on the cleaning surface 123 of each blade 120. Then, the impact region formed on the cleaning surface 123 of each blade 120 is formed by the merger of the impact sub-region AB corresponding to the first spray ray 210a and the impact sub-region CD corresponding to the second spray ray 210b. It can be understood that since the radial vertical distance R1 corresponding to the first spray ray 210a is not equal to the radial vertical distance R2 corresponding to the second spray ray 210b, the impact sub-region AB and the impact sub-region CD will surely not completely overlap, making the area of the impact region larger than the area of any one of the impact sub-region AB and the impact sub-region CD, which helps to reduce the area of the impact blind zone and improve the oil stain cleaning ability of the self-cleaning fan 1.

[0057] Preferably, the distance S1 between the impact starting point A of the first spray ray 210a on the cleaning surface 123 of the blade 120 and the outer edge 122 of the blade 120 is less than or equal to the distance S2 between the impact ending point D of the second spray ray 210a on the cleaning surface 123 of the blade 120 and the outer edge 122 of the blade 120, so that the impact sub-region AB corresponding to the first spray ray 210a and the impact sub-region CD corresponding to the second spray ray 210b do not overlap, that is, the area of the impact region on the cleaning surface 123 of the blade 120 is equal to the sum of the area of the impact sub-region AB and the area of the impact sub-region CD, to maximize the area of the impact region and avoid the cleaning medium sprayed along the first spray ray 210a and the cleaning medium sprayed along the second spray ray 210b from repeatedly impacting the same part of the cleaning surface 123 of the blade 120, which helps to save resources and avoid waste of water resources. It can be understood that the distance S1 mentioned in this application may refer to the arc length between the impact starting point A on the cleaning surface 123 of the blade 120 and the outer edge 122; in addition, in other examples of this application, the distance S1 between the impact starting point A of the first spray ray 210a on the cleaning surface 123 of the blade 120 and the outer edge 122 of the blade 120 may also be greater than the distance S2 between the impact ending point D of the second spray ray 210a on the cleaning surface 123 of the blade 120 and the outer edge 122 of the blade 120, so that the impact sub-region AB and the impact sub-region CD partially overlap, and this application will not elaborate on this.

[0058] More preferably, as Figure 5As shown, the distance S1 between the impact starting point A of the first spray line 210a on the cleaning surface 123 of the blade 120 and the outer edge 122 of the blade 120 is greater than the distance S2 between the impact ending point D of the second spray line 210a on the cleaning surface 123 of the blade 120 and the outer edge 122 of the blade 120, such that the impact sub-regions AB corresponding to the first spray line 210a and the impact sub-regions CD corresponding to the second spray line 210b are spaced apart from each other. This can not only avoid repeated cleaning of the same part on the cleaning surface 123 of the blade 120, saving resources; but also the region DA on the cleaning surface 123 of the blade 120 between the impact sub-region AB and the impact sub-region CD can be flushed by the cleaning medium sprayed along the first spray line 210a, so as to make full use of the residual kinetic energy of the cleaning medium after impacting the blade 120, facilitating further improvement of the oil stain cleaning ability of the self-cleaning fan 1.

[0059] It should be noted that, in order for the cleaning medium supply member 21 to provide multiple spray lines 210 with different radial vertical distances, in one example of the present application, the cleaning medium supply member 21 can use a nozzle that moves radially relative to the impeller 12 to spray the cleaning medium at different positions to provide multiple spray lines 210. For the sake of easy explanation and understanding, the spray lines mentioned in this example of the present application refer to the linear trajectories formed by the cleaning medium sprayed by the cleaning medium supply member 21 towards the impeller 12 in space; in addition, for the spray lines mentioned in the present application, they can be simulated by means of laser. For example, replace the outlet position of the cleaning medium supply member with a laser emitter. When the impeller rotates, the light ray where the emitted laser is located is the spray line. The area formed by the laser emitted at the same cleaning height hitting the blade to be cleaned can be understood as the impact sub-region referred to in the present application, and the sum of the areas formed by the laser emitted at different cleaning heights hitting the blade to be cleaned can be understood as the impact region referred to in the present application. For the same blade, the starting impact point where the laser emitted by the laser emitter hits the blade is the point A in Figure 3 or the point C in Figure 4 , and the ending impact point where the laser emitted by the laser emitter hits the blade is the point B in Figure 3 or the point D in Figure 4 , then the impact region mentioned in the present application is the union of the impact sub-region AB and the impact sub-region CD.

[0060] Of course, in other examples of the present application, the cleaning medium supply member 21 can also use multiple nozzles arranged radially relative to the impeller 12 to spray the cleaning medium respectively to provide multiple spray lines 210, or can also use a nozzle (such as a slit nozzle) to spray a linear jet flow diverging radially along the impeller 12 to provide multiple spray lines 210.

[0061] Exemplarily, as Figure 2 , Figure 6 and Figure 8 shown, the cleaning device 20 may further include a radial driving mechanism 22 drivingly connected to the cleaning medium supply member 21. The cleaning medium supply member 21 moves between a first cleaning height and a second cleaning height under the drive of the radial driving mechanism 22. As Figure 3 and Figure 8 shown, when the cleaning medium supply member 21 is moved to the first cleaning height, the spray line 210 of the cleaning medium supply member 21 is implemented as a first spray line 210a for spraying the cleaning medium along the first spray line 210a to form an impact sub-region AB corresponding to the first spray line 210a on the cleaning surface 123 of the blade 120; as Figure 4 and Figure 8 shown, when the cleaning medium supply member 21 is moved to the second cleaning height, the spray line 210 of the cleaning medium supply member 21 is implemented as a second spray line 210b for spraying the cleaning medium along the second spray line 210b to form an impact sub-region CD corresponding to the second spray line 210b on the cleaning surface 123 of the blade 120. It can be understood that the cleaning height mentioned in the present application may refer to the radial vertical distance between the spray line 210 and the axis O of the impeller 12.

[0062] Optionally, as Figure 6 and Figure 7 shown, the radial driving mechanism 22 may include a driving motor 221, a transmission gear 222 fixedly disposed on the output shaft 2210 of the driving motor 221, and a transmission rack 223 engaged with the transmission gear 222. The driving motor 221 is connected to the cleaning medium supply member 21, and the transmission rack 223 is fixedly disposed relative to the volute 11. In this way, when the driving motor 221 is controlled to drive the transmission gear 222 to rotate, the transmission gear 222 rolls along the transmission rack 223 to drive the cleaning medium supply member 21 to move along the extending direction of the transmission rack 223 through the driving motor 221, so that the cleaning medium supply member 21 moves between the first cleaning height and the second cleaning height. It can be understood that in other examples of the present application, the transmission rack 223 may be connected to the cleaning medium supply member 21, and the driving motor 221 is fixedly disposed relative to the volute 11, and can drive the cleaning medium supply member 21 to move between the first cleaning height and the second cleaning height through the transmission rack 223 under the drive of the driving motor 221; of course, the transmission gear 222 and the transmission rack 223 in the present application may also be implemented as other rotation-linear conversion mechanisms, as long as the cleaning medium supply member 21 can be moved between the first cleaning height and the second cleaning height under the driving action of the driving motor 221, and the present application will not elaborate on this.

[0063] It should be noted that since the cleaning medium ejected through the cleaning medium supply member 21 usually forms a columnar jet, in order to ensure that the cleaning range of the cleaning medium can cover the entire impeller 12, as Figure 6 and Figure 9 shown, the cleaning medium supply member 21 of the present application can be rotatably arranged relative to the volute 11, so that the columnar jet formed by ejecting the cleaning medium through the cleaning medium supply member 21 reciprocates between the two axial ends of the impeller 12.

[0064] Optionally, as Figure 6 and Figure 7 shown, the cleaning device 20 can further include an axial drive mechanism 23 that is drivingly connected to the cleaning medium supply member 21. The cleaning medium supply member 21 rotates relative to the volute 11 under the drive of the axial drive mechanism 23, so as to make the spray line 210 of the cleaning medium supply member 21 reciprocate between the two axial ends of the impeller 12, so that the jet formed by ejecting the cleaning medium through the cleaning medium supply member 21 reciprocates between the two axial ends of the impeller 12, thereby realizing the full-range cleaning of the entire impeller 12.

[0065] Optionally, as Figure 6 and Figure 7 shown, the axial drive mechanism 23 can include a rotary motor 231 and a rotating seat 232. One end of the rotating seat 232 is fixedly connected to the rotating shaft 2310 of the rotary motor 231, and the other end of the rotating seat 232 is fixedly connected to the cleaning medium supply member 21. In this way, the rotating seat 232 drives the cleaning medium supply member 21 to rotate around the rotating shaft 2310 under the drive of the rotary motor 231, so that the columnar jet formed by ejecting the cleaning medium through the cleaning medium supply member 21 reciprocates between the two axial ends of the impeller 12. It can be understood that the axis line of the rotating shaft 2310 of the rotary motor 231 of the present application is used as the rotation axis of the cleaning medium supply member 21.

[0066] Optionally, the axis line of the rotating shaft 2310 of the rotary motor 231 is skew perpendicular to the axis line of the impeller 12, ensuring that the jet formed by the cleaning medium ejected through the cleaning medium supply member 21 can move along the axial direction of the impeller 12, so that each spray line of the cleaning medium supply member 21 forms a cleaning surface parallel to the axis line of the impeller 12, ensuring that the cleaning medium ejected along the spray line forms the same flushing area at different axial positions of each blade 120, so as to improve the consistency of the axial cleaning effect of the entire impeller 12.

[0067] Optionally, as Figure 6 and Figure 7As shown, the cleaning device 20 may further include a bracket assembly 24, and the bracket assembly 24 may include a fixed bracket 241 fixedly provided on the volute 11 and a movable bracket 242 movably arranged on the fixed bracket 241. The driving motor 221 and the rotating motor 231 are mounted on the movable bracket 242, and the transmission rack 223 is fixedly provided on the fixed bracket 241. In this way, when the driving motor 221 drives the transmission gear 222 to rotate, the transmission gear 222 rolls on the transmission rack 223 to drive the movable bracket 242 to move relative to the fixed bracket 241 through the driving motor 221. Furthermore, the axial driving mechanism 23 moves with the movable bracket 242 to drive the cleaning medium supply member 21 to move relative to the volute 11, so that the cleaning medium supply member 21 moves between the first cleaning height and the second cleaning height. In addition, when the rotating motor 231 drives the rotating seat 232 to rotate, the rotating seat 232 will drive the cleaning medium supply member 21 to rotate around the rotating shaft 2310, so that the columnar jet formed by spraying the cleaning medium through the cleaning medium supply member 21 reciprocates between the axial two ends of the impeller 12.

[0068] Optionally, as Figure 6 and Figure 7 shown, the bracket assembly 24 may further include a guide member 243 disposed between the fixed bracket 241 and the movable bracket 242 to limit the moving direction of the movable bracket 242 relative to the fixed bracket 241 through the guide member 243. Preferably, the guiding direction of the guide member 243 is the same as the extending direction of the rotating shaft 2310 of the rotating motor 231, so as to improve the radial moving efficiency of the cleaning medium supply member 21.

[0069] Optionally, as Figure 6 and Figure 7 shown, the guide member 243 includes a guide post 2431 fixedly provided on the fixed bracket 241 and a guide sleeve 2432 fixedly provided on the movable bracket 242. The guide sleeve 2432 is slidably sleeved on the guide post 2431, so that the guide sleeve 2432 slides along the guide post 2431 to achieve the required guiding effect.

[0070] Optionally, as Figure 6 and Figure 7As shown, the support assembly 24 may further include an elastic member 244 disposed between the fixed support 241 and the movable support 242, so as to balance the gravity of the movable support 242, the drive motor 221, the axial drive mechanism 23 and the cleaning medium supply member 21 through the elastic force of the elastic member 244, so as to reduce the workload of the drive motor 221. Preferably, the elastic member 244 is implemented as a spring sleeved on the guide column 2431. It can be understood that the movable bracket 242 of the present application is located above the fixed bracket 241, so that the spring is implemented as a compression spring, the upper end of the spring can be against the fixed bracket 241, and the lower end of the spring can be against the guide sleeve 2432 or the movable bracket 242; of course, in other examples of the present application, the movable bracket 242 can also be located below the fixed bracket 241, so that the spring is implemented as a tension spring, at this time, the upper end of the spring can be fixedly connected to the fixed bracket 241 or the guide column 2431, and the lower end of the spring can be fixedly connected to the guide sleeve 2432 or the movable bracket 242.

[0071] In addition, in other examples of the present application, the elastic member 244 can also be replaced by a magnetic member to balance the gravity of the movable bracket 242, the drive motor 221, the axial drive mechanism 23 and the cleaning medium supply member 21 through the magnetic force of the magnetic member, and this application will not go into details.

[0072] According to the above embodiments of the present application, Figure 6 and Figure 7 As shown, the cleaning medium supply member 21 may include a moving portion 211 fixed to the rotating seat 232 and a nozzle 212 disposed at the free end of the moving portion 211. Figure 9 As shown, the moving part 211 extends along the circumferential direction of the rotating shaft 2310 of the rotating motor 231, and the nozzle 212 tilts outward from the free end of the moving part 211, that is, the angle β between the spray line 210 of the nozzle 212 and the tangent of the moving part 211 at the free end is greater than 0° and less than or equal to 90°. In this way, compared with the solution in which the nozzle 212 extends along the circumferential direction or tangential direction of the moving part 211, when the cleaning medium supply member 21 is rotated to clean the entire blade 120, the average distance between the nozzle 212 and the blade 120 in this embodiment of the present application is shorter, which helps to reduce the loss of flushing force.

[0073] It is worth noting that Figure 2 As shown, the volute 11 is provided with a clearance hole 110, and the moving part 211 of the cleaning medium supply member 21 is rotated around the rotating shaft 2310 to drive the nozzle 212 to pass through the clearance hole 110 and enter and exit the volute 11 to form a penetration part. Figure 9As shown, when it is necessary to clean the impeller 12, rotate the moving part 211 of the cleaning medium supply member 21 around the rotating shaft 2310, so as to drive the nozzle 212 to extend into the volute 11 through the relief hole 110 and spray the cleaning medium onto the blade 120; and after the nozzle 212 passes through the relief hole 110, it makes a swinging motion (that is, reciprocates within a certain angle range around the rotating shaft 2310), so that the spray line 210 reciprocates between the two axial ends of the impeller 12, thereby realizing the full-range cleaning of the impeller 12; and when it is not necessary to clean the impeller 12, rotate the moving part 211 of the cleaning medium supply member 21 to drive the nozzle 212 to withdraw from the volute 11 through the relief hole 110, so as to prevent the nozzle 212 from being blocked by the oil stain in the volute 11.

[0074] Optionally, the moving part 211 can be implemented as an arc-shaped rigid pipe, so as to stably support the nozzle 212 and convey the cleaning medium to the nozzle 212 while minimizing the opening size of the relief hole 110 as much as possible; for example, the moving part 211 can be made of a hollow pipe made of hard materials such as plastics, metals or polymer materials, but is not limited thereto.

[0075] It is worth mentioning that according to another aspect of the present application, as Figure 10 shown, an embodiment of the present application further provides a self-cleaning method, which may include the steps:

[0076] S100: Control the cleaning medium supply member so that the cleaning medium supply member sprays the cleaning medium onto the blades of the impeller along a plurality of spray lines respectively, wherein the radial vertical distances between the plurality of spray lines and the axis of the impeller are different from each other.

[0077] It should be noted that in the above embodiment of the present application, as Figure 10 shown, the self-cleaning method for the range hood may further include the steps:

[0078] S200: Rotate the cleaning medium supply member through the axial drive mechanism so that each spray line of the cleaning medium supply member reciprocates between the two axial ends of the impeller.

[0079] Optionally, as Figure 11 shown, step S100 of the self-cleaning method for the range hood may include the steps:

[0080] S110: Move the cleaning medium supply member to the first cleaning height through the radial drive mechanism so that the cleaning medium supply member sprays the cleaning medium along the first spray line; and

[0081] S120: Through this radial driving mechanism, move the cleaning medium supply member to the second cleaning height so that the cleaning medium supply member sprays the cleaning medium along the second spray line, where the radial vertical distance between the first spray line and the axis of the impeller is greater than the radial vertical distance between the second spray line and the axis of the impeller.

[0082] Preferably, when the cleaning medium supply member rotates forward (such as Figure 5 the clockwise direction shown) under the drive of the axial driving mechanism, the cleaning medium supply member moves to the second cleaning height under the drive of the radial driving mechanism, so that the second spray line of the cleaning medium supply member moves from the left end of the impeller to the right end of the impeller; when the cleaning medium supply member rotates backward (such as Figure 5 the counterclockwise direction shown) under the drive of the axial driving mechanism, the cleaning medium supply member moves to the first cleaning height under the drive of the radial driving mechanism, so that the first spray line of the cleaning medium supply member moves from the right end of the impeller to the left end of the impeller. In this way, when the cleaning medium supply member reciprocally rotates once under the drive of the axial driving mechanism, the cleaning medium supply member can spray the cleaning medium along the second spray line and the first spray line respectively to each blade, so as to efficiently achieve the full-range cleaning of the entire impeller.

[0083] More preferably, when the cleaning medium supply member rotates forward, the nozzle of the cleaning medium supply member can enter the volute through the relief hole to start cleaning; when the cleaning medium supply member rotates backward, the nozzle of the cleaning medium supply member can exit the volute through the relief hole to stop cleaning. In this way, during the entire process of the cleaning medium supply member spraying the cleaning medium to clean the impeller, the cleaning medium supply member first sprays the cleaning medium along the second spray line with a smaller radial vertical distance to form an impact sub-region near the inner edge of the blade on the cleaning surface of the blade; then sprays the cleaning medium along the second spray line with a larger radial vertical distance to form an impact sub-region near the outer edge of the blade on the cleaning surface of the blade; that is to say, the cleaning medium sprayed by the cleaning medium supply member first directly impacts the part near the inner edge of the cleaning surface of the blade, and then directly impacts the part near the outer edge of the cleaning surface of the blade, which helps to enhance the oil removal effect.

[0084] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should all be considered as the scope recorded in this specification.

[0085] The above embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. Self-cleaning fan, characterized in that, include: A fan body, the fan body comprising a volute and an impeller rotatably disposed in the volute, wherein a plurality of blades are disposed in a circumferential direction of the impeller; A cleaning device, the cleaning device comprising a cleaning medium supply member arranged relative to the volute, the cleaning medium supply member having a plurality of spray lines for spraying cleaning medium onto the blades along the spray lines; wherein radial vertical distances between the plurality of spray lines of the cleaning medium supply member and the axis of the impeller are different from each other; The cleaning medium supply member has a first spray line and a second spray line, wherein a radial vertical distance between the first spray line and the axis of the impeller is greater than a radial vertical distance between the second spray line and the axis of the impeller; When the cleaning medium supply member sprays the cleaning medium along the first spray line and the second spray line respectively, the distance between the impact starting point of the first spray line on the cleaning surface of the blade and the outer edge of the blade is less than or equal to the distance between the impact ending point of the second spray line on the cleaning surface of the blade and the outer edge of the blade; The spray line is the trajectory line formed by the cleaning medium sprayed through the cleaning medium supply member; the radial vertical distance is the shortest distance between the spray line and the central axis of the impeller; the impact starting point is the impact point of the current cleaning blade extended from the spray line when it is tangent to the previous cleaning blade of the impeller; the impact ending point is the impact point of the current cleaning blade extended from the spray line when it intersects the outer edge of the current cleaning blade.

2. The self-cleaning fan according to claim 1, wherein, The cleaning device further includes a radial driving mechanism drivingly connected to the cleaning medium supply member, and the cleaning medium supply member is driven by the radial driving mechanism to move between a first cleaning height and a second cleaning height. When the cleaning medium supply member is moved to the first cleaning height, the cleaning medium supply member is used to spray the cleaning medium along the first spray line; when the cleaning medium supply member is moved to the second cleaning height, the cleaning medium supply member is used to spray the cleaning medium along the second spray line.

3. The self-cleaning fan according to claim 2, wherein The radial drive mechanism includes a drive motor, a transmission gear fixed to an output shaft of the drive motor, and a transmission rack meshed with the transmission gear. The drive motor is connected to the cleaning medium supply member, and the transmission rack is fixed relative to the volute.

4. The self-cleaning fan according to claim 3, characterized in that, The cleaning device further includes an axial driving mechanism drivingly connected to the cleaning medium supply member, and the cleaning medium supply member rotates relative to the volute under the drive of the axial driving mechanism, so as to make the spray line of the cleaning medium supply member reciprocate between the axial ends of the impeller.

5. The self-cleaning fan according to claim 4, wherein The axial driving mechanism includes a rotating motor and a rotating seat. One end of the rotating seat is fixedly connected to the rotating shaft of the rotating motor, and the other end of the rotating seat is fixedly connected to the cleaning medium supply member. The cleaning device further includes a bracket assembly, which includes a fixed bracket fixedly arranged on the volute and a movable bracket movably arranged on the fixed bracket. The driving motor and the rotating motor are installed on the movable bracket, and the transmission rack is fixedly arranged on the fixed bracket.

6. The self-cleaning fan according to claim 5, wherein, The bracket assembly further includes a guiding member arranged between the fixed bracket and the movable bracket. The guiding member includes a guiding column fixedly arranged on the fixed bracket and a guiding sleeve fixedly arranged on the movable bracket. The guiding sleeve is slidably sleeved on the guiding column.

7. The self-cleaning fan according to claim 6, wherein, The bracket assembly further includes an elastic member arranged between the fixed bracket and the movable bracket to balance the gravity of the movable bracket, the driving motor, the axial driving mechanism, and the cleaning medium supply member through the elastic force of the elastic member.

8. Range hood, characterized in that, Comprising: A housing; And The self-cleaning fan according to any one of claims 1 to 7, and the self-cleaning fan is assembled in the housing.

9. A self-cleaning method for a range hood, characterized in that, Including the steps of: Controlling the cleaning medium supply member to cause the cleaning medium supply member to spray the cleaning medium along a plurality of spray lines onto the blades of the impeller respectively, wherein the radial perpendicular distances between the plurality of spray lines and the axis of the impeller are different from each other; The cleaning medium supply member has a first spray line and a second spray line, and the radial perpendicular distance between the first spray line and the axis of the impeller is greater than the radial perpendicular distance between the second spray line and the axis of the impeller; When the cleaning medium supply member sprays the cleaning medium along the first spray line and the second spray line respectively, the distance between the impact starting point of the first spray line on the cleaning surface of the blade and the outer edge of the blade is less than or equal to the distance between the impact ending point of the second spray line on the cleaning surface of the blade and the outer edge of the blade; The spray line is the trajectory line formed by the cleaning medium sprayed by the cleaning medium supply member; the radial perpendicular distance is the shortest distance between the spray line and the central axis of the impeller; the impact starting point is the impact point where the spray line extends to the current cleaning blade when it is tangent to the previous cleaning blade of the impeller; the impact ending point is the impact point where the spray line extends to the current cleaning blade when it intersects with the outer edge of the current cleaning blade.

10. The self-cleaning method for a range hood according to claim 9, wherein, Further including the steps of: Rotating the cleaning medium supply member through the axial driving mechanism to cause each spray line of the cleaning medium supply member to reciprocate between the two axial ends of the impeller.

11. The self-cleaning method for a range hood according to claim 9 or 10, characterized in that, The step of controlling the cleaning medium supply member to cause the cleaning medium supply member to spray the cleaning medium along a plurality of spray lines onto the blades of the impeller respectively, wherein the radial perpendicular distances between the plurality of spray lines and the axis of the impeller are different from each other, includes the steps of: Moving the cleaning medium supply member to a first cleaning height through the radial driving mechanism to cause the cleaning medium supply member to spray the cleaning medium along the first spray line; And Through this radial drive mechanism, move the cleaning medium supply member to the second cleaning height so that the cleaning medium supply member sprays the cleaning medium along the second spray line, wherein the radial vertical distance between the first spray line and the axis of the impeller is greater than the radial vertical distance between the second spray line and the axis of the impeller.

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