Fan and range hood

Abstract

The application discloses a fan and a range hood. The fan comprises a shell, an accommodating cavity in the shell, a first edge and a second edge opposite to each other on the bottom of the shell, an impeller in the accommodating cavity, blades capable of moving in a circumferential direction, a first circumferential movement and a second circumferential movement opposite to the first circumferential movement, and a liquid sprayer in the accommodating cavity and capable of spraying cleaning liquid to the blades. The cleaning liquid sprayed to the blades flows into the bottom of the shell and flows in the bottom of the shell under the traction formed by the circumferential movement of the blades. The application can clean the inner wall of the bottom of the shell and increase the cleaning range.

Description

Technical Field

[0001] This application relates to the technical field of cleaning the fan of a range hood, and in particular to a fan and a range hood. Background Technology

[0002] After prolonged use, grease accumulates on the impeller blades of a range hood. This buildup reduces the fan's performance and produces unpleasant odors, thus diminishing the user experience. Typically, the blades can be cleaned by spraying cleaning fluid through nozzles inside the fan.

[0003] However, the nozzle has a limited cleaning range and can only clean the blades, not the oil stains adhering to the inner wall of the fan casing (e.g., the housing). Summary of the Invention

[0004] This application addresses the shortcomings of existing methods by providing a fan and a range hood to solve the technical problem that the nozzles in the prior art have a small cleaning range, can only clean the blades, and cannot clean the oil stains adhering to the inner wall of the fan casing.

[0005] In a first aspect, embodiments of this application provide a fan, comprising: a housing having an internal accommodating cavity, wherein the bottom inner wall of the housing is formed as a liquid collecting recess, the liquid collecting recess including a first edge and a second edge disposed relatively far apart; an impeller disposed within the accommodating cavity and including blades capable of circumferential movement, the circumferential movement of the blades including a first circumferential movement and a second circumferential movement, the first circumferential movement and the second circumferential movement being opposite; and a spraying element disposed within the accommodating cavity and spraying cleaning liquid onto the blades; wherein the cleaning liquid sprayed onto the blades flows into the liquid collecting recess and, guided by the traction force generated by the circumferential movement of the blades, flows and scours within the liquid collecting recess.

[0006] As an optional implementation, the impeller further includes a blade support, with the blades evenly arranged circumferentially on the blade support. The midpoints between the points on the outer and inner radial edges of the blades are distributed circumferentially to form a circular midpoint line. The spraying component includes a nozzle, which is disposed on the arc-shaped section of the housing and close to the liquid collection recess. The nozzle faces the blades and is located at the intersection of the tangent of the lowest point of the circular midpoint line and the housing, so that the cleaning liquid is sprayed toward the lowest point of the circular midpoint line.

[0007] As an optional implementation, the arc-shaped section of the housing has a mounting hole that connects the accommodating cavity and the external environment, and the nozzle is fixed to the arc-shaped section of the housing through the mounting hole.

[0008] As an optional implementation, the impeller further includes a blade support, with the blades evenly arranged circumferentially on the blade support; the spraying component includes a nozzle, which is disposed inside the blade support so that the nozzle faces the blades, and the spraying direction of the cleaning liquid is at an angle to the vertical direction.

[0009] As an optional implementation, the spraying component further includes a nozzle mounting bracket, one end of which is fixed to the outside of the housing, and the other end of which is fixed to the nozzle and extends into the inside of the blade support.

[0010] As an optional implementation, the spraying component includes a nozzle disposed in the arcuate section of the housing and away from the liquid collection recess, the nozzle facing the blade, and the spraying direction of the cleaning liquid is at an angle to the vertical direction.

[0011] As an optional implementation, the liquid collecting recess is provided with a drain hole that connects the liquid collecting recess to the outside.

[0012] As an optional implementation, the leak is a through hole with a circular cross-section, the diameter of which is greater than or equal to 15 mm and less than or equal to 20 mm; the flow rate of the cleaning fluid leaking from the leak is greater than or equal to 10 ml per minute and less than or equal to 20 ml per minute.

[0013] As an optional implementation, the fan includes at least one of the following: the spray flow rate of the spray element 3 is greater than or equal to 750 ml / min and less than or equal to 1200 ml / min; the spray pressure of the spray element 3 is greater than or equal to 1 N and less than or equal to 3 N; the centrifugal force of the blades 21 in discharging the cleaning liquid is greater than or equal to 6 N and less than or equal to 10 N; and the rotational speed of the blades 21 is greater than or equal to 600 rpm and less than or equal to 1000 rpm.

[0014] Secondly, this application provides a range hood, including: the fan described in any of the foregoing embodiments of this application.

[0015] This application provides a fan and a range hood. The technical solution provided by the embodiments of this application brings at least the following beneficial effects:

[0016] The blades are rinsed by the impact force generated by the high-pressure spraying of cleaning fluid. The cleaning fluid sprayed on the blades flows into the liquid collection recess located on the inner wall of the bottom of the housing. Under the action of the blades moving alternately in opposite circumferential directions, a "wave-like" flush is formed in the liquid collection recess to clean the oil stains, thereby increasing the cleaning range and cleaning efficiency.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a fan provided in an embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the casing of a fan provided in an embodiment of this application.

[0021] Figure 3 This is a schematic diagram of a structure in which the spray direction of the cleaning fluid in the fan provided in this application is at an angle to the vertical direction.

[0022] Figure 4 This is a schematic diagram of the structure of a wind turbine in the axial section of the vertical blade support, provided in an embodiment of this application.

[0023] Figure 5 This is a schematic diagram of the impeller in a fan provided in an embodiment of this application.

[0024] Figure 6 This is a flowchart illustrating the fan control method provided in an embodiment of this application.

[0025] Figure 7 This is a flowchart illustrating steps S104-S106 of the fan control method provided in the embodiments of this application.

[0026] Figure 8 This is a flowchart illustrating steps S107-S108 of the fan control method provided in the embodiments of this application.

[0027] Figure 9 A schematic diagram of the specific process of step S108 in the fan control method provided in the embodiments of this application.

[0028] Figure 10 This is a flowchart illustrating steps S112-S113 of the fan control method provided in the embodiments of this application.

[0029] Figure labels and corresponding explanations:

[0030] 1: Shell; 11: Receiving cavity; 12: Bottom of shell; 13: Arc-shaped section; 14: Side plate;

[0031] 2: Impeller; 21: Blade; 22: Blade support;

[0032] 3: Spraying component; 31: Spray head; 32: Spray head mounting bracket;

[0033] L1: Outer edge;

[0034] L2: Inner edge line;

[0035] L3: Midpoint line of a circle;

[0036] L4: Tangent at the lowest point. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0038] like Figures 1 to 5 As shown, this application embodiment provides a fan, mainly including a housing 1, an impeller 2, and a liquid spraying component 3. The housing 1 has a receiving cavity 11 inside, and the bottom inner wall of the housing 1 is formed as the bottom 12 of the housing. The bottom 12 of the housing includes a first edge and a second edge that are relatively far apart. The impeller 2 is disposed in the receiving cavity 11 and includes blades 21 that can move circumferentially. The circumferential movement of the blades 21 includes a first circumferential movement and a second circumferential movement, which are opposite to each other. The liquid spraying component 3 is disposed in the receiving cavity 11 and sprays cleaning liquid onto the blades 21. The cleaning liquid sprayed onto the blades 21 flows into the bottom 12 of the housing and, guided by the traction force generated by the circumferential movement of the blades 21, flows and scours within the bottom 12 of the housing.

[0039] like Figures 1 to 5 As shown, in some possible embodiments, the fan is mounted on a horizontal plane, and the fan housing 1 is a volute. The profile of the volute is an Archimedean spiral, and the volute's shape resembles a snail shell, hence it is often simply referred to as a volute. The housing 1 mainly includes an arc-shaped segment 13 and side plates 14 disposed at both ends of the arc-shaped segment 13. The arc-shaped segment 13 of the housing 1 is a structure formed by an arc-shaped shell wall, and the bottom inner wall of the housing 1 is a part of the arc-shaped segment 13. The bottom 12 of the housing can be a part of the bottom inner wall of the housing 1. The bottom 12 of the housing has a concave surface, and the first edge (not shown) and the second edge (not shown) are respectively the edges of the concave surface that are relatively far away from each other.

[0040] The shell wall of the housing 1 forms a receiving cavity 11, and the blade 21 can move relative to the housing 1 in two opposite circumferential directions within the receiving cavity 11 to form two corresponding flushing stages.

[0041] In the first rinsing stage, the blade 21 moves along the first circumferential direction and generates a traction airflow along the first circumferential direction to form a traction force in the first circumferential direction; the spraying component 3 sprays cleaning liquid onto the moving blade 21 for rinsing. The cleaning liquid sprayed onto the moving blade 21 is thrown into the bottom 12 of the housing under the action of centrifugal force. The cleaning liquid that flows into the bottom 12 of the housing is guided by the traction force formed by the blade 21 moving along the first circumferential direction and flows along the concave surface of the bottom 12 of the housing towards the first edge to clean the oil stains on the flow path.

[0042] A second flushing stage is performed after the first flushing stage. In the second flushing stage, the blades 21 move along the second circumferential direction and generate a traction airflow along the second circumferential direction to form a traction force in the second circumferential direction; the spraying element 3 sprays cleaning fluid onto the moving blades 21 for flushing. The cleaning fluid sprayed onto the moving blades 21 is thrown into the bottom 12 of the housing under the action of centrifugal force. The cleaning fluid that flows into the bottom 12 of the housing (including the cleaning fluid that flows into the bottom 12 of the housing during the first flushing stage, and the cleaning fluid that flows into the bottom 12 of the housing after being sprayed onto the blades 21 moving along the second circumferential direction) is guided by the traction force formed by the blades 21 moving along the second circumferential direction and flows along the concave surface of the bottom 12 of the housing towards the second edge to clean the oil stains on the flow path.

[0043] The first rinsing stage can be repeated after the second rinsing stage to achieve multiple alternations between the first and second rinsing stages, so that the cleaning liquid in the bottom 12 of the housing is repeatedly flushed and flowed between the first edge and the second edge, generating hydrodynamics for cleaning oil stains, achieving a "wave-like" effect, and cleaning the oil stains accumulated in the bottom 12 of the housing.

[0044] The fan provided in this application embodiment uses the impact force generated by the high-pressure spraying of cleaning liquid by the spraying component 3 to flush the blades 21. The cleaning liquid sprayed on the blades 21 flows into the bottom 12 of the housing located on the inner wall of the bottom of the housing 1. Under the action of the blades 21 moving alternately in opposite circumferential directions, a "wave-like" flush is formed in the bottom 12 of the housing to clean the oil stains, thereby increasing the cleaning range and cleaning efficiency.

[0045] Optionally, the first circumference is clockwise and the second circumference is counterclockwise.

[0046] Optionally, the first circumference is counterclockwise and the second circumference is clockwise.

[0047] Alternatively, the cleaning solution can be water, a liquid cleaning agent, or a mixture of both water and a cleaning agent.

[0048] The spraying component 3 is disposed within the receiving cavity 11. The spraying component 3 can be positioned in various ways, which will be described in detail below.

[0049] like Figures 1 to 5 As shown, in an optional embodiment, the impeller 2 further includes a blade support 22. Blades 21 are uniformly arranged circumferentially on the blade support 22. The midpoints between the points on the outer edge line L1 (i.e., the circular outer periphery of the blade support 22) and the points on the inner edge line L2 of the blade 21 in the radial direction are distributed circumferentially to form a circular midpoint line L3. The spraying component 3 includes a nozzle 31, which is disposed on the arc-shaped segment 13 of the housing 1 and close to the bottom 12 of the housing. The nozzle 31 faces the blade 21 and is disposed at the intersection of the tangent line L4 at the lowest point of the circular midpoint line L3 and the housing 1, so that the cleaning liquid is sprayed toward the lowest point of the circular midpoint line L3.

[0050] In one possible embodiment, the blade 21 can be an arc-shaped sheet structure, and the blade support 22 can be a cylindrical structure. The length direction of the blade 21 is arranged along the axial direction of the blade support 22, and it is evenly arranged on the side of the blade support 22 along the circumference. The arc-shaped segment 13 of the housing 1 surrounds the outside of the blade 21 and forms a gap with the blade 21.

[0051] like Figure 4 As shown, in a cross-section perpendicular to the axial direction of the blade support 22, along the radial distribution of the circumference of the blade 21, the outer edge of the blade 21 is the edge closest to the shell wall of the housing 1, and the outer edge of the blade 21 is distributed circumferentially, forming a circular outer edge line L1; the inner edge of the blade 21 is the edge furthest from the shell wall of the housing 1, and the inner edge of the blade 21 is distributed circumferentially, forming a circular inner edge line L2. Along the radial distribution of the circumference of the blade 21, the midpoints between points on the outer edge line L1 and points on the inner edge line L2 are distributed circumferentially, forming a circular midpoint line L3, which lies between the circular outer edge line L1 and the circular inner edge line L2.

[0052] The nozzle 31 of the spraying component 3 can be inserted into the arc-shaped segment 13 of the housing 1, specifically at the intersection of the tangent L4 at the lowest point of the circular midpoint line L3 and the arc-shaped segment 13 of the housing 1. There are two intersections of the tangent L4 at the lowest point of the circular midpoint line L3 and the arc-shaped segment 13 of the housing 1.

[0053] In one specific embodiment, the nozzle 31 of the spraying component 3 is located at the intersection of the tangent L4 of the lowest point of the circular midpoint line L3 and the right side of the arc segment 13. This right intersection point is closer to the blade 21 than the left intersection point. The nozzle 31 is directed towards the lowest point of the circular midpoint line L3 located to the left of the nozzle 31, causing the cleaning liquid to be sprayed from right to left. During the clockwise movement of the blade 21, the direction of the high-pressure spray pressure of the cleaning liquid onto the blade 21 and the direction of the centrifugal force of the moving blade 21 are both directed away from the nozzle 31. This allows for the superposition of the spray pressure and the centrifugal force of the moving blade 21. The cleaning liquid sprayed onto the blade 21 can be thrown to the left side of the bottom 12 of the housing and is located at a higher position, that is, closer to the left edge of the bottom 12 of the housing, giving the cleaning liquid at this location higher potential energy. Under the traction force generated by the clockwise movement of the blade 21, the cleaning fluid can flow to a higher position on the left side along the concave surface of the bottom 12 of the shell, thereby increasing the cleaning area of ​​the cleaning fluid. During the counterclockwise movement of the blade 21, the cleaning fluid flows to the right side along the concave surface of the bottom 12 of the shell. The cleaning fluid with higher potential energy converts potential energy into more kinetic energy. Combined with the weight of the cleaning fluid itself, this can increase the flushing force of the cleaning fluid and form a "wave-like" surfing effect, thereby improving the flushing efficiency.

[0054] As an alternative implementation, the arc-shaped section 13 of the housing 1 is provided with a mounting hole that connects the accommodating cavity 11 and the external environment, and the nozzle 31 is fixed to the arc-shaped section 13 of the housing 1 through the mounting hole.

[0055] Based on the foregoing embodiments, a specific embodiment is provided. The mounting hole is a through hole penetrating the shell wall of the arc-shaped segment 13. The mounting hole can be opened at the intersection of the tangent L4 of the lowest point of the circular midpoint line L3 in the foregoing embodiments and the arc-shaped segment 13 of the shell 1. The axis of the mounting hole coincides with the tangent L4 of the lowest point of the circular midpoint line L3. The nozzle 31 can be a tubular structure. The axis of the nozzle 31 is set to coincide with the axis of the mounting hole, so that the spray direction of the nozzle 31 is directly opposite the tangent of the lowest point of the circular midpoint line L3.

[0056] The nozzle 31 includes a spray end and an inlet end. The spray end is disposed within the receiving cavity 11 through a mounting hole; the inlet end is located outside the receiving cavity 11 and is used to communicate with the infusion pipeline. The nozzle 31 can be fixed to the arc-shaped section 13 of the housing 1 by snap-fit, sealing connection or welding.

[0057] like Figure 3 As shown, in an optional embodiment, the impeller 2 further includes a blade support 22, with blades 21 uniformly arranged circumferentially on the blade support 22; the spraying component 3 includes a nozzle 31, which is disposed inside the blade support 22, facing the blades 21, and the spraying direction of the cleaning liquid is at an angle to the vertical direction.

[0058] Based on the foregoing embodiments, in another possible embodiment, the nozzle 31 of the spraying component 3 enters the inner side of the blade support 22 through one end of the blade support 22, and sprays the cleaning liquid onto the blade 21 from the inner side of the blade support 22. By making the spray direction of the cleaning liquid form a specific angle with the vertical direction, it is ensured that the spray pressure of the high-pressure spray of the cleaning liquid on the blade 21 and the centrifugal force of the moving blade 21 can be positively superimposed, thereby ensuring that the cleaning liquid that is thrown into the bottom 12 of the housing is at a higher position, thus ensuring that the cleaning liquid has higher gravitational potential energy and kinetic energy, thereby improving the cleaning area and cleaning effect.

[0059] like Figure 3 As shown, in an optional embodiment, the spraying component 3 also includes a nozzle mounting bracket 32, one end of which is fixed to the outside of the housing 1, and the other end of which is fixed to a nozzle 31 and extends into the inside of the blade support 22.

[0060] Based on the foregoing embodiments, a possible embodiment is provided: the nozzle mounting bracket 32 ​​includes a first section and a second section that are angled and fixedly connected to each other. The end of the second section away from the first section can be bolted to the outside of the housing 1. Specifically, the end of the second section away from the first section can be connected to the outside of the side plate 14 of the housing 1. The end of the first section away from the second section extends into the inside of the blade support 22, so that the nozzle 31 fixed to the end of the first section away from the second section faces the blade 21 inside the blade support 22.

[0061] In one specific embodiment, the nozzle 31 is disposed inside the blade support 22, and the cleaning fluid is sprayed in the rightward direction, forming an angle with the vertical direction of greater than or equal to 30 degrees and less than or equal to 40 degrees. In the first rinsing stage, the blade 21 moves clockwise, and the cleaning fluid is sprayed onto the blade 21 moving in the direction close to the bottom 12 of the housing; in the second rinsing stage, the blade 21 moves counterclockwise, and the cleaning fluid is sprayed onto the blade 21 moving in the direction away from the bottom 12 of the housing.

[0062] As an optional implementation, the spraying component 3 includes a nozzle 31 disposed on the arcuate section 13 of the housing 1 and away from the bottom 12 of the housing. The nozzle 31 faces the blade 21, and the spraying direction of the cleaning liquid is at an angle to the vertical direction.

[0063] Based on the foregoing embodiments, an embodiment is provided, which differs from the foregoing embodiments in that the position of the nozzle 31 and the position of the spray on the blade 21 are different. In this embodiment, the nozzle 31 is set on the arc segment 13 away from the bottom 12 of the housing, and the cleaning liquid is sprayed at the tangent of the lowest point of the circular midpoint line L3, and the spray direction of the cleaning liquid forms a specific angle with the vertical direction.

[0064] like Figure 4 As shown, in one specific embodiment, the nozzle 31 is located on the right side of the arcuate segment 13 away from the bottom 12 of the housing. The cleaning fluid is sprayed to the left, and the angle with the vertical direction is greater than or equal to 140 degrees and less than or equal to 150 degrees. In the first rinsing phase, the blades 21 move clockwise, and the cleaning fluid is sprayed onto the blades 21 moving in a direction close to the bottom 12 of the housing. In the second rinsing phase, the blades 21 move counterclockwise, and the cleaning fluid is sprayed onto the blades 21 moving in a direction away from the bottom 12 of the housing. The sprayed cleaning fluid falls to the bottom 12 of the housing through the gap between two adjacent blades 21, and is also thrown to the bottom 12 of the housing after the blades 21 move, forming a pooled liquid, which is used to clean oil stains by repeated rinsing.

[0065] As an alternative implementation, a drain hole (not shown) is provided in the bottom 12 of the housing to connect the bottom 12 of the housing with the outside.

[0066] The drain hole penetrates the shell wall of the housing 1 and is located at the lowest point of the bottom of the housing 1. The drain hole has two functions: leaking oil and leaking cleaning fluid.

[0067] As an optional implementation, the leak is a through hole with a circular cross-section, the diameter of which is greater than or equal to 15 mm and less than or equal to 20 mm; the flow rate of the cleaning fluid leaking from the leak is greater than or equal to 10 ml per minute and less than or equal to 20 ml per minute.

[0068] As an optional implementation, the fan includes at least one of the following:

[0069] The spray flow rate of the spray component 3 is greater than or equal to 750 ml / min and less than or equal to 1200 ml / min; the spray pressure of the spray component 3 is greater than or equal to 1 N and less than or equal to 3 N; the centrifugal force of the blade 21 in ejecting the cleaning liquid is greater than or equal to 6 N and less than or equal to 10 N; the rotational speed of the blade 21 is greater than or equal to 600 rpm and less than or equal to 1000 rpm.

[0070] In the cleaning mode of the range hood, the cleaning liquid flows out of the housing 1 through the drain hole after entering the bottom 12 of the housing. In order to ensure that there is enough cleaning liquid in the bottom 12 of the housing to form a flushing flow, in the first flushing stage and the second flushing stage, the amount of cleaning liquid entering the bottom 12 of the housing is greater than the amount flowing out of the housing 1 through the drain hole. In addition, the traction force generated by the moving blades 21 can "grab" the cleaning liquid and prevent the cleaning liquid from flowing out of the housing 1, so as to reduce the amount of cleaning liquid flowing out of the housing 1.

[0071] During long-term use of the range hood, some of the oil stains accumulated inside the housing 1 flow to the bottom 12 of the housing under the action of gravity and flow out of the housing 1 through the drain hole; however, the accumulated oil stains may cause oil leakage and blockage, which will reduce the smoke extraction volume of the fan and thus reduce the smoke extraction effect. In this application, the cleaning liquid is used to form multiple "undulating wave" flushing to remove oil stains near the drain hole to prevent oil leakage and blockage.

[0072] If the rotation speed of the blade 21 is low, the resulting traction force is small, which may lead to a large flow of cleaning fluid, resulting in less cleaning fluid in the bottom 12 of the housing and inability to effectively flush. If the rotation speed of the blade 21 is high, the resulting traction force is large, and the cleaning fluid flows along the bottom 12 of the housing to a higher position, which may easily cause leakage.

[0073] Based on the same inventive concept, this application provides a range hood, including the fan described in any of the foregoing embodiments of this application.

[0074] This application provides a fan and a range hood. The technical solution provided by the embodiments of this application brings at least the following beneficial effects:

[0075] The blades are rinsed by the impact force generated by the high-pressure spraying of cleaning fluid. The cleaning fluid sprayed on the blades flows into the liquid collection recess located on the inner wall of the bottom of the housing. Under the action of the blades moving alternately in opposite circumferential directions, a "wave-like" flush is formed in the liquid collection recess to clean the oil stains, thereby increasing the cleaning range and cleaning efficiency.

[0076] To facilitate understanding of this application, embodiments of this application also provide a control method for the aforementioned fan, the control method comprising steps S101-S103:

[0077] Step S101: Control the blade to move along the first circumferential direction, and control the spraying component to spray cleaning fluid onto the blade moving along the first circumferential direction.

[0078] In the first rinsing stage, the blade 21 moves along the first circumferential direction and generates a traction airflow along the first circumferential direction to form a traction force in the first circumferential direction; the spraying component 3 sprays cleaning liquid onto the moving blade 21 for rinsing. The cleaning liquid sprayed onto the moving blade 21 is thrown into the bottom 12 of the housing under the action of centrifugal force. The cleaning liquid that flows into the bottom 12 of the housing is guided by the traction force formed by the blade 21 moving along the first circumferential direction and flows along the concave surface of the bottom 12 of the housing towards the first edge to clean the oil stains on the flow path.

[0079] Step S102: Control the blade to move along the second circumferential direction, and control the spraying component to spray cleaning liquid onto the blade moving along the second circumferential direction.

[0080] A second flushing stage is performed after the first flushing stage. In the second flushing stage, the blades 21 move along the second circumferential direction and generate a traction airflow along the second circumferential direction to form a traction force in the second circumferential direction; the spraying element 3 sprays cleaning fluid onto the moving blades 21 for flushing. The cleaning fluid sprayed onto the moving blades 21 is thrown into the bottom 12 of the housing under the action of centrifugal force. The cleaning fluid that flows into the bottom 12 of the housing (including the cleaning fluid that flows into the bottom 12 of the housing during the first flushing stage, and the cleaning fluid that flows into the bottom 12 of the housing after being sprayed onto the blades 21 moving along the second circumferential direction) is guided by the traction force formed by the blades 21 moving along the second circumferential direction and flows along the concave surface of the bottom 12 of the housing towards the second edge to clean the oil stains on the flow path.

[0081] Step S103: Repeat the steps of controlling the blade to move along the first circumferential direction and controlling the spraying component to spray cleaning fluid onto the blade moving along the first circumferential direction until the conditions for the end of the rinsing stage are met.

[0082] The first rinsing stage can be repeated after the second rinsing stage to achieve multiple alternations between the first and second rinsing stages, so that the cleaning liquid in the bottom 12 of the housing is repeatedly flushed and flowed between the first edge and the second edge, generating hydrodynamics for cleaning oil stains, achieving a "wave-like" effect, and cleaning the oil stains accumulated in the bottom 12 of the housing.

[0083] Optionally, the first circumference is clockwise and the second circumference is counterclockwise.

[0084] Optionally, the first circumference is counterclockwise and the second circumference is clockwise.

[0085] Alternatively, the cleaning solution can be water, a liquid cleaning agent, or a mixture of both water and a cleaning agent.

[0086] The fan control method provided in this application embodiment uses the impact force generated by the high-pressure spraying of cleaning liquid from the spraying component 3 to flush the blades 21. The cleaning liquid sprayed on the blades 21 flows into the bottom 12 of the housing located on the inner wall of the bottom of the housing 1. Under the action of the blades 21 moving alternately in opposite circumferential directions, a "wave-like" flush is formed in the bottom 12 of the housing to clean the oil stains, thereby increasing the cleaning range and cleaning efficiency.

[0087] As an optional implementation, the fan further includes a drive motor electrically connected to and controlling the blades; the spraying element includes a pump body for controlling on / off switching; the aforementioned S101 of controlling the blades to move along a first circumferential direction and controlling the spraying element to spray cleaning liquid onto the blades moving along the first circumferential direction includes:

[0088] Turn on the drive motor to control the blades to move along the first circumferential direction, and simultaneously turn on the pump body to control the spraying component to spray cleaning fluid.

[0089] After the drive motor and pump body have been running for a preset first working time, the drive motor and pump body are turned off.

[0090] At the start of the first rinsing stage, the drive motor controls the blades 21 to move along the first circumferential direction, while simultaneously controlling the pump body to spray cleaning fluid onto the moving blades 21, thus rinsing the blades. The cleaning fluid sprayed onto the blades is thrown to the bottom of the housing by the centrifugal force of the blades and flows along the concave surface of the bottom of the housing towards the first edge. After the drive motor is turned off, the blades 21 decelerate along the first circumferential direction due to inertia. The cleaning fluid in the bottom 12 of the housing can fall along the concave surface of the bottom 12 of the housing and concentrate at the lowest point of the bottom 12 of the housing.

[0091] As an optional implementation, the aforementioned S102, which controls the movement of the blades along the second circumferential direction and controls the spraying element to spray cleaning fluid onto the blades moving along the second circumferential direction, includes:

[0092] After the drive motor and pump body are turned off, the timer starts, and at the end of the preset first interval, the drive motor is turned on again to control the blades to move along the second circumferential direction, and at the same time the pump body is turned on to control the spraying component to spray cleaning fluid.

[0093] After the drive motor and pump body have been running for a preset first working time, the drive motor and pump body are turned off again.

[0094] The drive motor is restarted to control the blades 21 to move along the second circumferential direction, and the pump body is simultaneously activated to spray cleaning fluid onto the moving blades 21, thereby re-rinsing the blades. The cleaning fluid sprayed onto the blades 21 flows into the bottom 12 of the housing and flows along the concave surface of the bottom of the housing to flush the second edge. Within a preset first interval, the rotational speed of the blades 21 moving along the first circumferential direction has been reduced to a safe starting speed, which can avoid damage to the fan caused by the high speed when the drive motor is restarted for reversal.

[0095] like Figure 7 As shown, in one optional embodiment, the fan further includes a drive motor, which is electrically connected to and controls the blades; the liquid spraying component includes a pump body for controlling on / off switching; the fan control method further includes steps S104-S106:

[0096] Step S104: Collect the current operating current sequence of the pump body according to the preset collection period.

[0097] The current operating current sequence is the operating current sequence corresponding to either the first flushing stage or the second flushing stage.

[0098] Optionally, the sum of the first working duration and the first interval duration is equal to the aforementioned acquisition period, and synchronous sampling is performed after the pump body is turned on to ensure the correspondence between the acquisition period and the circumferential movement, thereby ensuring the validity and correspondence of the current working current sequence.

[0099] Optionally, the first working time is greater than or equal to 7 seconds and less than or equal to 9 seconds.

[0100] Optionally, the first interval duration is greater than or equal to 1 second and less than or equal to 3 seconds.

[0101] Step S105: If the largest current value in the current operating current sequence is greater than or equal to the preset current value, then repeat the step of collecting the current operating current sequence of the pump body according to the preset collection period.

[0102] Step S106: If the largest current value in the current operating current sequence is less than the preset current value, then shut down the pump body and the drive motor.

[0103] During operation, when the voltage is constant but the actual operating power varies, the operating current will differ for different flow rates of cleaning fluid. By collecting the current operating current sequence of the pump, it can be determined whether and how much cleaning fluid is being injected into the housing 1; that is, the current operating current reflects the amount of cleaning fluid entering the housing 1.

[0104] The preset current value is the operating current value corresponding to the normal supply of cleaning fluid. During the sampling period, there may not be a continuous or sufficient flow of cleaning fluid. If the maximum current value in the current operating current sequence is greater than or equal to the preset current value, it indicates that the supply of cleaning fluid during the current sampling period is in a normal supply state, that is, the flow rate of the nozzle 31 reaches the preset supply flow rate.

[0105] If the maximum current value in the current working current sequence is less than the preset current value, it indicates that the supply of cleaning fluid in the current acquisition cycle is in an abnormal supply state, that is, the flow rate of the nozzle 31 is not up to the preset supply flow rate, the cleaning fluid container connected to the nozzle 31 lacks cleaning fluid, and effective cleaning cannot be completed. In this case, the pump body and drive motor need to be turned off. After turning off the pump body and drive motor, a cleaning termination signal can also be output to remind the user to replenish the cleaning fluid.

[0106] like Figure 8 As shown, as an optional implementation, the fan control method further includes steps S107-S108:

[0107] Step S107: Record the number of times the step of repeatedly executing the step of collecting the current working current sequence of the pump body according to the preset acquisition cycle is repeated.

[0108] Step S108: If the number of repetitions exceeds the preset alarm count, shut down the pump and drive motor.

[0109] Since the bottom of the housing can only hold a limited amount of cleaning fluid (e.g., 70 ml), excessive fluid can cause a strong scouring flow, leading to fluid overflow and increased noise. The capacity of the cleaning fluid at the bottom of housing 1 and the amount supplied each time can be preset. This allows us to determine the number of times the pump controls the fluid supply to reach the preset capacity. By recording the number of times the pump's current operating current sequence is repeatedly collected according to a preset collection period, the normal supply frequency of the pump can be determined. If the recorded number exceeds the preset warning capacity, the cleaning fluid capacity at the bottom of housing 1 has reached its peak, and the pump and drive motor can be shut down.

[0110] like Figure 9 As shown, in an optional implementation, if the aforementioned step S108 is repeated more than a preset alarm count, after shutting down the pump and drive motor, the fan control method further includes steps S109-S111:

[0111] Step S109: Turn on the drive motor to control the blade to move along the first circumferential direction for a preset second working time, and turn off the drive motor when the second working time ends.

[0112] During the second working period, the drive motor controls the blades 21 to move along the first circumferential direction, causing the cleaning fluid in the bottom 12 of the housing to move towards the first edge.

[0113] Step S110: After the preset second interval duration ends, turn on the drive motor to control the blade to move along the second circumferential direction for a preset second working time, and turn off the drive motor when the second working time ends.

[0114] In this step, after the second interval has ended, the rotational speed of the circumferentially moving blades 21 has been reduced to a safe starting speed to avoid damage to the fan caused by high rotational speed reversal. By restarting the drive motor, the blades 21 are controlled to move in the opposite circumferential direction, causing the cleaning fluid in the bottom 12 of the housing to flow in the corresponding flushing flow direction.

[0115] Step S111: After the second interval period ends, repeat the steps of turning on the drive motor to control the blade to move along the first circumferential direction for a preset second working time, and turning off the drive motor at the end of the second working time, until the end conditions of the rinsing stage are met.

[0116] In this step, after the drive motor is turned off, the blade 21 decelerates along the second circumferential direction due to inertia.

[0117] Optionally, the first working time is equal to the second working time.

[0118] Optionally, the duration of the first interval is equal to the duration of the second interval.

[0119] Optionally, the first working time is equal to the second working time.

[0120] Optionally, the duration of the first interval is equal to the duration of the second interval.

[0121] like Figure 9 As shown, as an optional implementation, the fan control method further includes steps S112-S113:

[0122] Step S112: Record the number of times the step of repeatedly turning on the drive motor to control the blade to move along the first circumferential direction for a preset second working time, and turning off the drive motor at the end of the second working time is executed.

[0123] Step S113: If the number of recorded times exceeds the preset limit, then turn off the drive motor.

[0124] If the number of recorded times exceeds the preset limit, it means that after the blade 21 moves alternately along the first and second circumferential directions multiple times, the oil stains in the bottom 12 of the housing have been cleaned by repeated rinsing with cleaning fluid, so the drive motor is turned off to end the cleaning process.

[0125] As an optional implementation, if the number of recorded times in step S113 exceeds a preset limit, the fan control method further includes the following steps after shutting down the drive motor:

[0126] After a preset third interval, the drive motor is turned on and operates according to the preset spin-drying control strategy until the spin-drying end condition is met.

[0127] After cleaning the oil stains, there is still cleaning fluid inside the blades and housing. To prevent the cleaning fluid from splashing out when the user uses the fan immediately, a drying process is required to improve the user experience.

[0128] As an optional implementation, the aforementioned steps include activating the drive motor and operating according to a preset spin-drying control strategy until the spin-drying end condition is met, including:

[0129] Turn on the drive motor and control the blades to run at three speeds for the first duration;

[0130] At the end of the first duration, the blades are controlled to run at the second speed for the second duration;

[0131] At the end of the second duration, the blades are controlled to run at the first speed for the third duration;

[0132] At the end of the third duration, the drive motor is turned off and the timer starts again;

[0133] At the end of the fourth duration, the blades are controlled to run at the first speed for the fifth duration;

[0134] At the end of the fifth hour, the drive motor is turned off and the timer is started;

[0135] At the end of the sixth time period, the blades are controlled to run at the first speed for the seventh time period;

[0136] At the end of the seventh hour, turn off the drive motor to end the drying process;

[0137] Among them, the first duration is greater than the third duration, the third duration is greater than the second duration, the second duration is greater than the fifth duration, the fifth duration is greater than the sixth duration, the sixth duration is equal to the seventh duration, and the seventh duration is greater than the fourth duration; the third gear speed is greater than the second gear speed, and the second gear speed is greater than the first gear speed.

[0138] In one specific embodiment, the drive motor controls the blade 21 to move sequentially along the first circumference at three speeds for 30 seconds, at second speed for 5 seconds, and at first speed for 15 seconds, with a one-second interval, then at first speed for 4 seconds, with a two-second interval, then at first speed for 2 seconds, and then the drive motor is turned off.

[0139] As an optional implementation, before the aforementioned step S101 of controlling the blades to move along the first circumferential direction and controlling the spray nozzle to spray cleaning fluid onto the blades moving along the first circumferential direction, the fan control method further includes:

[0140] Control the blades to move along the first circumferential direction and reach the preset speed.

[0141] The blade 21 is controlled by a drive motor to move along the first circumference and the speed reaches a preset speed. The preset speed is the working speed of the blade 21. Before spraying the cleaning fluid, the speed of the blade 21 reaches the preset speed, so that the cleaning fluid sprayed on the blade 21 can fall directly onto the higher part of the bottom 12 of the housing, thereby improving the cleaning efficiency.

[0142] Optionally, the preset speed is greater than or equal to 600 rpm and less than or equal to 1000 rpm.

[0143] Optionally, the preset speed is greater than or equal to 800 rpm and less than or equal to 900 rpm.

[0144] As an optional implementation method, the fan control method further includes:

[0145] The control and reminder device outputs a cleaning end signal according to a preset reminder strategy to remind the user that cleaning is complete.

[0146] In one specific embodiment, the buzzer is controlled to continuously play a prompt tone at a frequency of one sound per second for 5 seconds, with a prompt tone duration of 0.5 seconds and a frequency of 1 Hz, to remind the user that the cleaning is finished.

[0147] After reminding the user that cleaning is complete, the range hood can also be put into standby mode.

[0148] As an optional implementation method, the fan control method further includes:

[0149] Detect the current duration the pump has been in the off state;

[0150] If the current duration exceeds the preset warning duration, the drive motor will be turned off.

[0151] This step determines whether the pump is operating normally. If the current duration exceeds the preset alarm duration, a pump malfunction is detected, preventing normal cleaning. Therefore, the drive motor is shut down. After shutting down the drive motor, a fault alarm signal can be output to remind the user to replace the pump.

[0152] It should be understood that, although Figure 6 , 7 The steps in flowchart 10 are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order in which these steps are performed; they can be executed in other orders. Furthermore, Figures 6 to 10 At least some of the steps in the process may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but may be executed at different times. The execution order of these steps or stages is not necessarily sequential, but may be executed in turn or alternately with other steps or at least some of the steps or stages in other steps.

[0153] It is understood that the same / similar parts between the various embodiments of the methods described above in this specification can be referred to each other. Each embodiment focuses on the differences from other embodiments, and relevant parts can be referred to the description of other method embodiments.

[0154] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0155] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0156] 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.

[0157] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A fan, characterized in that, include: The housing (1) has an internal cavity (11), and the bottom (12) of the housing includes a first edge and a second edge that are relatively far apart. The bottom (12) of the housing has a concave surface, and the first edge and the second edge are respectively the edges of the concave surface that are relatively far apart. An impeller (2) is disposed within the accommodating cavity (11) and includes blades (21) capable of circumferential movement. The midpoints of points on the outer radial line (L1) and the inner radial line (L2) of the blades (21) are distributed circumferentially, forming a circular midpoint line (L3). The circumferential movement of the blades (21) includes a first circumferential movement and a second circumferential movement, the first and second circumferential movements being opposite. The spraying component (3) is disposed in the accommodating cavity (11) and sprays cleaning liquid onto the blade (21), the cleaning liquid being sprayed toward the lowest point of the circular midpoint line (L3); The spraying component (3) includes a nozzle (31), which is located on the arc-shaped section (13) of the housing (1) and close to the bottom (12) of the housing. The nozzle (31) faces the blade (21) and is located at the intersection of the tangent (L4) of the lowest point of the circular midpoint line (L3) and the housing (1). The cleaning liquid sprayed on the blade (21) flows into the bottom (12) of the housing and is flushed and flows in the bottom (12) of the housing under the guidance of the traction force formed by the circumferential movement of the blade (21).

2. The fan according to claim 1, characterized in that, The impeller (2) also includes a blade support (22), and the blades (21) are evenly arranged on the blade support (22) in the circumferential direction.

3. The fan according to claim 2, characterized in that, The arc-shaped section (13) of the housing (1) is provided with an installation hole that connects the accommodating cavity (11) and the external environment. The nozzle (31) is fixed to the arc-shaped section (13) of the housing (1) through the installation hole.

4. The fan according to claim 1, characterized in that, The bottom (12) of the housing has a hole that connects the bottom (12) of the housing to the outside.

5. The fan according to claim 4, characterized in that, The leak is a through hole with a circular cross-section, the diameter of which is greater than or equal to 15 mm and less than or equal to 20 mm; the flow rate of the cleaning fluid leaking from the leak is greater than or equal to 10 ml per minute and less than or equal to 20 ml per minute.

6. The fan according to any one of claims 1-5, characterized in that, Includes at least one of the following: The spray flow rate of the spraying component (3) is greater than or equal to 750 ml per minute and less than or equal to 1200 ml per minute; The spray pressure of the spraying component (3) is greater than or equal to 1 Newton and less than or equal to 3 Newtons; The centrifugal force of the cleaning liquid ejected by the blade (21) is greater than or equal to 6 Newtons and less than or equal to 10 Newtons; The rotational speed of the blade (21) is greater than or equal to 600 revolutions per minute and less than or equal to 1000 revolutions per minute.

7. A range hood, characterized in that, include: The wind turbine as described in any one of claims 1 to 6.

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