Base station for surface cleaning device

Abstract

The utility model provides a base station for a surface cleaning device, and belongs to the technical field of cleaning electric appliances. The base station for the surface cleaning device comprises a base station body, a centrifugal fan and an air duct, an air inlet, an air outlet and an air outlet cavity are formed in the base station body, the air duct communicates with the air outlet cavity through the air outlet, the centrifugal fan is suitable for guiding airflow to the air duct from the air inlet, and in the flowing direction of the airflow, the air duct comprises a drainage section and a gradual expansion section which are sequentially connected; the divergent section is communicated with the air outlet, and the drainage section is obliquely deflected in the direction opposite to the spiral direction of a volute of the centrifugal fan. According to the base station for the surface cleaning device, the problem that the drying effect is not ideal due to the fact that dry airflow at the air outlet cavity of the base station is not evenly distributed can be solved.

Description

Technical Field

[0001] The present application belongs to the technical field of cleaning appliances, and in particular relates to a base station for a surface cleaning device. Background Art

[0002] With the continuous advancement of cleaning equipment technology, various surface cleaning devices, such as sweeping robots and handheld cleaning devices, have become part of people's daily lives. These cleaning devices are equipped with cleaning parts that are used to make wet contact with the surface to be cleaned to achieve a cleaning effect. After use, there is usually residual water on the cleaning parts. If they are not dried, bacteria will grow and odor will be produced.

[0003] The base station of the existing cleaning equipment has the function of drying the cleaning components, that is, a centrifugal fan is installed in the base station to generate airflow, and then the airflow is guided to the air outlet cavity through the air duct to dry the cleaning components.

[0004] CN220321947U discloses a surface cleaning device for drying cleaning parts, wherein the drainage section and the gradually expanding section of the air duct are bilaterally symmetrical structures, and the air outlet position of the centrifugal fan corresponds to the central axis of the air duct. However, the airflow generated by the centrifugal fan tends to deviate to one side, which may cause uneven distribution of the airflow discharged from the air outlet cavity, thereby affecting the drying effect on the cleaning parts. Utility Model Content

[0005] The present application provides a base station for a surface cleaning device to solve the problem of uneven distribution of drying airflow at an air outlet cavity of the base station, resulting in an unsatisfactory drying effect.

[0006] The technical solution adopted in this application is:

[0007] An embodiment of the present application provides a base station for a surface cleaning device, a base station body, a centrifugal fan and an air duct, wherein the base station body is provided with an air inlet, an air outlet and an air outlet cavity, the air duct is connected with the air outlet cavity through the air outlet, the centrifugal fan is suitable for guiding the airflow from the air inlet to the air duct, and along the flow direction of the airflow, the air duct includes a guide section and a gradually expanding section connected in sequence, the gradually expanding section is connected with the air outlet, wherein the guide section is tilted and deflected in a direction opposite to the spiral direction of the volute of the centrifugal fan.

[0008] The base station for a surface cleaning device provided by the present application also includes the following additional technical features:

[0009] According to one embodiment of the present application, the angle between the extension direction of the guide section and the spiral direction of the volute of the centrifugal fan is less than or equal to 90°, and the angle between the extension direction of the guide section and the horizontal direction is an obtuse angle, so as to correct the flow direction of the airflow.

[0010] According to one embodiment of the present application, the guide section forms a first projection area on the radial air outlet surface along a direction perpendicular to the radial air outlet surface of the centrifugal fan, wherein at least a portion of the first projection area is located on the side opposite to the spiral direction of the volute of the centrifugal fan.

[0011] According to one embodiment of the present application, along a direction perpendicular to the radial air outlet surface of the centrifugal fan, the windward side wall of the guide section forms a second projection area on the radial air outlet surface, and the leeward side wall of the guide section forms a third projection area on the radial air outlet surface;

[0012] Wherein, the second projection area is located within the range of the air outlet end surface of the centrifugal fan;

[0013] At least a portion of the third projection area is located outside the range of the air outlet end surface of the centrifugal fan and is located on the side opposite to the spiral direction of the volute of the centrifugal fan.

[0014] According to an embodiment of the present application, the exhaust surface of the air outlet is parallel to the radial outlet surface, and the angle between the extension direction of the guide section and the exhaust surface is less than 90°.

[0015] According to an embodiment of the present application, a first air guide plate extending from the guide section to the gradually expanding section is provided in the air duct, the first air guide plate divides the air duct into a first flow channel and a second flow channel, and an air inlet area of ​​an air inlet end of the first flow channel is larger than an air inlet area of ​​an air inlet end of the second flow channel;

[0016] The first flow channel extends obliquely in a direction opposite to the spiral direction of the volute of the centrifugal fan, and the second flow channel extends obliquely in a direction identical to the spiral direction of the volute of the centrifugal fan.

[0017] According to an embodiment of the present application, a second air guide plate spaced apart from the first air guide plate is provided in the second flow channel;

[0018] The second air guide plate divides the second flow channel into a third flow channel and a fourth flow channel located between the third flow channel and the first flow channel, wherein the air outlet end of the fourth flow channel covers the middle position in the length direction of the air outlet cavity, and the air inlet area of ​​the air inlet end of the third flow channel is larger than the air inlet area of ​​the air inlet end of the fourth flow channel.

[0019] According to one embodiment of the present application, the second air guide plate is arranged at the gradually expanding section;

[0020] The horizontal distance between the first air guide plate and the cavity wall at the air inlet end of the first flow channel is L1, and the horizontal distance between the first air guide plate and the cavity wall at the air inlet end of the second flow channel is L2;

[0021] The minimum horizontal distance between the first air guide plate and the cavity wall of the first flow channel is L3, at the air inlet end of the fourth flow channel, the horizontal distance between the first air guide plate and the second air guide plate is L4, and at the air inlet end of the third flow channel, the horizontal distance between the second air guide plate and the cavity wall of the air channel is L5;

[0022] Among them, L1 / (L1+L2)>L3 / (L3+L4+L5).

[0023] According to an embodiment of the present application, the air outlet position of the centrifugal fan is offset from the central axis plane of the base station body, or the air outlet is offset from the central axis plane of the base station body;

[0024] A heater is also provided in the base station body, and the heater is located between the air outlet end of the centrifugal fan and the air inlet end of the air duct, and / or the heater is located between the air outlet end of the gradually expanding section and the air outlet on the base station body.

[0025] According to an embodiment of the present application, the air duct further includes a transition section for connecting the guide section and the gradually expanding section, and an extension direction of the transition section is perpendicular to a radial air outlet surface of the centrifugal fan.

[0026] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0027] 1. The base station for a surface cleaning device provided in the embodiment of the present application optimizes the extension direction of the drainage section of the air duct to achieve the correction of the air flow. Specifically, when the centrifugal fan is started, under the adsorption effect of the centrifugal fan, the external airflow enters the drainage section and the gradual expansion section of the air duct from the air inlet on the base station body in turn, and then is discharged from the air outlet into the air outlet cavity to air dry the cleaning components placed in the air outlet cavity. In this process, the drainage section of the air duct is directly connected to the air outlet position of the centrifugal fan, and the drainage section is tilted and deflected in the direction opposite to the spiral direction of the volute of the centrifugal fan. Therefore, the drainage section can correct the flow direction of the initial airflow flowing out of the centrifugal fan, and the airflow is directed to the middle area centered on the air outlet and then flows into the gradual expansion section, and then discharged from the air outlet, ensuring the uniformity of the air flow distribution of the air outlet and the air outlet cavity, so that each part of the cleaning component can be evenly affected by the wind, thereby improving the drying effect of the cleaning component.

[0028] Moreover, in the embodiment of the present application, the inclined guide section guides the airflow to flow along the optimal path, reduces the flow loss of the airflow, and also reduces the workload of the centrifugal fan. Under the guidance of the guide section, the airflow is prevented from moving randomly in the air duct, and the generation of turbulence is reduced. By reducing turbulence, the energy loss of the airflow can be reduced, thereby also reducing the workload of the centrifugal fan. The reduction of turbulence can also reduce the flow noise of the airflow to a certain extent, and enhance the user experience.

[0029] 2. In an embodiment of the present application, a first air guide plate arranged in the air duct divides the air duct into a first flow channel and a second flow channel to divert the airflow, wherein, based on the extension direction of the first flow channel, it can be seen that the first flow channel and the guide section can produce a synergistic guiding effect, that is, after the guide section initially corrects and guides the airflow, the first flow channel can further guide the airflow to flow in a direction opposite to the spiral direction of the volute of the centrifugal fan, thereby improving the uniformity of the airflow distribution in the air duct.

[0030] Furthermore, the air inlet area of ​​the air inlet end of the first flow channel is larger than the air inlet area of ​​the air inlet end of the second flow channel, which can increase the air flow rate flowing in the direction opposite to the spiral direction of the volute of the centrifugal fan, and effectively improve the situation of insufficient air flow on this side caused by the centrifugal fan.

[0031] 3. In an embodiment of the present application, the second air guide plate further divides the second flow channel into a third flow channel and a fourth flow channel, so that the airflow in the second flow channel can be diverted, wherein the air outlet end of the fourth flow channel covers the middle position in the length direction of the air outlet cavity, that is, a part of the airflow can flow directly in the middle area of ​​the air outlet, and then flow out from the middle area of ​​the air outlet cavity, thereby fully improving the uniformity of the airflow distribution at the air outlet and the air outlet cavity.

[0032] The first air guide plate and the second air guide plate divide the airflow in turn, so that the airflow is divided into three directions of "left, middle and right" in the air duct and flows out from the air outlet, evenly covering the air outlet and the air outlet surface of the air outlet cavity.

[0033] In addition, the flow cross-sectional area between each air flow channel separated by the first air guide plate and the second air guide plate shows a gentle change trend, so that when the air flow flows from the induction section to the gradual expansion section and then flows out from the gradual expansion section to the air outlet, the air flow does not experience a surge or decrease in cross-sectional area. Therefore, the air flow is more stable, avoiding the generation of large flow noise, and improving the user experience.

[0034] 4. In the embodiments of the present application, even if the air outlet position of the centrifugal fan is offset from the central axis plane of the base station body, or the air outlet is offset from the central axis plane of the base station body, since the drainage section of the air duct can correct the airflow, the airflow at the air outlet cavity can still be guaranteed to flow out evenly and the drying effect can be guaranteed. Therefore, the base station for the surface cleaning device provided in the embodiments of the present application can be compatible with the arrangement of more structural parts inside the base station body, without being restricted by the arrangement position of the centrifugal fan, thereby reducing the difficulty of research and development and improving the design flexibility.

[0035] 5. In an embodiment of the present application, the air duct also includes a transition section for connecting the diversion section and the gradually expanding section. The extension direction of the transition section is perpendicular to the radial air outlet surface of the centrifugal fan. The transition section can block the obliquely flowing airflow and fine-tune the flow direction of the airflow to avoid the airflow being excessively diverted to the side area of ​​the air duct and avoid insufficient airflow on the other side of the air duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0037] Figure 1 The overall structure of the base station for the surface cleaning device provided in the embodiment of the present application is shown in FIG. Figure 1 ;

[0038] Figure 2 The overall structure of the base station for the surface cleaning device provided in the embodiment of the present application is shown in FIG. Figure 2 ;

[0039] Figure 3 Schematic diagram of the internal structure of a base station for a surface cleaning device provided in an embodiment of the present application Figure 1 ;

[0040] Figure 4 Schematic diagram of the internal structure of a base station for a surface cleaning device provided in an embodiment of the present application Figure 2 ;

[0041] Figure 5 A schematic cross-sectional view of a base station for a surface cleaning device provided in an embodiment of the present application Figure 1 ;

[0042] Figure 6 A schematic cross-sectional view of a base station for a surface cleaning device provided in an embodiment of the present application Figure 2 ;

[0043] Figure 7 A side view of a base station for a surface cleaning device provided by an embodiment of the present application;

[0044] Figure 8 A schematic diagram of the inclined extension direction of the drainage section of the air duct provided in an embodiment of the present application;

[0045] Fig. 9 A schematic diagram of the structure in which the centrifugal fan and the air duct are relatively longitudinally distributed in an embodiment of the present application.

[0046] in,

[0047] 11. Base station body; 111. Air inlet; 112. Air outlet; 113. Air outlet cavity; 12. Centrifugal fan; 13. Air duct; 131. Drainage section; 1311. Windward side wall; 1312. Leeward side wall; 132. Gradually expanding section; 133. Transition section; 14. First air guide plate; 141. First flow channel; 142. Second flow channel; 15. Second air guide plate; 151. Third flow channel; 152. Fourth flow channel; 16. Heater; 17. Front foot pad; 18. Middle foot pad; 19. Rear foot pad;

[0048] 21, first line segment; 22, second line segment; 23, third line segment; 24, fourth line segment;

[0049] 31. Radial air outlet surface; 32. First projection area; 33. Second projection area; 34. Third projection area. DETAILED DESCRIPTION

[0050] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0051] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0052] In addition, in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0055] like Figures 1 to 7 As shown, an embodiment of the present application provides a base station for a surface cleaning device, including a base station body 11, a centrifugal fan 12 and an air duct 13. The base station body 11 is the main part of the base station. A component accommodating cavity is formed inside the base station body 11. Structural parts such as a control panel, a centrifugal fan 12 and an air duct 13 are usually arranged in the component accommodating cavity. An air inlet 111, an air outlet 112 and an air outlet cavity 113 are provided on the base station body 11. The air duct 13 is connected to the air outlet cavity 113 through the air outlet 112. The centrifugal fan 12 is suitable for guiding the airflow from the air inlet 111 to the air duct 13. When the impeller of the centrifugal fan 12 rotates, a negative pressure zone can be formed between the air inlet 111 and the air duct 13, which will suck air or gas into the central part of the impeller and then throw it out by centrifugal force. In the base station for a surface cleaning device provided in the embodiment of the present application, when drying the cleaning component, the cleaning component can be separated from the main unit and placed separately in the air outlet cavity 113, or the main unit can be directly placed on the base station body 11, and the cleaning component can be placed in the air outlet cavity 113 accordingly. In the flow direction of the airflow, the air duct 13 includes a guide section 131 and a gradually expanding section 132 connected in sequence, and the gradually expanding section 132 is connected to the air outlet 112, wherein the guide section 131 is tilted and deflected in a direction opposite to the spiral direction of the volute of the centrifugal fan 12.

[0056] The spiral direction of the volute of the centrifugal fan 12 usually refers to the direction of rotation of the impeller, which generally has two situations: right-handed and left-handed, which can also be called clockwise and counterclockwise. Figure 1 and Figure 3 The "front, back, left, and right" positions of the entire base station body 11 are shown in FIG. Figure 3 The spiral direction of the volute of the centrifugal fan 12 indicated in the figure is left-handed. When the spiral direction of the volute of the centrifugal fan 12 is left-handed, the airflow usually flows obliquely to the right at the outlet of the centrifugal fan 12. Similarly, when the spiral direction of the volute of the centrifugal fan 12 is right-handed, the airflow usually flows obliquely to the left at the outlet of the centrifugal fan 12.

[0057] It should be noted that, in the embodiment of the present application, the guide section 131 is tilted and deflected in a direction opposite to the spiral direction of the volute of the centrifugal fan 12. The tilted deflection here refers to the guide section 131 relative to the centrifugal fan 12. The design of the guide section 131 causes the flow direction of the airflow to change when passing through the guide section 131, and the direction of this change is opposite to the spiral direction of the volute, which does not include the situation where the guide section 131 extends in the direction of the air outlet pipe of the centrifugal fan 12.

[0058] like Figures 2 to 5 As shown, in the embodiment of the present application, the air inlet 111 is opened at the bottom of the base station body 11 and is located at the rear of the bottom. The top of the base station body 11 is partially sunken to form a cavity, which is the air outlet cavity 113. The cleaning component is placed in the air outlet cavity 113, and the air outlet 112 is opened on the cavity wall of the air outlet cavity 113. Among them, the air inlet 111 can be a shutter structure, which can effectively increase the ventilation effect, improve air flow, and prevent external dust and debris from entering the interior of the base station body 11, protecting the normal operation of the base station. The cleaning component includes a roller brush, a cleaning cloth, etc.

[0059] Furthermore, if Figure 2 , Figures 5 to 7 As shown, at the bottom of the base station body 11, a front foot pad 17, a middle foot pad 18 and a rear foot pad 19 can be arranged in sequence from front to back, and the heights of the front foot pad 17, the middle foot pad 18 and the rear foot pad 19 are gradually increased, so that the air inlet 111 can be ensured to have a sufficient height from the ground to facilitate airflow. In a specific embodiment, the height difference between the rear foot pad 19 and the surface where the bottom air inlet 111 is located is higher than 11 mm, and the height difference between the front foot pad 17 and the rear foot pad 19 is 5 mm.

[0060] like Figure 3 , Figure 4 and Figure 6As shown, the base station for the surface cleaning device provided in the embodiment of the present application, the centrifugal fan 12 and the air duct 13 are arranged on the same horizontal plane. In addition to the above arrangement structure, Fig. 9 As shown, the centrifugal fan 12 can also be arranged higher than the air duct 13, or the air duct 13 can be arranged higher than the centrifugal fan 12, that is, a height difference is formed between the centrifugal fan 12 and the air duct 13, and when the airflow flows from the centrifugal fan 12 to the air duct 13, there is a flow distance in the vertical direction.

[0061] According to the base station for a surface cleaning device provided in an embodiment of the present application, the airflow correction is achieved by optimizing the extension direction of the guide section 131 of the air duct 13. Specifically, when the centrifugal fan 12 is started, under the adsorption effect of the centrifugal fan 12, the external airflow enters the guide section 131 and the gradually expanding section 132 of the air duct 13 in sequence from the air inlet 111 on the base station body 11, and then is discharged from the air outlet 112 into the air outlet cavity 113, so as to air-dry the cleaning components placed in the air outlet cavity 113. During this process, the guide section 131 of the air duct 13 is directly connected to the air outlet position of the centrifugal fan 12, and the guide section 131 is tilted and deflected in the direction opposite to the spiral direction of the volute of the centrifugal fan 12. When the airflow flows out from the air outlet position of the centrifugal fan 12, it is usually close to a parallel flow state. After the airflow contacts the guide section 131, the guide section 131 can correct the direction of the initial airflow flowing out of the centrifugal fan 12, causing the airflow to be reflected, scattered and cross-mixed. Therefore, the airflow can be filled in the guide section 131, and finally the airflow is guided to the middle area centered on the air outlet 112 and then flows into the gradually expanding section 132, and then discharged from the air outlet 112, thereby ensuring the uniformity of the airflow distribution of the air outlet 112 and the air outlet chamber 113, so that each part of the cleaning component can be evenly affected by the wind, thereby improving the drying effect of the cleaning component.

[0062] Moreover, in the embodiment of the present application, the inclined guide section 131 guides the airflow to flow along the optimal path, reduces the flow loss of the airflow, and also reduces the workload of the centrifugal fan 12. Under the guiding effect of the guide section 131, the airflow is prevented from moving randomly in the air duct 13, and the generation of turbulence is reduced. By reducing turbulence, the energy loss of the airflow can be reduced, thereby also reducing the workload of the centrifugal fan 12. The reduction of turbulence can also reduce the flow noise of the airflow to a certain extent, and improve the user experience.

[0063] The guide section 131 is tilted and deflected in a direction opposite to the spiral direction of the volute of the centrifugal fan 12, which can be reflected in the following embodiments:

[0064] Embodiment 1: Figure 8As shown, the angle between the extension direction of the guide section 131 and the spiral direction of the volute of the centrifugal fan 12 is less than or equal to 90°, and the angle between the guide section 131 and the horizontal direction is an obtuse angle, so as to correct the flow direction of the airflow. Figure 8 As shown, the direction of the first line segment 21 is the initial flow direction of the airflow at the outlet position of the centrifugal fan 12, the direction of the second line segment 22 is the horizontal direction, the direction of the third line segment 23 is the vertical direction, and the fourth line segment 24 is located on the left side of the third line segment 23, wherein the angle between the direction of the fourth line segment 24 and the direction of the first line segment 21 is 90°. Based on the figure, it can be seen that the extension area corresponding to the diversion segment 131 is located between the fourth line segment 24 (inclusive) and the third line segment 23 (excluding).

[0065] Embodiment 2: Figure 3 As shown, along the direction perpendicular to the radial outlet surface 31 of the centrifugal fan 12, the guide section 131 forms a first projection area 32 on the radial outlet surface 31, wherein at least part of the first projection area 32 is located on the side opposite to the spiral direction of the volute of the centrifugal fan 12. In the figure, the direction of the first line segment 21 is the initial flow direction of the airflow at the outlet position of the centrifugal fan 12, and the first projection area 32 of the guide section 131 on the radial outlet surface 31 includes two parts, one part of which coincides with the outlet end surface of the centrifugal fan 12, and the other part falls to the left side of the outlet end surface of the centrifugal fan 12, that is, at least part of the first projection area 32 is located on the side opposite to the spiral direction of the volute of the centrifugal fan 12.

[0066] Embodiment 3: Figure 4 As shown, along the direction perpendicular to the radial air outlet surface 31 of the centrifugal fan 12, the windward side wall 1311 of the guide section 131 forms a second projection area 33 on the radial air outlet surface 31, and the leeward side wall 1312 of the guide section 131 forms a third projection area 34 on the radial air outlet surface 31; wherein, the second projection area 33 is located within the range of the air outlet end surface of the centrifugal fan 12; at least a portion of the third projection area 34 is located outside the range of the air outlet end surface of the centrifugal fan 12, and is located on the side opposite to the spiral direction of the volute of the centrifugal fan 12. In the figure, the direction of the first line segment 21 is the initial flow direction of the airflow at the air outlet position of the centrifugal fan 12, and the second projection area 33 of the arc segment between the starting end and the end end of the windward side wall 1311 of the diversion section 131 on the radial air outlet surface 31 completely falls within the range of the air outlet end surface of the centrifugal fan 12, and the third projection area 34 of the arc segment between the starting end and the end end of the leeward side wall 1312 of the diversion section 131 on the radial air outlet surface 31 can be completely located outside the range of the air outlet end surface of the centrifugal fan 12; or there may be a part that coincides with the air outlet end surface, and the other part that is located outside the range of the air outlet end surface.

[0067] The above-mentioned Embodiment 1, Embodiment 2 and Embodiment 3 define the inclination characteristics of the guide section 131 from the perspective of the relative relationship between the guide section 131 and the centrifugal fan 12. In addition, it can also be defined from the perspective of the relative relationship between the guide section 131 and the exhaust surface of the air outlet 112. Specifically, in some embodiments of the present application, the exhaust surface of the air outlet 112 is parallel to the radial air outlet surface 31, and the angle between the extension direction of the guide section 131 and the exhaust surface is less than 90°.

[0068] like Figure 3 and Figure 4 As shown, in some embodiments of the present application, a first air guide plate 14 extending from the guide section 131 to the gradually expanding section 132 is provided in the air duct 13, and the first air guide plate 14 divides the air duct 13 into a first flow channel 141 and a second flow channel 142, and the air inlet area of ​​the air inlet end of the first flow channel 141 is larger than the air inlet area of ​​the air inlet end of the second flow channel 142; wherein, the first flow channel 141 extends obliquely in a direction opposite to the spiral direction of the volute of the centrifugal fan 12, and the second flow channel 142 extends obliquely in a direction same as the spiral direction of the volute of the centrifugal fan 12.

[0069] The first air guide plate 14 also extends obliquely in the direction opposite to the spiral direction of the volute of the centrifugal fan 12. The first air guide plate 14 divides the air duct 13 into a first flow channel 141 and a second flow channel 142 to divert the airflow. Based on the extension direction of the first flow channel 141, it can be seen that the first flow channel 141 and the guide section 131 can produce a synergistic guiding effect, that is, after the guide section 131 initially corrects and guides the airflow, the first flow channel 141 can further guide a part of the airflow to flow in the direction opposite to the spiral direction of the volute of the centrifugal fan 12, and the other part of the airflow is guided by the second flow channel 142 to flow in the same direction as the spiral direction of the volute of the centrifugal fan 12. The airflow flows in the air duct 13 in a "left and right" state, thereby improving the uniformity of the airflow distribution in the air duct 13.

[0070] Furthermore, the air inlet area of ​​the air inlet end of the first flow channel 141 is larger than the air inlet area of ​​the air inlet end of the second flow channel 142, which can increase the air flow rate flowing in the direction opposite to the spiral direction of the volute of the centrifugal fan 12, and effectively improve the situation of insufficient air flow on this side caused by the centrifugal fan 12.

[0071] like Figure 3 and Figure 4As shown, in some embodiments of the present application, a second air guide plate 15 is provided in the second flow channel 142 and is arranged at an interval with the first air guide plate 14; the second air guide plate 15 divides the second flow channel 142 into a third flow channel 151, and a fourth flow channel 152 located between the third flow channel 151 and the first flow channel 141, wherein the air outlet end of the fourth flow channel 152 covers the middle position in the length direction of the air outlet cavity 113, and the air inlet area of ​​the air inlet end of the third flow channel 151 is larger than the air inlet area of ​​the air inlet end of the fourth flow channel 152.

[0072] The second air guide plate 15 further divides the second flow channel 142 into a third flow channel 151 and a fourth flow channel 152, so that the airflow in the second flow channel 142 can be diverted for a second time, wherein the air outlet end of the fourth flow channel 152 covers the middle position of the length direction of the air outlet cavity 113, that is, a part of the airflow can flow directly into the middle area of ​​the air outlet 112, and then flow out from the middle area of ​​the air outlet cavity 113, thereby fully improving the uniformity of the airflow distribution at the air outlet 112 and the air outlet cavity 113.

[0073] The first air guide plate 14 and the second air guide plate 15 sequentially divide the airflow so that the airflow is divided into three directions of “left, middle, and right” in the air duct 13 and flows out from the air outlet 112 , evenly covering the air outlet surfaces of the air outlet 112 and the air outlet cavity 113 .

[0074] In addition, the flow cross-sectional area between each air flow channel separated by the first air guide plate 14 and the second air guide plate 15 changes gently, so that when the air flow flows from the guide section 131 to the gradually expanding section 132 and then flows out from the gradually expanding section 132 to the air outlet 112, the air flow does not experience a surge or a sudden decrease in cross-sectional area. Therefore, the air flow is more stable, avoiding large flow noise generated by the air flow, and improving the user experience.

[0075] Further, regarding the structural design parameters of the first air guide plate 14 and the second air guide plate 15 in the air duct 13, reference may be made to the following embodiments:

[0076] like Figure 4 As shown, in some embodiments of the present application, the second air guide plate 15 is arranged in the gradually expanding section 132; the horizontal distance between the first air guide plate 14 and the cavity wall of the air inlet end of the first flow channel 141 is L1, and the horizontal distance between the first air guide plate 14 and the cavity wall of the air inlet end of the second flow channel 142 is L2; ​​the minimum horizontal distance between the first air guide plate 14 and the cavity wall of the first flow channel 141 is L3, at the air inlet end of the fourth flow channel 152, the horizontal distance between the first air guide plate 14 and the second air guide plate 15 is L4, and at the air inlet end of the third flow channel 151, the horizontal distance between the second air guide plate 15 and the cavity wall of the air duct 13 is L5; wherein, L1 / (L1+L2)>L3 / (L3+L4+L5).

[0077] Furthermore, L4<L5, L2=0.7L1, L3=0.4(L4+L5), L4=0.35L5.

[0078] The above defines the specific structural parameters between the first air guide plate 14, the second air guide plate 15 and the air duct 13 to ensure that the airflow flows smoothly and is evenly distributed in the air duct 13. In addition, through parametric design, we can quickly compare the structural arrangements of the first air guide plate 14 and the second air guide plate 15, and the calculation results are intuitive and visual, which greatly improves the design efficiency and saves time.

[0079] Different from the structure in the prior art in which the centrifugal fan 12 is usually arranged in the center of the base station body 11, in some embodiments of the present application, the air outlet position of the centrifugal fan 12 is offset from the central axis of the base station body 11, or the air outlet 112 is offset from the central axis of the base station body 11. Specifically, even if the air outlet position of the centrifugal fan 12 is offset from the central axis of the base station body 11, or the air outlet 112 is offset from the central axis of the base station body 11, since the guide section 131 of the air duct 13 can correct the airflow, it is still possible to ensure that the airflow at the air outlet cavity 113 flows out evenly and the drying effect is ensured. Therefore, the base station for the surface cleaning device provided in the embodiment of the present application can be compatible with the arrangement of more structural parts inside the base station body 11, without being limited by the arrangement position of the centrifugal fan 12, which reduces the difficulty of research and development and improves the design flexibility.

[0080] like Figure 3 and Figure 4 As shown, in some embodiments of the present application, a heater 16 is further provided in the base station body 11, and the heater 16 is located between the air outlet end of the centrifugal fan 12 and the air inlet end of the air duct 13, and / or, the heater 16 is located between the exhaust end of the gradually expanding section 132 and the air outlet 112 on the base station body 11.

[0081] The heater 16 can heat the airflow so that the airflow has a drying effect. Specifically, when the heater 16 is located between the air outlet of the centrifugal fan 12 and the air inlet of the air duct 13, the heater 16 can directly heat the airflow blown out by the centrifugal fan 12, and then the heated airflow will enter the air duct 13, ensuring that the airflow entering the air duct 13 has been preheated, and the preheated drying airflow flows into the air outlet cavity 113 along the air duct 13 to dry the cleaning components, thereby improving the drying efficiency and drying effect of the cleaning components. In addition, the hot air flows in the air duct 13, which also has a drying effect on the internal environment of the air duct 13, preventing bacteria from growing inside the air duct 13 due to humidity, and the hot air also has a certain sterilization effect on the cleaning components. When the heater 16 is located between the exhaust end of the gradually expanding section 132 and the air outlet 112 on the base station body 11, the heater 16 can heat the air flow before it passes through the air duct 13 and is about to be discharged from the air outlet 112 of the base station body 11. This ensures that the air flow discharged from the air outlet 112 of the base station body 11 has a sufficient temperature, thereby improving the drying effect and drying efficiency of the cleaning components.

[0082] Furthermore, in order to better ensure the drying effect, the heater 16 can be respectively arranged between the air outlet end of the centrifugal fan 12 and the air inlet end of the air duct 13, and between the exhaust end of the gradually expanding section 132 and the air outlet 112 on the base station body 11, so that the airflow is heated secondary, the drying efficiency is higher, and the drying effect is stronger.

[0083] like Figure 3 and Figure 4 As shown, in some embodiments of the present application, the air duct 13 further includes a transition section 133 for connecting the flow guide section 131 and the gradually expanding section 132, and the extension direction of the transition section 133 is perpendicular to the radial air outlet surface 31 of the centrifugal fan 12. A flow-blocking side wall may be provided on the transition section 133, the flow-blocking side wall is located in the first flow channel 141, and the flow-blocking side wall forms a protrusion toward the direction of the first air guide plate 14.

[0084] Based on the above structure, the transition section 133 can block the obliquely flowing airflow and fine-tune the direction of the airflow to prevent the airflow from being excessively diverted to the side area of ​​the first flow channel 141 and avoid insufficient airflow on the other side of the first flow channel 141.

[0085] In some embodiments of the present application, spoiler ribs may be further provided between the exhaust end of the diverging section 132 and the air outlet 112 of the base station body 11. After passing through the spoiler ribs, the airflow will be deflected upward and discharged more evenly from the air outlet 112, thereby achieving uniform drying of the cleaning components.

[0086] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0087] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A base station for a surface cleaning device, comprising a base station body, a centrifugal fan and an air duct, wherein the base station body is provided with an air inlet, an air outlet and an air outlet cavity, the air duct is connected with the air outlet cavity through the air outlet, the centrifugal fan is suitable for guiding airflow from the air inlet to the air duct, and is characterized in that: Along the flow direction of the airflow, the air duct includes a guide section and a gradually expanding section connected in sequence, the gradually expanding section is connected to the air outlet, wherein the guide section is tilted and deflected in a direction opposite to the spiral direction of the volute of the centrifugal fan.

2. The base station for a surface cleaning device according to claim 1, characterized in that: The angle between the extension direction of the guide section and the spiral direction of the volute of the centrifugal fan is less than or equal to 90°, and the angle between the extension direction of the guide section and the horizontal direction is an obtuse angle, so as to correct the flow direction of the airflow.

3. The base station for a surface cleaning device according to claim 1, characterized in that: Along a direction perpendicular to the radial air outlet surface of the centrifugal fan, the guide section forms a first projection area on the radial air outlet surface, wherein at least a portion of the first projection area is located on the side opposite to the spiral direction of the volute of the centrifugal fan.

4. The base station for a surface cleaning device according to claim 1, characterized in that: Along a direction perpendicular to the radial air outlet surface of the centrifugal fan, the windward side wall of the guide section forms a second projection area on the radial air outlet surface, and the leeward side wall of the guide section forms a third projection area on the radial air outlet surface; Wherein, the second projection area is located within the range of the air outlet end surface of the centrifugal fan; At least a portion of the third projection area is located outside the range of the air outlet end surface of the centrifugal fan and is located on the side opposite to the spiral direction of the volute of the centrifugal fan.

5. The base station for a surface cleaning device according to claim 3, characterized in that: The air outlet surface of the air outlet is parallel to the radial air outlet surface, and the angle between the extension direction of the guide section and the air outlet surface is less than 90°.

6. The base station for a surface cleaning device according to claim 1, characterized in that: A first air guide plate extending from the guide section to the gradually expanding section is provided in the air duct, the first air guide plate divides the air duct into a first flow channel and a second flow channel, and an air inlet area of ​​an air inlet end of the first flow channel is larger than an air inlet area of ​​an air inlet end of the second flow channel; The first flow channel extends obliquely in a direction opposite to the spiral direction of the volute of the centrifugal fan, and the second flow channel extends obliquely in a direction identical to the spiral direction of the volute of the centrifugal fan.

7. The base station for a surface cleaning device according to claim 6, characterized in that: A second air guide plate spaced apart from the first air guide plate is provided in the second flow channel; The second air guide plate divides the second flow channel into a third flow channel and a fourth flow channel located between the third flow channel and the first flow channel, wherein the air outlet end of the fourth flow channel covers the middle position in the length direction of the air outlet cavity, and the air inlet area of ​​the air inlet end of the third flow channel is larger than the air inlet area of ​​the air inlet end of the fourth flow channel.

8. The base station for a surface cleaning device according to claim 7, characterized in that: The second air guide plate is arranged at the gradually expanding section; The horizontal distance between the first air guide plate and the cavity wall at the air inlet end of the first flow channel is L1, and the horizontal distance between the first air guide plate and the cavity wall at the air inlet end of the second flow channel is L2; The minimum horizontal distance between the first air guide plate and the cavity wall of the first flow channel is L3, at the air inlet end of the fourth flow channel, the horizontal distance between the first air guide plate and the second air guide plate is L4, and at the air inlet end of the third flow channel, the horizontal distance between the second air guide plate and the cavity wall of the air channel is L5; Among them, L1 / (L1+L2)>L3 / (L3+L4+L5).

9. The base station for a surface cleaning device according to any one of claims 1 to 8, characterized in that: The air outlet position of the centrifugal fan is offset from the central axis plane of the base station body, or the air outlet is offset from the central axis plane of the base station body; A heater is also provided in the base station body, and the heater is located between the air outlet end of the centrifugal fan and the air inlet end of the air duct, and / or the heater is located between the air outlet end of the gradually expanding section and the air outlet on the base station body.

10. The base station for a surface cleaning device according to any one of claims 1 to 8, characterized in that: The air duct also includes a transition section for connecting the flow guide section and the gradually expanding section, and an extending direction of the transition section is perpendicular to a radial air outlet surface of the centrifugal fan.

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