Filter screen structure, dust box assembly and cleaning equipment

Abstract

The embodiment of the utility model provides a filter screen structure, a dust box assembly and cleaning equipment. In the filter screen structure, in the second direction, the extension length of the first filter screen installation area of the filter screen support is larger than that of the second filter screen installation area, and the filter screen is in the shape matched with the filter screen installation area. Therefore, the mounting area, used for mounting the filter screen, of the filter screen support is divided into two areas, the length of the first mounting area of the filter screen can be conveniently increased in the second direction, the length of the first mounting area of the filter screen in the second direction is longer than that of the second mounting area of the filter screen, the capacity expansion purpose can be achieved, and therefore the overall area of the filter screen can be maximized; the overall overflowing area of the filter screen can be increased, and therefore the overflowing air volume can be increased, and the cleaning performance of the cleaning equipment is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cleaning, in particular to a filter screen structure, a dust box assembly and a cleaning device. BACKGROUND

[0002] In modern life, cleaning devices are becoming more and more popular, bringing convenience to family life. For example, cleaning devices such as sweeping robots, mopping robots and sweeping and mopping integrated robots are widely used. The dust box is one of the main components of the cleaning device, and its main function is to filter dust and garbage by using a filter screen, so that dust is accumulated in the dust box. However, in the related art, the filter screen has a large blocking effect on the airflow passing through the dust box, resulting in a small overall air volume, thereby reducing the cleaning performance of the cleaning device. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the main purpose of the embodiments of the present application is to provide a filter screen structure, a dust box assembly and a cleaning device capable of improving the flow wind volume.

[0004] To achieve the above-mentioned purpose, the technical scheme of the embodiments of the present application is as follows:

[0005] The first aspect of the embodiments of the present application provides a filter screen structure, comprising:

[0006] A filter screen support, the filter screen support has a filter screen mounting area, the filter screen mounting area at least includes a filter screen first mounting area and a filter screen second mounting area, the filter screen first mounting area is located on one side of the filter screen second mounting area along a first direction; along a second direction, the extension length of the filter screen first mounting area is greater than the extension length of the filter screen second mounting area; wherein the first direction and the second direction are perpendicular;

[0007] A filter screen; the filter screen is arranged on the filter screen support and has a shape matched with the filter screen mounting area.

[0008] In an embodiment, the filter screen at least includes a first filter screen and a second filter screen; the first filter screen is arranged in the filter screen first mounting area; the second filter screen is arranged in the filter screen second mounting area; along the second direction, the length of the first filter screen is greater than the length of the second filter screen.

[0009] In an embodiment, the filter screen mounting area further at least includes a filter screen third mounting area.

[0010] In an embodiment, the filter screen includes a third filter screen, and the third filter screen is arranged in the filter screen third mounting area.

[0011] In an embodiment, the filter screen first mounting area and the filter screen second mounting area are located in the same plane.

[0012] In one embodiment, along at least one side of the second direction, the first mounting area of the filter screen comprises a first side wall, and the second mounting area of the filter screen comprises a second side wall;

[0013] Along the second direction, the first side wall protrudes relative to the second side wall to jointly form a transition step.

[0014] In one embodiment, the filter screen support further comprises a connecting wall, opposite ends of the connecting wall being connected to the first side wall and the second side wall respectively to jointly form a reinforcing cavity with the first side wall and the second side wall.

[0015] In one embodiment, the connecting wall is an arc-shaped wall; and / or,

[0016] Along a third direction, at least one side of the reinforcing cavity is closed; wherein the third direction is perpendicular to the first direction and the second direction respectively.

[0017] The second aspect of the embodiments of the present application provides a dust box assembly, comprising:

[0018] A box body, the box body having a first air inlet, a first air outlet and a containing cavity, the first air inlet and the first air outlet being in communication with the containing cavity respectively to form an airflow flow path sequentially flowing through the first air inlet, the containing cavity and the first air outlet;

[0019] The filter screen structure of any one of the above-mentioned embodiments is arranged in the containing cavity and located on the airflow flow path.

[0020] In one embodiment, the filter screen structure is arranged in the containing cavity to separate a dust collecting cavity located on a side of the filter screen structure close to the first air inlet; and / or,

[0021] The first air outlet is located on a side of the second mounting area of the filter screen away from the first mounting area of the filter screen, and the first air outlet is in communication with the first mounting area of the filter screen and the second mounting area of the filter screen away from the first air inlet respectively.

[0022] In one embodiment, the containing cavity has a first containing area and a second containing area in communication with each other; the first mounting area of the filter screen is located in the first containing area, and the second mounting area of the filter screen is located in the second containing area;

[0023] Along the second direction, the extension length of the first containing area is greater than the extension length of the second containing area.

[0024] The third aspect of the embodiments of the present application provides a cleaning device, comprising:

[0025] The dust box assembly according to any one of the preceding embodiments.

[0026] The fan support is arranged at one side of the box body having the first air outlet, and has a second air inlet and a second air outlet, wherein the second air inlet is in communication with the first air outlet.

[0027] In one embodiment, the side wall of at least one side of the second air inlet is an expansion wall body, which is recessed in a direction away from the second air inlet to form an expansion area.

[0028] In one embodiment, the expansion wall body is one of a curved surface and a bent surface; and / or

[0029] The number of side wall surfaces of the second air inlet is greater than or equal to 4; and / or,

[0030] In a projection plane parallel to the first air outlet, the projection of the second air inlet is located within the projection range of the first air outlet.

[0031] In one embodiment, the fan support has a first air duct and a second air duct, one side of the first air duct is open to form the second air inlet, and one side of the second air duct is open to form the second air outlet.

[0032] The first air duct extends in a fourth direction, and the second air duct extends in a fifth direction, wherein the fourth direction and the fifth direction form a first included angle.

[0033] The fan support includes a flow guide surface at the first included angle to guide at least part of the airflow flowing along the first air duct to flow into the second air duct.

[0034] In one embodiment, the flow guide surface is one of a flow guide inclined surface and a flow guide curved surface; and / or,

[0035] The angle of the first included angle is less than or equal to 90°.

[0036] In one embodiment, the fan support further includes a side wall surface opposite to the flow guide surface, and the flow guide surface and the side wall surface are spaced to form a third air duct, wherein opposite ends of the third air duct are in communication with the first air duct and the second air duct, respectively.

[0037] In one embodiment, the third air duct forms a second included angle with the first air duct, and forms a third included angle with the second air duct, wherein the angles of the second included angle and the third included angle are both greater than the angle of the first included angle; and / or,

[0038] The fan support includes a support base and a support upper shell, the support base has the flow guide surface, the support upper shell has the side wall surface, and the support base is detachably arranged on the support upper shell to jointly form the third air duct.

[0039] The embodiment of the present application provides a filter screen structure, a dust box assembly and a cleaning device. The filter screen structure comprises a filter screen support and a filter screen. The filter screen support comprises a filter screen mounting area. The filter screen is arranged on the filter screen support and has a shape matched with the filter screen mounting area.

[0040] The filter screen mounting area is a specified division area (geometric concept area) or a physically divided area (for example, a partition).

[0041] In addition, the filter screen mounting area comprises at least a filter screen first mounting area and a filter screen second mounting area, that is, the filter screen support comprises a plurality of mounting areas. The filter screen first mounting area is located on one side of the filter screen second mounting area along a first direction. Along a second direction, the extension length of the filter screen first mounting area is greater than that of the filter screen second mounting area.

[0042] Therefore, by dividing the mounting area of the filter screen support into at least two areas for mounting the filter screen, the length of the filter screen first mounting area along the second direction can be easily extended, so that the length of the filter screen first mounting area along the second direction is greater than that of the filter screen second mounting area, which can achieve the purpose of expansion, thereby maximizing the overall area of the filter screen, improving the overall flow area of the filter screen, and further improving the flow wind volume, so that the cleaning performance of the cleaning device is improved.

[0043] In addition, preferably, the filter screen comprises at least a first filter screen and a second filter screen; the first filter screen is arranged in the filter screen first mounting area, and the second filter screen is arranged in the filter screen second mounting area.

[0044] As above, the division of the first and second filter screens and the like can refer to different areas (geometric concept areas) or physically divided areas (for example, different blocks) of the same filter screen.

[0045] Since the filter screen first mounting area and the filter screen second mounting area have different sizes along the second direction, by arranging two sub-filter screens (that is, the first filter screen and the second filter screen) with different lengths, the filter screen can be matched with the filter screen first mounting area and the filter screen second mounting area without using a single special-shaped filter screen, and the processing and manufacturing of the filter screen can be facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 FIG. 1 is a schematic view of the cooperation relationship between a dust box assembly and a fan support according to an embodiment of the present application, and FIG. 1 shows a fan;

[0047] Figure 2 FIG. 2 is a structural schematic view of a filter screen structure in the dust box assembly shown in FIG. 1; and Figure 1 FIG. 3 is a structural schematic view of another filter screen structure in the dust box assembly shown in FIG. 1.

[0048] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0049] Figure 4 for Figure 2 Exploded view of the middle filter structure;

[0050] Figure 5 for Figure 1 Schematic diagram of the structure of the stroke machine bracket;

[0051] Figure 6 for Figure 5 Exploded view of the stroke machine bracket;

[0052] Figure 7 for Figure 5 Cross-sectional view of the stroke fan bracket.

[0053] Description of Reference Numerals

[0054] 10. Dust box assembly; 11. Box body; 11a. First air outlet; 11b. Accommodation chamber; 11ba. First accommodating area; 11bb. Second accommodating area; 12. Filter structure; 121. Filter bracket; 121a. Reinforcement chamber; 1211. First filter installation area; 1212. First side wall; 1213. Second filter installation area; 1214. Second side wall; 1215. Connecting wall; 122. First filter; 123. Second filter; 20. Fan bracket; 21. Expansion wall; 22. Bracket base; 23. Bracket upper shell; 20a. Second air inlet; 20b. Second air outlet; 20c. Expansion area; 20d. First air duct; 20e. Second air duct; 20f. Guide surface; 20g. Side wall surface; 20h. Third air duct; 30. Fan. DETAILED DESCRIPTION

[0055] In this application, the orientation or position relationship between the "first direction" and the "second direction" is based on the attached Figure 2 The directions or positional relationships shown in the figure are based on the directions or positional relationships of the fourth direction and the fifth direction. Figure 7 It should be understood that these directional terms are only used to facilitate the description of this application and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application.

[0056] An embodiment of the present application provides a filter structure 12, see Figure 2 and Figure 4 The filter structure 12 includes a filter support 121 and a filter.

[0057] The filter screen support 121 has a filter screen mounting area, which at least includes a filter screen first mounting area 1211 and a filter screen second mounting area 1213. The filter screen first mounting area 1211 is located at one side of the filter screen second mounting area 1213 along a first direction. Along a second direction, the extension length of the filter screen first mounting area 1211 is greater than that of the filter screen second mounting area 1213. The first direction and the second direction are perpendicular.

[0058] The filter screen is arranged on the filter screen support 121 and has a shape matched with the filter screen mounting area.

[0059] Another embodiment of the present application provides a dust box assembly 10, please refer to Figure 1 The dust box assembly 10 includes a box body 11 and the filter screen structure 12 of any embodiment of the present application.

[0060] The box body 11 has a first air inlet, a first air outlet 11a and a containing cavity 11b. The first air inlet and the first air outlet 11a are respectively communicated with the containing cavity 11b to form an air flow path flowing through the first air inlet, the containing cavity 11b and the first air outlet 11a in sequence.

[0061] The filter screen structure 12 is arranged in the containing cavity 11b and located on the air flow path.

[0062] Still another embodiment of the present application provides a cleaning device, please refer to Figure 1 The cleaning device includes a fan support 20 and the dust box assembly 10 of any embodiment of the present application.

[0063] The fan support 20 is arranged at one side of the box body 11 having the first air outlet 11a. The fan support 20 has a second air inlet 20a and a second air outlet 20b. The second air inlet 20a is communicated with the first air outlet 11a.

[0064] Specifically, the filter screen structure 12 and the dust box assembly 10 of the embodiments of the present application can be applied to any type of device. For ease of description, the embodiments of the present application take the filter screen structure 12 used in the dust box assembly 10 of the cleaning device as an example for description.

[0065] The cleaning device of the embodiments of the present application can be any type of cleaning device, such as a cleaning robot, a dust collector, etc. For ease of description, the embodiments of the present application take the cleaning device as a cleaning robot for description.

[0066] Specifically, the fan support 20 of the cleaning device is used to dock the dust box assembly 10 and the fan 30 of the cleaning device. The second air inlet 20a of the fan support 20 is used to communicate with the first air outlet 11a of the dust box assembly 10, and the second air outlet 20b is used to dock with the fan 30 of the cleaning device.

[0067] The filter screen structure 12 is arranged in the accommodating cavity 11b of the box body 11 to filter dust and garbage sucked into the box body 11 by the air flow, so as to reduce the risk of the dust and garbage flowing into the fan 30 with the air flow.

[0068] When the fan 30 is turned on, the air flow flows along the air flow flow path, flows into the accommodating cavity 11b from the first air inlet, and the garbage and dust in the air flow can be filtered by the filter screen structure 12 when flowing through the filter screen structure 12 in the accommodating cavity 11b, and will not continue to flow with the air flow. After the air flow separated from the dust and garbage passes through the filter screen structure 12, it will continue to flow along the air flow flow path to the first air outlet 11a, and then flow through the second air inlet 20a and the second air outlet 20b to be discharged by the fan 30 of the cleaning device.

[0069] Specifically, the shape of at least a part of the filter screen is adapted to the shape of the filter screen mounting area, so as to facilitate the mounting of the filter screen to the filter screen mounting area.

[0070] For example, the filter screen at least includes a first filter screen 122 and a second filter screen 123. The first filter screen 122 is arranged in the filter screen first mounting area 1211. The second filter screen 123 is arranged in the filter screen second mounting area 1213; along the second direction, the length of the first filter screen 122 is greater than the length of the second filter screen 123.

[0071] Wherein, the division of the first filter screen 122, the second filter screen 123, etc. can refer to different regions (geometric concept regions) of the same piece of filter screen or physically divided regions (such as: different pieces). Thus, to correspond to the filter screen first mounting area 1211 and the filter screen second mounting area 1213 respectively.

[0072] That is, the filter screen structure 12 includes a filter screen support 121 and at least two pieces of sub-filter screens, i.e. the first filter screen 122 and the second filter screen 123. The first filter screen 122 and the second filter screen 123 are both mounted in the mounting area of the filter screen support 121.

[0073] The specific structural form of the first filter screen 122 and the second filter screen 123 is not limited. Since the filter screen structure 12 is formed by splicing two pieces of sub-filter screens, even if the filter screen support 121 is a special-shaped structure, the first filter screen 122 and the second filter screen 123 can also adopt a conventional structural form, such as both the first filter screen 122 and the second filter screen 123 being rectangular filter screens. Of course, according to actual needs, the first filter screen 122 and the second filter screen 123 can also adopt irregular special-shaped structural forms.

[0074] In some embodiments, the filter screen mounting area further at least includes a filter screen third mounting area. That is, in addition to the filter screen first mounting area 1211 and the filter screen second mounting area 1213, the filter screen support 121 can also include other regions for mounting filter screens.

[0075] In some embodiments, the filter screen includes a third filter screen, and the third filter screen is arranged in the third mounting area of the filter screen. That is, the filter screen can further include a third filter screen corresponding to the third mounting area of the filter screen.

[0076] For the filter screen including at least the first filter screen 122 and the second filter screen 123, the first mounting area 1211 and the second mounting area 1213 of the filter screen refer to specific structures of the filter screen support 121 for mounting the first filter screen 122 and the second filter screen 123, respectively. In fact, the first mounting area 1211 of the filter screen includes a first frame body and a first filter screen mounting cavity formed by the first frame body, and the second mounting area 1213 of the filter screen includes a second frame body and a second filter screen mounting cavity formed by the second frame body.

[0077] The mounting area of the filter screen support 121 adopts a special-shaped structure, that is, the mounting area of the filter screen support 121 is not in a conventional structure (such as a rectangular form). Specifically, the filter screen support 121 includes two mounting areas, i.e., the first mounting area 1211 and the second mounting area 1213 of the filter screen, wherein the length of the first mounting area 1211 in the second direction is greater than the length of the second mounting area 1213, so that the local expansion of the mounting area of the first mounting area 1211 can be realized, and the mounting area of the filter screen structure 12 is increased.

[0078] It should be noted that the filter screen structure 12 of the embodiment of the present application is not an overall expansion of the first mounting area 1211 and the second mounting area 1213 of the filter screen, which can increase the mounting area of the filter screen while considering the overall size of the filter screen structure 12.

[0079] In fact, the filter screen support 121 is a single filter screen frame, and two filter papers are placed in the filter screen support 121. The first direction and the second direction are the length direction and the width direction of the plate surface of the filter screen support 121, respectively, and are not the thickness direction of the filter screen support 121. For example, the first direction can be the length direction of the filter screen support 121, and the second direction can be the width direction of the filter screen support 121. For another example, the second direction can be the length direction of the filter screen support 121, and the first direction can be the width direction of the filter screen support 121.

[0080] Of course, according to the actual situation, the first mounting area 1211 and the second mounting area 1213 of the filter screen can be located in the same plane, that is, the first filter screen 122 and the second filter screen 123 are spliced to form an integral filter screen in the same plane. Of course, in other embodiments, the first mounting area 1211 and the second mounting area 1213 of the filter screen can also be misaligned.

[0081] The filter screen first mounting area 1211 is located on one side of the filter screen second mounting area 1213 along the first direction. According to actual conditions, the mounting cavities of the two can be in communication with each other, or can be separated by a separation strip.

[0082] In summary, in the filter screen structure 12 of the embodiment of the present application, by dividing the mounting area for mounting the filter screen by the filter screen support 121 into two areas, the length of the filter screen first mounting area 1211 along the second direction can be easily extended, so that the length of the filter screen first mounting area 1211 along the second direction is longer than that of the filter screen second mounting area 1213, which can achieve the purpose of expansion, so as to maximize the overall area of the filter screen, improve the overall flow area of the filter screen, and further improve the flow air volume, so that the cleaning performance of the cleaning equipment is improved.

[0083] For the filter screen including at least the first filter screen 122 and the second filter screen 123, since the sizes of the filter screen first mounting area 1211 and the filter screen second mounting area 1213 along the second direction are different, by setting two sub-filters (i.e., the first filter screen 122 and the second filter screen 123) with different lengths, the filter screen can be matched with the filter screen first mounting area 1211 and the filter screen second mounting area 1213 without using a single special-shaped filter screen, and the processing and manufacturing of the filter screen can be facilitated.

[0084] In an embodiment, as shown in Figure 2 and Figure 3 , along at least one side of the second direction, the filter screen first mounting area 1211 includes a first side wall 1212, and the filter screen second mounting area 1213 includes a second side wall 1214.

[0085] Along the second direction, the first side wall 1212 protrudes relative to the second side wall 1214 to jointly form a transition step. Thus, the shape of the filter screen support 121 is also special-shaped, which can reduce the size of the shape of the filter screen support 121 as much as possible while meeting the requirements of mounting the first filter screen 122 and the second filter screen 123.

[0086] Specifically, the side wall of the filter screen first mounting area 1211 can protrude relative to the side wall of the filter screen second mounting area 1213 along only one side of the second direction. Along the other side of the second direction, the side wall of the filter screen first mounting area 1211 is flush with the side wall of the filter screen second mounting area 1213 along the first direction.

[0087] Of course, in other embodiments, the side wall of the filter screen first mounting area 1211 can protrude relative to the side wall of the filter screen second mounting area 1213 along both sides of the second direction. Thus, the purpose of expanding the filter screen first mounting area 1211 can be achieved.

[0088] In an embodiment, as shown in Figure 2 andFigure 3 The filter screen support 121 further comprises a connecting wall 1215, opposite ends of the connecting wall 1215 being connected to the first side wall 1212 and the second side wall 1214 respectively, so as to form a reinforcing cavity 121a together with the first side wall 1212 and the second side wall 1214. In this way, by arranging the connecting wall 1215, the structural strength of the filter screen support 121 can be improved.

[0089] It should be noted that the connecting wall 1215, the first side wall 1212 and the second side wall 1214 can be an integral structure or a split connection structure.

[0090] The specific shape of the connecting wall 1215 is not limited. For example, the connecting wall 1215 is an arc-shaped wall. In fact, the first side wall 1212 and the second side wall 1214 are smoothly connected by the arc-shaped wall. In this way, the mutation point of the outer periphery of the filter screen support 121 can be reduced, and the appearance of the filter screen support 121 is more smooth.

[0091] Of course, in other embodiments, the connecting wall 1215 can also be a planar wall.

[0092] In an embodiment, referring to Figures 2 to 4 In the third direction, at least one side of the reinforcing cavity 121a is closed; the third direction is perpendicular to the first direction and the second direction. In this way, the structural strength of the reinforcing cavity 121a can be further improved, and the structural stability of the filter screen support 121 is better.

[0093] In fact, the third direction is the thickness direction of the filter screen structure 12. According to the actual situation, the reinforcing cavity 121a can be closed on one side in the third direction, or the reinforcing cavity 121a can be closed on opposite sides in the third direction.

[0094] The lateral closure of the reinforcing cavity 121a in the third direction is achieved by extending the bottom surface of the filter screen support 121, so as to achieve the lateral closure of the reinforcing cavity 121a in the third direction.

[0095] In an embodiment, the filter screen structure 12 is arranged in the containing cavity 11b to divide a dust collecting cavity located on one side of the filter screen structure 12 close to the first air inlet. That is, the dust collecting cavity is a part of the containing cavity 11b, which is divided by the filter screen structure 12 in the containing cavity 11b, so that a part of the containing cavity 11b is used for dust collection, and another part is used for communication with the fan support 20.

[0096] In an embodiment, the first air outlet 11a is located at the side of the second filter mounting area 1213 away from the first filter mounting area 1211, and the first air outlet 11a is in communication with the side of the first filter mounting area 1211 and the second filter mounting area 1213 away from the first air inlet respectively. In this way, the fan bracket 20 and the fan 30 can be arranged at the side of the dust box assembly 10, and the fan 30 can be arranged conveniently.

[0097] For the filter screen including the first filter screen 122 and the second filter screen 123, the first air outlet 11a is located at the side of the second filter screen 123 away from the first filter screen 122. In fact, the first air inlet of the box body 11 and the dust collection cavity are located at the bottom side of the first filter screen 122 and the second filter screen 123, and the first air outlet 11a of the box body 11 is located at the side of the second filter screen 123 in the circumferential direction, instead of being located at the top side of the first filter screen 122 and the second filter screen 123. In this way, when the fan bracket 20 and the fan 30 are installed at the top side of the dust box assembly 10, the thickness of the combination of the three in the top-bottom direction can be reduced.

[0098] It should be noted that the first air outlet 11a is in communication with the side of the first filter mounting area 1211 away from the first air inlet, and is also in communication with the side of the second filter mounting area 1213 away from the first air inlet, so as to ensure the ventilation effect.

[0099] In an embodiment, referring to Figure 1 , the accommodation cavity 11b has a first accommodation area 11ba and a second accommodation area 11bb in communication with each other; the first filter mounting area 1211 is located in the first accommodation area 11ba, and the second filter mounting area 1213 is located in the second accommodation area 11bb.

[0100] In the second direction, the extension length of the first accommodation area 11ba is greater than the extension length of the second accommodation area 11bb.

[0101] That is, the accommodation cavity 11b of the box body 11 also matches the shape of the filter screen structure 12, so as to reduce the overall size of the box body 11 as much as possible, while meeting the installation requirements of the filter screen structure 12.

[0102] In fact, in order to meet the extension requirements of the first filter screen 122 in the second direction, the box body 11 also adopts a special-shaped structure, instead of a conventional structure (such as a rectangle), so as to facilitate better installation of the filter screen structure 12.

[0103] In an embodiment, referring to Figure 5The side wall of at least one side of the second air inlet 20a is an expansion wall 21. The expansion wall 21 is recessed towards a direction away from the second air inlet 20a to form an expansion area 20c. In this way, the opening size of the air inlet of the fan support 20 can be increased, and the air inlet amount can be greatly increased, so as to increase the air amount of the whole cleaning equipment, and further improve the cleaning performance.

[0104] Specifically, the second air inlet 20a can be that only the side wall of one side in the circumferential direction is the expansion wall 21, that is, the expansion area 20c is formed in a relatively recessed manner to expand the area of the second air inlet 20a. Of course, according to actual conditions, the second air inlet 20a can also be that the side walls of multiple sides or all sides in the circumferential direction are expansion walls 21.

[0105] It can be understood that the expansion area 20c is a part of the second air inlet 20a, which is recessed by the expansion wall 21 to form expansion.

[0106] It should be noted that the specific shape of the expansion wall 21 is not limited.

[0107] For example, the expansion wall 21 is an arc surface, that is, the expansion wall 21 is an arc wall.

[0108] For another example, the expansion wall 21 is a bent surface, that is, the expansion wall 21 is formed by bending a plane. For example, the plane is bent twice towards the bottom side.

[0109] In a specific embodiment, the number of side wall surfaces 20g of the second air inlet 20a is greater than or equal to 4. For example, the second air inlet 20a is a quadrilateral with an arc wall, and for another example, the second air inlet 20a is a hexagon. Compared with the conventional design of the rectangular form, the opening shape area of the second air inlet 20a of the embodiment is larger, and the ventilation effect is better.

[0110] In an embodiment, in a projection plane parallel to the first air outlet 11a, the projection of the second air inlet 20a is located in the projection range of the first air outlet 11a. In this way, the first air outlet 11a of the box body 11 and the second air inlet 20a of the fan support 20 can be matched, and the flow effect of the second air inlet 20a can be ensured.

[0111] Specifically, the opening shape of the first air outlet 11a can be consistent with the opening shape of the second air inlet 20a, and the opening area of the first air outlet 11a can also be the same as the opening area of the second air inlet 20a, so as to ensure the flow effect of the fan support 20.

[0112] In other embodiments, the opening area of the first air outlet 11a can also be greater than the opening area of the second air inlet 20a.

[0113] In an embodiment, please refer to Figure 6 andFigure 7 The fan support 20 has a first air duct 20d and a second air duct 20e. One side of the first air duct 20d is open to form a second air inlet 20a. One side of the second air duct 20e is open to form a second air outlet 20b.

[0114] The first air duct 20d extends in a fourth direction, and the second air duct 20e extends in a fifth direction. The fourth direction and the fifth direction form a first included angle.

[0115] The fan support 20 includes a flow guide surface 20f at the first included angle to guide at least part of the airflow flowing along the first air duct 20d to flow into the second air duct 20e. By providing the flow guide surface 20f, the airflow flowing in from the second air inlet 20a can be better guided to flow out through the second air outlet 20b. The swirling airflow at the first included angle can be reduced, the wind flow loss can be reduced, the total machine air volume can be increased, and the cleaning performance can be improved.

[0116] Specifically, the first air duct 20d is an air inlet air duct of the fan support 20. The second air inlet 20a can be located at any side of the first air duct 20d, that is, the second air inlet 20a can be open to form at any region of the first air duct 20d.

[0117] The second air duct 20e is an air outlet air duct of the fan support 20. The second air outlet 20b can be located at any side of the second air duct 20e, that is, the second air outlet 20b can be open to form at any region of the second air duct 20e.

[0118] The extension directions of the first air duct 20d and the second air duct 20e form a certain angle, that is, the first included angle. Due to the existence of the first included angle, there is a certain swirling airflow at the first included angle.

[0119] Exemplarily, the angle of the first included angle is less than or equal to 90°. That is, when the first included angle is an acute angle or a right angle, there is more obvious swirling airflow at the first included angle.

[0120] By providing the flow guide surface 20f at the first included angle, the airflow at the first included angle can be guided to flow towards the second air duct 20e, thereby improving the flow effect.

[0121] It should be noted that the specific shape of the flow guide surface 20f is not limited. For example, the flow guide surface 20f is a flow guide inclined surface.

[0122] For another example, the flow guide surface 20f is a flow guide arc surface. The arc surface or the inclined surface can be provided to make the flow guide surface 20f have a better flow guide effect.

[0123] In an embodiment, please refer to Figure 7The fan support 20 further comprises a side wall surface 20g opposite to the flow guide surface 20f, and the flow guide surface 20f and the side wall surface 20g are spaced to form a third air duct 20h, and the third air duct 20h is in communication with the first air duct 20d and the second air duct 20e respectively. That is, by arranging the side wall surface 20g opposite to the flow guide surface 20f, the side wall surface 20g can form the third air duct 20h together with the flow guide surface 20f. The third air duct 20h is a middle air duct, and can facilitate the airflow from the first air duct 20d to flow into the second air duct 20e.

[0124] In an embodiment, the third air duct 20h forms a second included angle with the first air duct 20d, and the third air duct 20h forms a third included angle with the second air duct 20e, and the angles of the second included angle and the third included angle are both greater than the angle of the first included angle. In this way, the flow guiding effect of the third air duct 20h can be greatly improved, and the formation of the swirling airflow can be reduced.

[0125] Specifically, since the third air duct 20h is formed between the first air duct 20d and the second air duct 20e, the included angles between the third air duct 20h and the first air duct 20d and the second air duct 20e are greater than the angle of the first included angle, so that the included angle of the fan support 20 can be increased to reduce the formation of the swirling airflow.

[0126] In an embodiment, referring to Figure 6 The fan support 20 comprises a support base 22 and a support upper shell 23, the support base 22 has the flow guide surface 20f, the support upper shell 23 has the side wall surface 20g, and the support base 22 is detachably arranged on the support upper shell 23 to jointly form the third air duct 20h. In this way, the fan support 20 adopts a detachable structure, which can facilitate the disassembly and assembly of the fan support 20, and can facilitate the maintenance and replacement.

[0127] In the description of the present application, the description of the terms "in an embodiment", "in some embodiments", "in a specific embodiment", or "exemplary" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms is not necessarily for the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. Furthermore, the different embodiments or examples described in the present application and the features of the different embodiments or examples can be combined by those skilled in the art without contradiction.

[0128] The above merely provides preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.

Claims

1. A screen structure, characterized by The filter screen structure comprises: a filter screen support having a filter screen mounting area, the filter screen mounting area comprising at least a filter screen first mounting area and a filter screen second mounting area, the filter screen first mounting area being located on one side of the filter screen second mounting area along a first direction; along a second direction, the filter screen first mounting area has a greater extension length than the filter screen second mounting area; wherein the first direction and the second direction are perpendicular to each other; a filter screen, the filter screen being arranged on the filter screen support and having a shape matching the filter screen mounting area.

2. The screen structure of claim 1, wherein, The filter screen comprises at least a first filter screen and a second filter screen; the first filter screen is arranged in the filter screen first mounting area; the second filter screen is arranged in the filter screen second mounting area; along the second direction, the first filter screen has a greater length than the second filter screen.

3. The screen structure according to claim 1 or 2, characterized in that The filter screen mounting area further comprises at least a filter screen third mounting area.

4. The screen structure of claim 3, wherein, The filter screen comprises a third filter screen arranged in the filter screen third mounting area.

5. The screen structure of claim 1 or 2, wherein, The filter screen first mounting area and the filter screen second mounting area are located in the same plane.

6. The screen structure of claim 1 or 2, wherein, Along at least one side of the second direction, the filter screen first mounting area comprises a first side wall, and the filter screen second mounting area comprises a second side wall; Along the second direction, the first side wall protrudes relative to the second side wall to jointly form a transition step.

7. The screen structure of claim 6, wherein, The filter screen support further comprises a connecting wall, opposite ends of the connecting wall being connected to the first side wall and the second side wall respectively to form a reinforcing cavity together with the first side wall and the second side wall.

8. The screen structure of claim 7, wherein, The connecting wall is an arc-shaped wall; and / or, Along a third direction, at least one side of the reinforcing cavity is closed; wherein the third direction is perpendicular to the first direction and the second direction respectively.

9. A dust box assembly characterized by, The dust box assembly comprises: a box body having a first air inlet, a first air outlet and a containing cavity, the first air inlet and the first air outlet being in communication with the containing cavity to form an air flow path along which air flows through the first air inlet, the containing cavity and the first air outlet in sequence; the filter screen structure according to any one of claims 1-8, the filter screen structure being arranged in the containing cavity and located on the air flow path.

10. The dust box assembly of claim 9, wherein, The filter screen structure is arranged in the containing cavity to divide a dust collecting cavity located on a side of the filter screen structure close to the first air inlet; and / or, The first air outlet is located on a side of the filter screen second mounting area away from the filter screen first mounting area, and the first air outlet is in communication with the filter screen first mounting area and the filter screen second mounting area away from the first air inlet respectively.

11. The dust box assembly of claim 9 or 10, wherein, The containing cavity has a first containing area and a second containing area in communication with each other; the filter screen first mounting area is located in the first containing area, and the filter screen second mounting area is located in the second containing area; Along the second direction, the first containing area has a greater extension length than the second containing area.

12. A cleaning apparatus, characterized by The dust box assembly comprises: the dust box assembly according to any one of claims 9-11; a fan support arranged on a side of the box body having the first air outlet, the fan support having a second air inlet and a second air outlet, the second air inlet being in communication with the first air outlet.

13. The cleaning apparatus of claim 12, wherein, The side wall of at least one side of the second air inlet is an expansion wall body, which is recessed in a direction away from the second air inlet to form an expansion area.

14. The cleaning apparatus of claim 13, wherein, The expansion wall body is one of a curved surface and a bent surface; and / or The number of side wall surfaces of the second air inlet is greater than or equal to 4; and / or In a projection plane parallel to the first air outlet, the projection of the second air inlet is located within the projection range of the first air outlet.

15. A cleaning apparatus as claimed in any one of claims 12 to 14, wherein, The fan support has a first air duct and a second air duct, one side of the first air duct is open to form the second air inlet, and one side of the second air duct is open to form the second air outlet. The first air duct extends in a fourth direction, the second air duct extends in a fifth direction, and the fourth direction and the fifth direction form a first included angle. The fan support includes a guide surface at the first included angle to guide at least part of the airflow flowing along the first air duct to flow into the second air duct.

16. The cleaning apparatus of claim 15, wherein, The guide surface is one of a guide inclined surface and a guide curved surface; and / or The angle of the first included angle is less than or equal to 90°.

17. The cleaning apparatus of claim 15, wherein, The fan support further includes a side wall surface opposite to the guide surface, the guide surface and the side wall surface are spaced to form a third air duct, and opposite ends of the third air duct are in communication with the first air duct and the second air duct, respectively.

18. The cleaning apparatus of claim 17, wherein, The third air duct forms a second included angle with the first air duct, and forms a third included angle with the second air duct, and the angles of the second included angle and the third included angle are both greater than the angle of the first included angle; and / or The fan support includes a support base and a support upper shell, the support base has the guide surface, the support upper shell has the side wall surface, and the support base is detachably arranged on the support upper shell to jointly enclose the third air duct.

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