Dust-collecting box and cleaning device

Abstract

A dust-collecting box includes a dust-collecting box body and a filter screen. The dust-collecting box body defines a dust inlet, a dust receiving cavity and an exhaust passage which are communicated in sequence, an air inlet end of the exhaust passage is in communication with the dust receiving cavity, and an air outlet end of the exhaust passage is in pneumatic communication with a fan assembly. The filter screen is arranged between the air inlet end and the air outlet end, the filter screen filters an airflow entering the exhaust passage from the dust receiving cavity, an exhaust direction of the air outlet end is defined as a preset reference direction, and the filter screen is arranged obliquely relative to the preset reference direction.

What is claimed is: 
     
         1 . A dust-collecting box, comprising:
 a dust-collecting box body, the dust-collecting box body defining a dust inlet, a dust receiving cavity and an exhaust passage which are communicated in sequence, an air inlet end of the exhaust passage being in communication with the dust receiving cavity, and an air outlet end of the exhaust passage configured to be in pneumatic communication with a fan assembly; and   a filter screen, the filter screen arranged between the air inlet end and the air outlet end, the filter screen configured to filter an airflow entering the exhaust passage from the dust receiving cavity, an exhaust direction of the air outlet end defined as a preset reference direction, and the filter screen arranged obliquely relative to the preset reference direction.   
     
     
         2 . The dust-collecting box of  claim 1 , wherein the dust-collecting box body comprises a first side surface, a second side surface opposite to the first side surface, and a top surface connecting the first side surface and the second side surface, the dust inlet is arranged through the first side surface, the air outlet end is arranged through the second side surface, and the filter screen is arranged obliquely in a corner area between the second side surface and the top surface. 
     
     
         3 . The dust-collecting box of  claim 1 , wherein the dust-collecting box body comprises a box and a first cover;
 the box defines an open end and the dust inlet, the first cover covers the open end, the first cover and the box cooperatively define the dust receiving cavity, the first cover defines the exhaust passage, and the filter screen is installed on the first cover via the exhaust passage.   
     
     
         4 . The dust-collecting box of  claim 3 , wherein the first cover comprises a mounting recess part extending to the dust receiving cavity, the mounting recess part defines the exhaust passage, the mounting recess part comprises a mounting plate arranged at the air inlet end, the mounting plate is obliquely arranged relative to the preset reference direction, and the mounting plate defines an air passing opening that is in communication with the dust receiving cavity and the exhaust passage;
 the filter screen is detachably installed in the mounting recess part and attached to the mounting plate, and the filter screen covers the air passing opening to filter the airflow flowing from the air passing opening to the exhaust passage.   
     
     
         5 . The dust-collecting box of  claim 4 , wherein an included angle a is formed by the filter screen and the first cover, where 100°≤included angle a≤140°. 
     
     
         6 . The dust-collecting box of  claim 4 , wherein the filter screen is in sliding fit with the mounting recess part and is capable of being pulled away from the air outlet end. 
     
     
         7 . The dust-collecting box of  claim 4 , wherein an inner wall of the mounting recess part defines a limiting part, the filter screen comprises a fixed bracket and a filter screen body positioned on the fixed bracket, and the fixed bracket comprises a clamping part which is clamped with the limiting part. 
     
     
         8 . The dust-collecting box of  claim 7 , wherein the fixed bracket comprises a bracket main body and two side plates respectively connected to two opposite sides of the bracket main body, and the clamping part is an elastic buckle formed on one side of each side plate far away from the bracket main body;
 the mounting recess part comprises side panels respectively connected to two opposite sides of the mounting plate, a guide rail extending in a depth direction of the exhaust passage is mounted on each side panel, the limiting part is a limiting groove defined on the guide rail, and each side plate is capable of sliding between the guide rail and the mounting plate, such that the elastic buckle is clamped into the limiting groove.   
     
     
         9 . The dust-collecting box of  claim 8 , wherein the fixed bracket further comprises an operating plate connected with the bracket main body, and the operating plate is located between the two side plates;
 the filter screen is capable of being pulled away from the air outlet end by applying a force to the operating plate.   
     
     
         10 . The dust-collecting box of  claim 9 , wherein the mounting recess part further comprises a fixed plate, the fixed plate is arranged opposite to the bracket main body, and two side edges of the fixed plate are respectively connected with the two side panels, and one side of the operating plate far away from the bracket main body is in sliding contact with the fixed plate. 
     
     
         11 . The dust-collecting box of  claim 4 , wherein the box comprises a main body and a second cover, the dust inlet and the open end are respectively located on two opposite sidewalls of the main body, the second cover is positioned on a top portion of the main body, the second cover comprises a dust blocking board, and the dust blocking board is convexly positioned on an inner surface of the second cove and covers a gap between the second cover and the mounting recess part. 
     
     
         12 . The dust-collecting box of  claim 11 , wherein the top portion of the main body defines a mounting opening, the main body further defines an insertion slot on an outer periphery of the mounting opening, the second cover comprises an insertion plate on one side thereof, and the insertion plate is inserted into the insertion slot. 
     
     
         13 . The dust-collecting box of  claim 4 , wherein the mounting recess part further comprises a fixed plate arranged opposite to the mounting plate, the fixed plate and the mounting plate are arranged at an acute angle, and the exhaust passage is formed between the fixed plate and the mounting plate. 
     
     
         14 . The dust-collecting box of  claim 13 , wherein an upper surface of the filter screen facing away from the mounting plate is spaced apart from the fixed plate, and the dust-collecting box body further comprises a fixed bracket detachably installed in the space between the filter screen and the fixed plate, and two opposite sides of the fixed bracket are respectively fixed against the filter screen and the fixed plate. 
     
     
         15 . The dust-collecting box of  claim 3 , wherein the first cover further defines a dust discharging opening, and the dust discharging opening is located below the air outlet end. 
     
     
         16 . The dust-collecting box of  claim 3 , further comprising a pivoting shaft, wherein the first cover is rotatably connected with the box through the pivoting shaft, the first cover is clamped with the box, and the first cover is capable of rotating around the pivoting shaft to open or cover the open end. 
     
     
         17 . The dust-collecting box of  claim 16 , wherein the first cover comprises a first buckle, the first buckle is positioned on one side of the first cover, the first buckle is formed with a clamping position, and the pivoting shaft is positioned on an outer wall of the box and clamped in the clamping position. 
     
     
         18 . The dust-collecting box of  claim 17 , wherein the box comprises a buckle position positioned on one outer sidewall of the box opposite to the pivoting shaft, the first cover comprises a second buckle positioned on another side of the first cover opposite to the first buckle, and the second buckle is elastically clamped with the buckle position. 
     
     
         19 . The dust-collecting box of  claim 14 , wherein the fixed bracket comprises a bracket main body and an operating part connected with the bracket main body, and the bracket main body is configured to press the filter screen as a whole to ensure that the filter screen is closely attached to the mounting plate, the operating parts abut against a surface of the fixed plate to ensure that the fixed bracket press the filter screen as a whole. 
     
     
         20 . A cleaning device, comprising a device main body and the dust-collecting box of  claim 1 , wherein the device main body defines an air suction opening communicated with the air outlet end.