Cleaner

Abstract

A cleaner includes: a suction motor that generates suction force; a dust separation unit that separates dust from air sucked by the suction force; a motor housing that covers the suction motor; a flow guide that surrounds an outer side of the motor housing and guides air discharged from the dust separation unit to the suction motor, and a body that forms an external appearance by surrounding the flow guide and guides air discharged from the suction motor together with the flow guide.

What is claimed is: 
     
         1 . A cleaner comprising:
 a suction inlet configured to guide air into the cleaner;   a cyclone unit configured to separate dust from air that is suctioned into the cleaner through the suction inlet;   a suction motor configured to drive rotation of an impeller to generate a suction force that suctions air into the cleaner through the suction inlet;   a main body accommodating the suction motor and having an upper opening; and   a filter unit detachably coupled to the upper opening of the main body and surrounding a rotational axis of the impeller in a circumferential direction,   a first filter configured to filter air that is discharged from the cyclone unit and enters the suction motor, wherein the first filter is positioned inside the main body by the filter unit;   a second filter disposed in the filter unit and configured to filter air that is discharged from the suction motor before discharging it to an outside of the cleaner;   a filter frame extending in the circumferential direction with respect to the rotational axis in the filter unit so as to support the second filter; and   a sealing member sealing the filter unit and the main body when the filter unit is coupled to the main body, wherein the sealing member is coupled to the filter frame so as to surround the rotational axis in the circumferential direction.   
     
     
         2 . The cleaner of  claim 1 , wherein the sealing member is provided in plural spaced apart in an extending direction of the rotational axis to block air leakage from an upper part of the first filter and a lower part of the second filter, when the filter unit is coupled to the upper opening. 
     
     
         3 . The cleaner of  claim 2 , wherein the plurality of sealing members extend in the circumferential direction so as to have different radii each other. 
     
     
         4 . The cleaner of  claim 3 , wherein the plurality of sealing members are configured to prevent air from leaking before passing through the first filter or to prevent air from leaking before passing through the second filter. 
     
     
         5 . The cleaner of  claim 2 , wherein the plurality of sealing members include:
 a first sealing member coupled to an inner frame of the filter frame; and   a second sealing member coupled to an outer frame of the filter frame.   
     
     
         6 . The cleaner of  claim 5 , wherein the first sealing member is positioned radially farther than the second sealing member based on the extension line of the rotational axis of the impeller. 
     
     
         7 . The cleaner of  claim 5 , wherein the first sealing member and the second sealing member are located at different heights. 
     
     
         8 . The cleaner of  claim 1 , wherein the sealing member extend in the circumferential direction between the first filter and the second filter about the extension line of the rotation axis to have different radii. 
     
     
         9 . The cleaner of  claim 1 , wherein the sealing member is positioned radially away from the extending line of the rotational axis, and
 wherein the first filter and the second filter are formed to surround the extending line of the rotational axis.   
     
     
         10 . The cleaner of  claim 9 , wherein the first filter is disposed below the second filter and is arranged to surround an outer circumference of the suction motor. 
     
     
         11 . The cleaner of  claim 1 , wherein the sealing member is configured to prevent leakage of different air passages in the main body, and
 wherein the different air passages are defined as a first air passage through which air is sucked into the suction motor and a second air passage through which air is exhausted from the suction motor.   
     
     
         12 . The cleaner of  claim 1 , wherein the filter frame is positioned to an upper portion of the main body. 
     
     
         13 . The cleaner of  claim 12 , wherein the filter frame includes:
 an inner frame; and   an outer frame disposed around the inner frame,   wherein the second filter is disposed between the inner frame and the outer frame.   
     
     
         14 . The cleaner of  claim 13 , wherein the filter frame further includes:
 an exhaust frame having air exits and covering a upper of the second filter; and   a filter cover covering a lower of the second filter.   
     
     
         15 . The cleaner of  claim 1 , further comprising:
 a motor housing surrounding the suction motor,   wherein the main body accommodates the motor housing.   
     
     
         16 . The cleaner of  claim 15 , wherein the sealing member is positioned radially outward from the motor housing based on the extension line of the rotational axis of the impeller. 
     
     
         17 . The cleaner of  claim 15 , wherein the filter unit is configured to surround at least a portion of the motor housing. 
     
     
         18 . A cleaner comprising:
 a suction inlet configured to guide air into the cleaner;   a cyclone unit configured to separate dust from air that is suctioned into the cleaner through the suction inlet;   a suction motor configured to drive rotation of an impeller to generate a suction force that suctions air into the cleaner through the suction inlet;   a main body accommodating the suction motor and having an upper opening; and   a filter unit detachably coupled to the upper opening of the main body and surrounding a rotational axis of the impeller in a circumferential direction,   a first filter configured to filter air that is discharged from the cyclone unit and enters the suction motor, wherein the first filter is positioned inside the main body by the filter unit;   a second filter disposed in the filter unit and configured to filter air that is discharged from the suction motor before discharging it to an outside of the cleaner;   a filter frame extending in the circumferential direction with respect to the rotational axis in the filter unit so as to support the second filter; and   a sealing member sealing the filter unit and the main body when the filter unit is coupled to the main body, wherein the sealing member is coupled to the filter frame so as to surround the rotational axis in the circumferential direction,   wherein the filter frame includes:   an inner frame; and   an outer frame disposed around the inner frame,   wherein the second filter is disposed between the inner frame and the outer frame.   
     
     
         19 . The cleaner of  claim 18 , wherein the sealing member includes:
 a first sealing member coupled to an inner frame of the filter frame; and   a second sealing member coupled to an outer frame of the filter frame, and   wherein the first sealing member and the second sealing member are located at different heights.