Cleaner

A cleaner comprising:

• a suction motor;
• a motor housing that surrounds the suction motor;
• a pre-filter configured to filter air and supply filtered air to the suction motor, the pre-filter surrounding at least a portion of the motor housing;
• a main body that accommodates the suction motor;
• and
• a filter unit that is detachably coupled to the main body and configured to filter air discharged from the suction motor,
• wherein the filter unit includes:
• a ring-shaped filter,
• a filter frame that is configured to receive the ring-shaped filter,
• air inlets that are defined at a first side of the filter frame and configured to receive the air discharged from the suction motor, and
• an exhaust frame having air exits that are defined at a second side of the filter frame opposite the first side and that are configured to discharge the air filtered by the ring-shaped filter, the ring-shaped filter being located between the air inlets and the air exits, and
• wherein in a state in which the filter unit is coupled to the main body, the air inlets are received in the main body, and the exhaust frame is disposed outside the main body.

A cleaner comprising:

• a suction motor;
• a pre-filter configured to filter air and supply filtered air to the suction motor;
• a motor housing that surrounds the suction motor;
• a main body that accommodates the suction motor, the main body including a dust separation unit configured to separate dust by cyclonic flow;
• a filter unit detachably coupled to the main body and configured to filter air discharged from the suction motor, the filter unit including a ring-shaped filter and a filter frame configured to receive the ring-shaped filter,
• wherein the filter frame includes:
• an inner frame,
• an outer frame, wherein the outer frame and the inner frame define a filter space configured to receive the ring-shaped filter, and
• a ring-shaped filter cover that is configured to connect the inner frame to the outer frame, and
• wherein the ring-shape filter defines a hollow space through which an axis of the cyclonic flow passes, the hollow space receiving at least a portion of the motor housing.