A cleaning appliance comprising: a hollow housing; a housing wall provided in the housing to divide an internal space of the housing into a first space and a second space; a wall through-hole (191,192) provided in the housing wall; an intake port, the first space communicating with an exterior of the housing via the intake port; an exhaust provided in a housing through-hole provided in the housing such that the second space communicates with the exterior of the housing through the housing through-hole, the exhaust including: a housing cover configured to be received in the housing through-hole; a cover through-hole provided in the housing cover; and an exhaust hole provided the housing cover, the second space communicating with the exterior of the housing through the exhaust hole; a fan including: a casing configured to be coupled to at least one the housing wall or a surface facing the second space such that the casing is positioned in the wall through-hole; a casing intake hole provided in the casing, the first space communicating with an interior of the casing through casing intake hole; a casing exhaust hole provided in the casing; and an impeller to generate an air flow into the interior of the casing via the casing intake hole and out of the interior of the casing via the casing exhaust hole; a separator provided in the first space to form a flow path for air from the intake port to the casing intake hole, wherein the separator separates a matter from the air flow using centrifugal force; characterized in that the cleaning appliance comprises a display including: a display panel; a display housing coupled to the display panel; and at least one housing fastening extension that is configured to couple the display housing to at least one of the housing wall or an inner circumferential surface of the housing such the display panel is positioned to be exposed to the exterior of the housing through the cover through-hole. a hollow housing; a housing wall provided in the housing to divide an internal space of the housing into a first space and a second space; a wall through-hole (191,192) provided in the housing wall; an intake port, the first space communicating with an exterior of the housing via the intake port; an exhaust provided in a housing through-hole provided in the housing such that the second space communicates with the exterior of the housing through the housing through-hole, the exhaust including: a housing cover configured to be received in the housing through-hole; a cover through-hole provided in the housing cover; and an exhaust hole provided the housing cover, the second space communicating with the exterior of the housing through the exhaust hole; a housing cover configured to be received in the housing through-hole; a cover through-hole provided in the housing cover; and an exhaust hole provided the housing cover, the second space communicating with the exterior of the housing through the exhaust hole; a fan including: a casing configured to be coupled to at least one the housing wall or a surface facing the second space such that the casing is positioned in the wall through-hole; a casing intake hole provided in the casing, the first space communicating with an interior of the casing through casing intake hole; a casing exhaust hole provided in the casing; and an impeller to generate an air flow into the interior of the casing via the casing intake hole and out of the interior of the casing via the casing exhaust hole; a separator provided in the first space to form a flow path for air from the intake port to the casing intake hole, wherein the separator separates a matter from the air flow using centrifugal force; characterized in that the cleaning appliance comprises a casing configured to be coupled to at least one the housing wall or a surface facing the second space such that the casing is positioned in the wall through-hole; a casing intake hole provided in the casing, the first space communicating with an interior of the casing through casing intake hole; a casing exhaust hole provided in the casing; and an impeller to generate an air flow into the interior of the casing via the casing intake hole and out of the interior of the casing via the casing exhaust hole; a separator provided in the first space to form a flow path for air from the intake port to the casing intake hole, wherein the separator separates a matter from the air flow using centrifugal force; characterized in that the cleaning appliance comprises a display including: a display panel; a display housing coupled to the display panel; and at least one housing fastening extension that is configured to couple the display housing to at least one of the housing wall or an inner circumferential surface of the housing such the display panel is positioned to be exposed to the exterior of the housing through the cover through-hole. a display panel; a display housing coupled to the display panel; and at least one housing fastening extension that is configured to couple the display housing to at least one of the housing wall or an inner circumferential surface of the housing such the display panel is positioned to be exposed to the exterior of the housing through the cover through-hole.