A filtration device efficiently sizes removal of unnecessary substances adhering to and deposited on a filter medium of a filter element during filtration and backwashing (cleaning) from target (non-filtered) substances. The filter element captures substances in a fluid on one surface of a filter medium. The captured substances are separated from the filter medium during backwashing. A brush moves relative to the one surface of the filter medium and assists in separating the captured substances and sifting during the relative movement. The backwashing starts when a differential pressure between both surfaces of the filter medium exceeds a predetermined value, or the like while performing the filtration, and returns to filtration after the differential pressure is eliminated or after a predetermined time elapses. The brush sifts the unnecessary substances from the captured substances and passes the removal to the other surface side during the filtration.

A filtration device efficiently sizes removal of unnecessary substances adhering to and deposited on a filter medium of a filter element during filtration and backwashing (cleaning) from target (non-filtered) substances. The filter element captures substances in a fluid on one surface of a filter medium. The captured substances are separated from the filter medium during backwashing. A brush moves relative to the one surface of the filter medium and assists in separating the captured substances and sifting during the relative movement. The backwashing starts when a differential pressure between both surfaces of the filter medium exceeds a predetermined value, or the like while performing the filtration, and returns to filtration after the differential pressure is eliminated or after a predetermined time elapses. The brush sifts the unnecessary substances from the captured substances and passes the removal to the other surface side during the filtration.

An air purifier is provided. The air purifier according to an exemplary embodiment includes a body including an air inlet and an air outlet, an air blowing unit disposed in an inside of the body, the air blowing unit being configured to forcibly introduce outside air into the inside of the body through the air inlet and discharge air into the air outlet, a filter unit rotatably disposed between the air blowing unit and the air inlet, a driving motor configured to rotate the filter unit, and a cleaning member detachably connected to a vacuum cleaner and disposed in proximity to the filter unit to guide contaminants adhering to the filter unit to be flown into the vacuum cleaner.

A dust collector capable of recollecting the particulate dust is disclosed. The dust collector comprises a collector body having a dust collection tube, a dust collection barrel, a filter barrel which comprises a filter net and an air conduit with one end connected to the inner portion of the filter barrel and another end formed into an air outlet adaptor, a dust clean device and an air suction unit which drives the air with particulate dust to pass the filter net and a cover used to either close or open the air outlet adaptor. When the particulate dust has been accumulated on the filter net more than a preset volume, the dust collector will start to operate its clean maintenance process. The cover will be uncovered from the air outlet adaptor and one end of the dust collection tube will be fixed onto the air outlet adaptor.

The present disclosure relates to a vacuum cleaner for separating and collecting dust and other contaminants by using a multi-cyclone and a mesh filter, including a cleaning unit for sweeping dust and foreign materials attached to the mesh filter along an outer circumferential surface of the mesh filter, and a rotation unit coupled to the cleaning unit for rotating the cleaning unit relative to the mesh filter, whereby the cleaning unit can clean a surface of the filter automatically or manually during an operation of the cleaner, so that the filter surface can be kept clean, and a load on a fan unit caused due to foreign materials or dust can be reduced.

A separation device (1) for separating particles from a fluid flow, comprising a centrifugal separator (2), wherein the centrifugal separator (2) comprises a separation chamber (3), a fluid inlet (5), at least two dip tubes (7, 7) and at least one particle discharge opening (9, 9) and the separation chamber (3) is substantially formed as a rotational body. The rotational body has a casing (13) and two end faces (15, 15), the fluid inlet (5) opening into the separation chamber (3) tangentially to the surface of the casing (13) and one dip tube (7) being situated in one of the end faces (15) and the other dip tube (7) being situated in the other end face (15).

An air purifying unit in which leakage of air flowing between a filter and a blowing fan is significantly reduced, and an air cleaning/ventilation device including the same, are provided. In addition, there are an air cleaning/ventilation device detachably installed in a window, used as a ventilation device, and used as an indoor air cleaning device.

The indoor unit for the air conditioner according to the present invention includes: a cabinet assembly forming an external appearance of the indoor unit and having an air suction port formed in a rear of the cabinet assembly; a filter module disposed at the air suction port to filter dust contained in air being introduced through the air suction port; a filter cleaner configured to move upward and downward in a rear of the filter module to remove foreign substances stuck in the filter module; a guide rail vertically disposed on one side of the filter module and configured to guide upward and downward movement of the filter cleaner.

The indoor unit for the air conditioner according to the present invention includes: a cabinet assembly forming an external appearance of the indoor unit and having an air suction port formed in a rear of the cabinet assembly; a filter module disposed at the air suction port to filter dust contained in air being introduced through the air suction port; a filter cleaner configured to move upward and downward in a rear of the filter module to remove foreign substances stuck in the filter module; a guide rail vertically disposed on one side of the filter module and configured to guide upward and downward movement of the filter cleaner.

The indoor unit for the air conditioner according to the present invention includes: a cabinet assembly forming an external appearance of the indoor unit and having an air suction port formed in a rear of the cabinet assembly; a filter module disposed at the air suction port to filter dust contained in air being introduced through the air suction port; a filter cleaner configured to move upward and downward in a rear of the filter module to remove foreign substances stuck in the filter module; a guide rail vertically disposed on one side of the filter module and configured to guide upward and downward movement of the filter cleaner.