Provided are a filter unit which may easily replace a filter, and a refrigerator including the same. To this end, a filter unit according to the present disclosure includes a filter which purifies water, a filter head which is disposed on one end portion of the filter, and includes an inlet port which supplies raw water to the filter and is formed to protrude from one side thereof, and an outlet port which discharges pure water purified by the filter and is formed to protrude from the other side thereof, a filter housing which is formed with a filter accommodation space in which the filter is accommodated, a filter bracket which is coupled to the filter housing, and includes an inlet port coupling part to which the inlet port is coupled rotatably, and an outlet portion coupling part to which the outlet port is coupled rotatably, and a filter door which is coupled to the filter housing to open and close the filter accommodation space.

A separation tank device may include a holding tank having a tank wall coupled to and extending above a tank base. A base wall may be coupled to and may extend above the tank base. The base wall may form a base upper aperture that is opposingly positioned to the tank base, and a base lower aperture may be formed in the base wall. The device may further include a movable wall having a movable upper aperture and a movable lower aperture, and the movable wall may be movable between a first position and a second position. When the movable wall is in the first position, the movable lower aperture may be positioned above and aligned with the base upper aperture, and when the movable wall is in the second position the movable lower aperture may be unaligned with the base upper aperture.

Certain embodiments include a screen assembly of a vessel, where the screen assembly includes a plurality of fixed elements and a retainer, and the retainer includes a ring, a plurality of wedges disposed about the ring, and a plurality of keyholes at spaced locations about the ring. Each keyhole includes a bore and a slot extending from the bore into an adjacent wedge of the plurality of wedges, the slots have a width less than the bores, and the retainer may receive the fixed elements through the bores and may be rotated in a relation with the plurality of fixed elements to bring the plurality of fixed elements into simultaneous engagement with the wedges.

A connection assembly includes a manifold configured to attach a removable cartridge and a connector pipe with a flange. The flange is disposed between an upper plate and a lower plate of the manifold and has a width that prevents tilting of the connector pipe at greater than a maximum tilt angle. The connector pipe is configured to be inserted into a port of the removable cartridge in which an O-ring is compressed between the connector and the port. A filter assembly includes a manifold, a filter removably attached to the manifold, a connector pipe with a flange disposed between an upper plate and a lower plate of the manifold, and an O-ring. The O-ring is compressed between the connector pipe and the port.

A water tank for a household appliance having a connection for a filter cartridge, wherein an annular tank sealing face is provided on the tank bottom for the tight connection of the filter cartridge and the tank sealing face encloses a tank passage opening for the water from the filter cartridge to flow through the wall of the tank bottom to the household appliance, characterized in that the tank sealing face along its circumference has a variable radius in relation to a central axis, so that the tank sealing face comprises radial concavities and/or radial convexities, wherein the convexities and/or concavities have a round profile, and wherein the concavities and/or convexities are configured to periodically oscillate around a circular line.

A modular filtration platform having at least one manifold head and at least one respective filter cartridge assembly. Each manifold head is connected to one another to establish a water flow in a series or parallel manner. Each filter cartridge assembly is releasably secured from rotation relative to the manifold head by a locking mechanism. An aperture on the filter cartridge assembly annular collar mates with a protruding resilient extension on either the manifold head or support bracket. Alternatively, an aperture on the filter cartridge assembly annular collar and an aperture on the manifold head annular collar mate with a protruding member from a locking ring extending through both apertures. An integrated sensor package may be integrated with the system for true managed water visible/audible indications and Wi-Fi interface to facilitate virtually instantaneous response times for filtration needs.

A filtration system interconnection structure having a filter manifold including a sump and a coded polymagnet located on or connected to a portion of the manifold, and a filter cartridge including a filter media, first and second end caps sealed to the filter media, and a paired coded polymagnet magnet located on or connected to the filter cartridge. The polarity profiles of the paired coded polymagnets are aligned such that a magnetic attraction force, magnetic repulsion force, or combination thereof, is generated therebetween when the filter cartridge is inserted within the manifold sump housing and moved to the alignment position, thereby causing the coded polymagnet located on or connected to the manifold to translate with respect to a longitudinal axis of the sump to allowing for direct or indirect actuation of downstream system functionality.

A filter attachment and detachment apparatus removably attaching a filter container containing a filter, as a part of a filtration apparatus that filters fluid with the filter, includes a first mounting protrusion at one end of the filter container to protrude from the filter container, the first mounting protrusion including a flow path in fluid communication with the filter inside the filter container, a rotation element to which a first flow path for the fluid is connected, the rotation element including an opening groove configured to receive the first mounting protrusion, and a first mounting protrusion holding part configured to rotatably hold the rotation element. The first mounting protrusion holding part includes an inner periphery surface and a notch communicating with an outer side of the inner periphery surface, where in a state where the first mounting protrusion is inserted into the opening groove through the notch, by rotating the rotation element, the first mounting protrusion is bound between the inner periphery surface of the first mounting protrusion holding part and the rotation element.

An exchangeable filter insert that separates an unfiltered side and a filtered side of a filter, the filter having a filter housing, an inlet for liquid to be filtered and an outlet for filtered liquid. A filter bypass valve has a valve seat and a valve body guided so as to be movable relative to the valve seat and preloaded in the closing direction. The valve seat is fixed to the filter. The valve body is guided in the filter so as to be fixed to the filter. A spring that preloads the valve body in the closing direction is guided in the filter so as to be fixed to the filter. The filter insert has a spring prestresser support that, in the state in which the insert is placed into the filter housing, supports and pre-stresses the spring at its end facing away from the valve body.

A strainer assembly for a fluid tank is provided. The strainer assembly includes an access plate configured to cover an opening of the fluid tank. The access plate has an elongated cavity and a stopper structure provided on an inner surface of the elongated cavity. The strainer assembly further includes a strainer having a locking assembly for securing the strainer to the access plate such that the strainer is positioned inside the fluid tank. The locking assembly includes a head portion and a body portion having an engagement structure. The body portion is positioned inside the elongated cavity such that the head portion abuts the access plate and the engagement structure engages with the stopper structure to restrict an axial movement of the strainer.