Patent ID: 11944923
Assignee: ACLARIS WATER INNOVATION GMBH, LINDAU, ZWEIGNIEDERLASSUNG REBSTEIN
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  A | IPC B

Claim 0:
1. A water tank for a household appliance having a connection for a filter cartridge, the water tank comprising:
a tank bottom; and
a tank sealing face on the tank bottom and configured to connect the filter cartridge to the water tank, wherein
the tank sealing face encloses a tank passage opening for water from the filter cartridge to flow through a wall of the tank bottom to the household appliance,
the tank sealing face includes, along a circumference of the tank sealing face, a variable radius in relation to a central axis of the tank sealing face, so that the tank sealing face comprises radial concavities and radial convexities, wherein the radial convexities and the radial concavities of the tank sealing face have a round profile, and wherein the radial concavities and the radial convexities of the tank sealing face are configured to periodically oscillate around a circular line of the tank sealing face,
the filter cartridge has a filter housing comprising a filter housing wall that separates a housing internal side from a housing external side,
a filter inlet opening which in operation of the filter cartridge is open in relation to an external environment of the filter housing is provided,
a device for water conduction which comprises at least one filter chamber having at least one filter medium and terminates in filter outlet opening for suctioning water from the filter cartridge is provided in an interior of the filter housing downstream of the filter inlet opening relative to a flow direction during operation,
a filter connection element having an annular filter port which has a filter sealing face for tight connection of the filter cartridge to the tank sealing face in the water tank is provided, and
a profile of the filter sealing face along a circumference of the annular filter port has a variable radius in relation to a central axis of the filter outlet opening, so that the filter sealing face comprises radial convexities and radial concavities, and the radial convexities and the radial concavities of the filter sealing face have a round profile and wherein the radial convexities and the radial concavities of the filter sealing face are configured to periodically oscillate around a circular line of the filter sealing face.