Provided is a tank device capable of restraining splashing of flush water during water supply to suppress a water slapping sound. A tank device for supplying flush water stored therein to a flush toilet comprises: a tank main unit for storing flush water in an internal space 24C thereof defined by an inner wall surface which comprises a transverse surface 27B extending in a transverse direction and a standing surface 27A extending in an up-down direction; and a water supply member 26 for supplying flush water from a water supply port 26A to the internal space of the tank main unit, the water supply member 26 being configured to spout flush water toward the inner wall surface defining the internal space 24C, wherein the tank main unit comprises a flow rectifying portion 46 provided in a region of the inner wall surface to which flush water is spouted, the flow rectifying portion 46 having a convex part 46A and a concave part 46B each formed on the inner wall surface.

Provided is a tank device capable of restraining splashing of flush water during water supply to suppress a water slapping sound. A tank device for supplying flush water stored therein to a flush toilet comprises: a tank main unit for storing flush water in an internal space 24C thereof defined by an inner wall surface which comprises a transverse surface 27B extending in a transverse direction and a standing surface 27A extending in an up-down direction; and a water supply member 26 for supplying flush water from a water supply port 26A to the internal space of the tank main unit, the water supply member 26 being configured to spout flush water toward the inner wall surface defining the internal space 24C, wherein the tank main unit comprises a flow rectifying portion 46 provided in a region of the inner wall surface to which flush water is spouted, the flow rectifying portion 46 having a convex part 46A and a concave part 46B each formed on the inner wall surface.

A toilet assembly, comprising a toilet tank to hold flush water; a flush valve assembly positioned in the toilet tank; a toilet bowl; and a trapway inflow communication with the toilet bowl, wherein, the flush valve assembly comprises a container having an open lower end and a closed upper end; a siphon flush valve positioned in the container upper end; and a conduit positioned in an interior of the container, wherein the container is in flow communication with the toilet tank, the conduit is coupled to the trapway and provides flow communication between the container and the trapway, and the siphon flush valve comprises a tubular core, a head surrounding a top of the core, and a fluid spray initiator coupled to the head, the spray initiator configured to discharge water into the core to induce a siphon flow of surrounding tank water through the core.

A toilet assembly, comprising a toilet tank to hold flush water; a flush valve assembly positioned in the toilet tank; a toilet bowl; and a trapway inflow communication with the toilet bowl, wherein, the flush valve assembly comprises a container having an open lower end and a closed upper end; a siphon flush valve positioned in the container upper end; and a conduit positioned in an interior of the container, wherein the container is in flow communication with the toilet tank, the conduit is coupled to the trapway and provides flow communication between the container and the trapway, and the siphon flush valve comprises a tubular core, a head surrounding a top of the core, and a fluid spray initiator coupled to the head, the spray initiator configured to discharge water into the core to induce a siphon flow of surrounding tank water through the core.

A siphon valve assembly, the assembly comprising a tubular core; a head coupled to and surrounding a top of the core; and a fluid spray initiator coupled to the head; wherein a lower end of the head defines a siphon valve inlet, a lower end of the tubular core defines a siphon valve outlet, an upper end of the tubular core comprises a weir, and the spray initiator is configured to discharge a fluid into the core to induce a siphon flow of a surrounding fluid through the siphon valve inlet, over the weir, and out the siphon valve outlet.

A siphon valve assembly, the assembly comprising a tubular core; a head coupled to and surrounding a top of the core; and a fluid spray initiator coupled to the head; wherein a lower end of the head defines a siphon valve inlet, a lower end of the tubular core defines a siphon valve outlet, an upper end of the tubular core comprises a weir, and the spray initiator is configured to discharge a fluid into the core to induce a siphon flow of a surrounding fluid through the siphon valve inlet, over the weir, and out the siphon valve outlet.

A flush toilet includes a toilet main body made of ceramics and a control unit. The toilet main body includes a skirt, and a rear storage that can store at least a part of the control unit, the rear storage includes a supporting wall that divides a storage region into upper and lower regions and that supports the control unit, the skirt forms a double wall including an outer wall and an inner wall, the double wall has at least a part that forms an internal space between the outer wall and the inner wall, and the skirt includes a single wall in which the internal space of the double wall is removed in an upper end above a joining portion between the double wall and the supporting wall.

A flush toilet includes a toilet main body made of ceramics and a control unit. The toilet main body includes a skirt, and a rear storage that can store at least a part of the control unit, the rear storage includes a supporting wall that divides a storage region into upper and lower regions and that supports the control unit, the skirt forms a double wall including an outer wall and an inner wall, the double wall has at least a part that forms an internal space between the outer wall and the inner wall, and the skirt includes a single wall in which the internal space of the double wall is removed in an upper end above a joining portion between the double wall and the supporting wall.

A flush toilet includes a toilet main body and a tank device that supplies flush water to the toilet main body, where the tank device includes a storage tank provided behind the toilet main body and above a floor surface, and a water supply device that supplies the flush water to the storage tank, a capacity of an upper part located at a position higher than a middle height position that equally divides the storage tank into two in an up-down direction is greater than a capacity of a lower part located at a position lower than the middle height position, and the storage tank includes a plurality of upper surfaces with height differences, and a water passage port is provided in a manner penetrating a highest surface among the upper surfaces to allow the flush water supplied from the water supply device to flow into the storage tank.

A flush toilet includes a toilet main body and a tank device that supplies flush water to the toilet main body, where the tank device includes a storage tank provided behind the toilet main body and above a floor surface, and a water supply device that supplies the flush water to the storage tank, a capacity of an upper part located at a position higher than a middle height position that equally divides the storage tank into two in an up-down direction is greater than a capacity of a lower part located at a position lower than the middle height position, and the storage tank includes a plurality of upper surfaces with height differences, and a water passage port is provided in a manner penetrating a highest surface among the upper surfaces to allow the flush water supplied from the water supply device to flow into the storage tank.