A liquid ejection apparatus includes a liquid ejection unit configured to eject liquid and a control unit. The control unit executes calculation processing of calculating an evaporation amount of waste liquid by which the waste liquid evaporates from a waste liquid container provided with an atmosphere opening hole, and estimation processing of estimating a contained amount of the waste liquid contained in the waste liquid container, based on an additional amount of the waste liquid by which the liquid ejected by the liquid ejection unit is added to the waste liquid container as the waste liquid and a result in the calculation processing.

In this inkjet printing apparatus, an ink separation region is set in a partial region including a heater in a feedback pipe that connects an internal collecting tank and a supply tank on an ink circulation path. The ink separation region is a region in which ink in the circulation path is separated from ink in the other regions in the feedback pipe when ink circulation stops. A control unit selectively performs a normal resumption mode and a post-drainage resumption mode in accordance with a temperature of ink in the ink separation region before resuming ink circulation in the circulation path. In the post-drainage resumption mode, after at least a part of ink in the ink separation region is drained to an external collecting tank, the ink separation region and the other regions in the feedback pipe are caused to communicate with each other.

A liquid discharging apparatus, having a housing, a liquid discharging head, and a waste liquid tank for storing waste liquid, is provided. The waste liquid tank is demountably mounted in the housing through an opening formed on a sideward face on one side in a widthwise direction, which is parallel to a nozzle surface of the liquid discharging head and intersects orthogonally with a conveying direction to convey a sheet. The opening is formed between a first position and a second position apart from the first position in the conveying direction. The waste liquid tank is mounted in the housing in an arrangement such that a length in the widthwise direction is shorter than a length in the conveying direction. The waste liquid tank is mountable in and demountable from the housing along the widthwise direction of the waste liquid tank.

A liquid discharging apparatus, having a sheet conveyer path, a liquid discharging head including nozzles for discharging liquid, a cap configured to cover the liquid discharging head, a liquid receiver located at a position different from the cap and configured to receive the liquid discharged from the liquid discharging head, and a waste liquid tank demountably mountable in a housing of the liquid discharging apparatus and configured to store the liquid received by the liquid receiver, is provided.

A liquid discharge apparatus includes a liquid discharge head, a cap, a waste liquid channel, a wiper, a cleaner, and a cleaning liquid drainage. The liquid discharge head has a nozzle, from which a liquid is discharged, on a nozzle face. The cap caps the nozzle to suck a waste liquid from the nozzle. The waste liquid channel is connected to the cap and has a waste liquid outlet from which the waste liquid is drained. The wiper wipes the nozzle face. The cleaner applies a cleaning liquid to the wiper. The cleaning liquid drainage drains the cleaning liquid applied to the wiper to the waste liquid outlet.

A liquid ejection device includes a liquid ejection head, a waste liquid tank, a frame, and a cover. The liquid ejection head is configured to eject liquid. The waste liquid tank is configured to store waste liquid ejected from the liquid ejection head. The frame supports the liquid ejection head and the waste liquid tank. The cover is removably attached to the frame and covers the waste liquid tank in a first direction orthogonal to an up-down direction. The waste liquid tank has a first length in the first direction and a second length in a second direction orthogonal to the up-down direction and the first direction. The second length is longer than the first length. The waste liquid tank is removably attached to the frame and is supported to be rotatable, relative to the frame, about a first end portion of the waste liquid tank in the second direction.

The present disclosure includes: a recording head to eject ink; a storage tank to store the ink to be supplied to the recording head; a first flow path through which the ink flows from the storage tank to the recording head; a second flow path through which the ink from the recording head flows; a discharge flow path branched from a circulation flow path including the first and second flow paths and through which the ink is circulated; a waste liquid tank to store liquid discharged from the circulation flow path through the discharge flow path; a discharge unit to discharge the ink from the circulation flow path to the waste liquid tank; and a control unit to control recording by the recording head and discharge by the discharge unit. The control unit causes the discharge unit to perform the discharge during the recording of the recording head.

The inkjet recording apparatus includes a recording head, a waste ink container and a suction mechanism. The waste ink container includes a reception hole, a suction hole, a suction airflow path and a definition member. The definition member includes an intermediate layer, and a one-side layer and another-side layer between which the intermediate layer is sandwiched. The intermediate layer has an intermediate opening, and the one-side layer and the other-side layer have a one-side opening and another-side opening, respectively, both communicating with the intermediate opening. A space defined by the intermediate opening, the one-side opening and the other-side opening forms a portion of the suction airflow path. An opening area of the intermediate opening is smaller than an opening area of the one-side opening and moreover smaller than an opening area of the other-side opening.

A cooling apparatus includes a main tank and a replenishment apparatus that replenishes a refrigerant liquid in the main tank, a waste liquid tank, a waste liquid pipe, and a liquid detection apparatus. The waste liquid tank is arranged at a position lower than the main tank. The waste liquid pipe is connected to a discharge port formed in the main tank and forms a flow channel extending to the waste liquid tank from the discharge port via a specific position. The liquid detection apparatus detects the refrigerant liquid in the waste liquid pipe at the specific position. The specific position is a position higher than the discharge port and lower than an upper end of a region capable of storing the refrigerant liquid in the main tank.

A liquid ejection apparatus includes an ejection unit that ejects an ink, a waste liquid container that contains the ink as a waste liquid, and an attachment unit that attaches the waste liquid container, wherein the attachment unit includes an introduction portion that is insertable into the waste liquid container along an X axis and introduces the ink into the waste liquid container, and a holding portion that holds the introduction portion, and the introduction portion is held by the holding portion movably along a Y-Z plane orthogonal to the X axis.