Abstract: A liquid discharge device executes liquid discharge processing for sucking in air from inside a cap covering a plurality of nozzles to discharge liquid in a liquid ejection head via the cap. The liquid ejection head includes an outflow port in communication with an anterior chamber and outside of the liquid ejection head. A first discharge path is in communication with the inside of the cap and a liquid recovery vessel. A suction device executes the liquid discharge processing by sucking in air from the inside of the cap via the first discharge path. A second discharge path is in communication with the outflow port and the cap or a portion of the first discharge path between the cap and the suction device.

Abstract: A primary chamber is connected to an inflow path. A secondary chamber is connected to an outflow path and has an opening formed therein. A cover member closes the opening and includes a diaphragm. An outflow path inlet is connected to a first end portion of the secondary chamber and the connecting hole is connected to a portion closer to a second end portion than the first end portion of the secondary chamber.

Abstract: A primary chamber is connected to an inflow path. A secondary chamber is connected to an outflow path and has an opening formed therein. A cover member closes the opening and includes a diaphragm. An outflow path inlet is connected to a first end portion of the secondary chamber. A second end portion of the secondary chamber has a dimension in a direction in which the primary chamber and the secondary chamber are arranged, the dimension being smaller than the first end portion.

Abstract: A primary chamber communicates with an inflow path. A secondary chamber communicates with an outflow path and includes an opening. A partition separates the primary chamber from the secondary chamber. A communication hole is formed in the partition. A cover member covers the opening and includes a diaphragm that contracts and expands according to a change in pressure in the secondary chamber. A valve opens and closes the communication hole according to the contraction and expansion of the diaphragm. An outflow path entrance corresponding to one of ends of the outflow path that enables the outflow path to communicate with the secondary chamber is formed in a top portion of an inner surface of the secondary chamber.

Abstract: A liquid expelling apparatus is capable of performing a liquid expelling process to expel liquid from a liquid ejecting head through a cap covering a plurality of nozzles of the liquid ejecting head by sucking in air from the cap. A control apparatus causes the liquid ejecting head to perform a liquid ejecting process according to occurrence of a liquid expelling event and causes the liquid expelling apparatus to perform the liquid expelling process, concurrently with start of the liquid ejecting process or following the start of the liquid ejecting process.

Abstract: A liquid discharge device executes liquid discharge processing for sucking in air from inside a cap covering a plurality of nozzles to discharge liquid in a liquid ejection head. The liquid ejection head includes an outflow port in communication with an anterior chamber. A suction device executes the liquid discharge processing by sucking in air from the inside of the cap via a first discharge path. A second discharge path is in communication with the outflow port and the inside of the cap or a portion of the first discharge path between the cap and the suction device. The suction device includes a suction pump, a buffer tank, and a first discharge path valve. The first discharge path valve is switched from a closed state to an opened state after the suction pump is operated and stopped when the first discharge path valve is in the closed state.

Abstract: A supply path forming the flow path of a liquid supplied from a liquid storage portion to a liquid ejection head includes a first supply path and a second supply path. The first supply path includes a coiled tube that is elastically deformable, and is connected to the movable liquid ejection head. The second supply path includes a base member made of synthetic resin that forms a groove through which the liquid flows and a joining flow path having a film joined to the base member in a state that blocks an opening of the groove, and is connected to the liquid storage portion and the first supply path.

Abstract: A primary chamber communicates with an inflow path. A secondary chamber communicates with an outflow path and includes an opening. A partition separates the two chambers, and a communication hole is formed therein. A cover member covers the opening and includes a diaphragm that contracts and expands according to a change in pressure in the secondary chamber. A valve opens and closes the communication hole according to the contraction and expansion of the diaphragm. An outflow path entrance corresponding to one end of the outflow path that enables the outflow path to communicate with the secondary chamber is formed in a top portion of an inner surface of the secondary chamber. An outflow guiding surface continuous with an edge of the outflow path entrance in the inner surface of the secondary chamber is formed to be inclined diagonally upward in a direction of the edge of the outflow path entrance.

Abstract: A degassing device removes air dissolved in liquid under a pressure decreased atmosphere. The degassing device includes a liquid tank, a pressure decreasing device, and a lifting/lowering device. The liquid tank has a small sectional part and a large sectional part provided above or below the small sectional part and having a horizontal sectional area larger than that of the small sectional part, and stores the liquid. The pressure decreasing device decreases pressure in the liquid tank. The lifting/lowering device lifts and lowers the liquid surface in the liquid tank to the small sectional part and the large sectional part.

Abstract: An inkjet recording apparatus (1) includes a recording head (21) which ejects a liquid; a bubble countermeasure means for executing a bubble countermeasure treatment determined as a countermeasure against bubbles generated in the liquid; a bubble generation amount calculation means for calculating an amount of bubbles generated from the liquid; and a control device (38) which relaxes the bubble countermeasure treatment when the amount of bubble generation calculated by the bubble generation amount calculation means is equal to or less than a predetermined amount.

Abstract: A degassing device (40) includes a liquid tank (32) which stores the liquid; a pressure reducing device (62) which reduces pressure in the liquid tank (32); a circulation flow path (47) which connects different positions of the liquid tank (32); and a circulation device (67) which circulates the liquid through the circulation flow path (47). When air dissolved in the liquid in the liquid tank (32) is removed, the degassing device (40) is switchable into a first degassing operation in which while the circulation device (67) circulates the liquid through the circulation flow path (47), the pressure reducing device (62) reduces the pressure in the liquid tank (32), and into a second operation in which the circulation device (67) stops the circulation of the liquid through the circulation flow path (47) and the pressure reducing device (62) reduces the pressure in the liquid tank (32).

Abstract: A degassing device removes air dissolved in liquid under a pressure decreased atmosphere. The degassing device includes a liquid tank, a pressure decreasing device, a dipping member, and a lifting device. The liquid tank stores the liquid. The pressure decreasing device decreases pressure in the liquid tank. The dipping member is dipped in the liquid in the liquid tank. The lifting device lifts and lowers the dipping member in a dipping state where the dipping member is positioned on a liquid surface of the liquid in the liquid tank and a retracted state where the dipping member is retracted from the liquid surface of the liquid tank.

Abstract: A degassing device removes air dissolved in liquid under a pressure decreased atmosphere. The degassing device includes a liquid tank, a pressure decreasing device, a circulation flow pass, and a circulation device. The liquid tank stores the liquid. The pressure decreasing device decreases pressure in the liquid tank. The circulation flow pass communicates different positions of the liquid tank. The circulation device circulates the liquid through the circulation flow pass. The circulation flow pass includes an outlet port from the liquid tank to the circulation flow pass, and an inlet port from the circulation flow pass to the liquid tank below a liquid surface. A diameter of the inlet port is smaller than a diameter of the outlet port.

Abstract: A degassing device (40) a removes air dissolved in a liquid under a reduced pressure atmosphere. The degassing device (40) includes a liquid tank (32) in which the liquid is stored; a pressure reducing device (80) which reduces pressure of the liquid tank (32); a circulation flow path (47) which connects different positions of the liquid tank (32); and a circulation pump (67) which circulates the liquid through the circulation flow path (47). The pressure reducing device (80) includes a pressure reducing tank (81) connected to the liquid tank (32); a first pressure reducing valve (521) provided between the liquid tank (32) and the pressure reducing tank (81); and a pressure reducing pump (62) which reduces pressure in the pressure reducing tank (81).

Abstract: A degassing device removes air dissolved in a liquid under a pressure decreased atmosphere, and includes a liquid tank, a pressure decreasing device, a circulation flow pass, a circulation device, and a variable mechanism. The liquid tank stores the liquid. The pressure decreasing device decreases pressure in the liquid tank. The circulation flow pass communicates different positions of the liquid tank. The circulation device circulates the liquid through the circulation flow pass. The variable mechanism changes a height of an inlet port from the circulation flow pass to the liquid tank in accordance with a height of a liquid surface in the liquid tank.

Abstract: A degassing device removes air dissolved in liquid under a pressure decreased atmosphere. The degassing device includes a liquid tank, a pressure decreasing device, a circulation flow pass, and a control device. The liquid tank stores the liquid. The pressure decreasing device decreases pressure in the liquid tank. The circulation flow pass communicates different positions of the liquid tank. The circulation device circulates the liquid through the circulation flow pass. The control device drives the circulation device at least one of timing before driving the pressure decreasing device and timing before releasing the pressure decreased liquid tank to the atmosphere.

Abstract: A degassing device removes air dissolved in liquid under a pressure decreased atmosphere. The degassing device includes a liquid tank, a pressure decreasing device, and a lifting/lowering device. The liquid tank has a small sectional part and a large sectional part provided above or below the small sectional part and having a horizontal sectional area larger than that of the small sectional part, and stores the liquid. The pressure decreasing device decreases pressure in the liquid tank. The lifting/lowering device lifts and lowers the liquid surface in the liquid tank to the small sectional part and the large sectional part.

Abstract: A degassing device removes air dissolved in liquid under a pressure decreased atmosphere. The degassing device includes a liquid tank, a pressure decreasing device, a circulation flow pass, a circulation device, and a floating body. The liquid tank stores the liquid. The pressure decreasing device decreases pressure in the liquid tank. The circulation flow pass communicates different positions of the liquid tank. The circulation device circulates the liquid through the circulation flow pass. The floating body floats on a liquid surface in the liquid tank. An inlet port from the circulation flow pass to the liquid tank is provided above the liquid surface. The liquid flowing in through the inlet port into the liquid tank falls on the floating body above the liquid surface.

Abstract: A negative pressure regulation valve includes a pressure chamber, a valve member, a diaphragm portion, a pressure receiving plate, and a biasing member. The pressure chamber has a liquid inflow port, and a liquid outflow port formed above the liquid inflow port. The pressure receiving plate is displaced with the diaphragm portion to the inside and the outside of the pressure chamber, thereby changing a capacity of the pressure chamber. The valve member is caused to move with the pressure receiving plate to a closing position for closing the ink inflow port and an opening position for opening the ink inflow port. When the pressure receiving plate is displaced to the inside and the outside of the pressure chamber, the capacity of the pressure chamber changes by a larger amount from an upper part toward a lower part of the pressure chamber with respect to a direction of gravity.

Abstract: A degassing device removes air dissolved in liquid under a pressure decreased atmosphere. The degassing device includes a liquid tank, a pressure decreasing device, a dipping member, and a lifting device. The liquid tank stores the liquid. The pressure decreasing device decreases pressure in the liquid tank. The dipping member is dipped in the liquid in the liquid tank. The lifting device lifts and lowers the dipping member in a dipping state where the dipping member is positioned on a liquid surface of the liquid in the liquid tank and a retracted state where the dipping member is retracted from the liquid surface of the liquid tank.