Liquid supply device, liquid ejection device, and control method for pump
AssigneeSeiko Epson Corporation
InventorsYasunori ONISHI, Takashi OZAWA
Life of this patent
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Abstract
A liquid supply device includes: a force sensor which outputs an output value corresponding to a force of expansion of a detection target site of a blockage detection tube communicating with a liquid election unit for ejecting a liquid; a pump for sending out a liquid in the blockage detection tube toward the liquid ejection unit; and a control unit which stops an operation of the pump when the output value reaches a threshold. The control unit decides the threshold, using, as a reference value, the output value acquired when a predetermined condition is satisfied including that the detection target site is filled with the liquid and that the pump is stopped.
Claims7
A liquid supply device comprising:
- a force sensor which outputs an output value corresponding to a force of expansion of a detection target site of a blockage detection tube communicating with a liquid ejection unit for ejecting a liquid;
- a pump for sending out a liquid in the blockage detection tube toward the liquid ejection unit;
- and
- a control unit which stops an operation of the Dump when the output value reaches a threshold,
- wherein the control unit decides the threshold, using, as a reference value, the output value acquired when a predetermined condition is satisfied including that the detection target site is filled with the liquid and that the pump is stopped.
A pump control method in which an operation of a pump for sending out a liquid in a blockage detection tube is stopped when an output value corresponding to a force of expansion of a detection target site of the blockage detection tube, outputted from a force sensor which outputs the output value, is equal to or above a threshold, the method comprising:
- deciding the threshold, using, as a reference value, the output value acquired when the detection target site is filled with the liquid and where the pump is stopped.
Dependencies are inferred from the claim text.