Patent ID: 8876243
Filing Date: 2014-11-04
Classification: B41J

Abstract:
1. An inkjet recording device comprising: a first pressure source which contains ink and causes the ink to have a first energy per unit volume relative to a reference static ink under atmospheric pressure at a height level of nozzles of a print head; an upstream-side flow channel which connects the first pressure source to the print head; a second pressure source which contains ink which has passed through the print head, and causes the ink to have a second energy per unit volume relative to the reference static ink; a downstream-side flow channel which connects the print head to the second pressure source; a return flow channel which connects the second pressure source to the first pressure source and completes a circulation channel; a first temperature sensor; a second temperature sensor; and a control device which changes at least one of the energies per unit volume of the first and second pressure sources, the print head comprising a nozzle branch point which connects the upstream-and downstream-side flow channels to the nozzles, the first temperature sensor configured to detect an ink temperature of ink that is upstream of the nozzle branch point, the second temperature sensor configured to detect an ink temperature of ink that is downstream of the nozzle branch point, and the control device configured to maintain an ink pressure in the nozzles at a predetermined value by controlling at least one of the first and second energies per unit volume based on a flow channel resistance ratio of a flow channel resistance of the upstream-side flow channel and a flow channel resistance of the downstream-side flow channel, the flow channel resistances being determined based on the temperatures detected by the first and second temperature sensors.