Recording apparatus and control method therefor

Patent metadata

Field	Value
Publication number	US-10946646-B2
Application number	US-201916514383-A
Country	US
Kind code	B2
Filing date	Jul 17, 2019
Priority date	Jul 30, 2018
Publication date	Mar 16, 2021
Grant date	Mar 16, 2021

Abstract

Heating is conducted sequentially by dividing a heating operation into first heating control and second heating control consuming higher electric power than that in the first heating control.

First claim

What is claimed is:

1. A recording apparatus comprising:
a recording head including an ejection port for ejecting ink and a heating element for heating the recording head to heat ink in the recording head;
a detection unit configured to detect a temperature of the recording head;
an electric accumulation unit configured to accumulate electric power supplied from an external power supply;
an acquisition unit configured to acquire information about an accumulated electricity amount accumulated in the electric accumulation unit; and
a heating control unit configured to drive the heating element to heat the recording head such that the recording head temperature reaches a reached target temperature with use of the electric power accumulated in the electric accumulation unit based on a detection result of the recording head temperature by the detection unit and the acquired information,
wherein, in a state in which the electric power is being supplied from the external power supply to the electric accumulation unit, the heating control unit conducts first heating control of heating the recording head to a middle target temperature and then heats the recording head in second heating control of consuming higher electric power than that in the first heating control to increase the recording head temperature to a reached target temperature, which is higher than the middle target temperature, and the heating control unit conducts the first heating control such that the accumulated electricity amount of the electric accumulation unit does not fall below an accumulated electricity amount required for the second heating control at a stage of moving from the first heating control to the second heating control.

2. The recording apparatus according to claim 1 , wherein the heating control unit acquires the detection result of the recording head temperature during the first heating control and, in a case in which the temperature shown by the detection result is higher than a threshold value, the heating control unit moves heating control for the recording head from the first heating control to the second heating control.

3. The recording apparatus according to claim 2 , wherein, in a case in which the reached target temperature is a first temperature, the threshold value is set to a first value and, in a case in which the reached target temperature is a second temperature, which is higher than the first temperature, the threshold value is set to a second value, which is higher than the first value.

4. The recording apparatus according to claim 2 , further comprising a detection unit configured to detect supply power to be supplied from the external power supply to the electric accumulation unit,
wherein, based on the supply power detected, at time of conducting the first heating control, the heating control unit conducts heating with electric power equal to or less than the supply power and, in a case in which the supply power is first power, the threshold value is set to a third value and, in a case in which the supply power is second power, which is higher than the first power, the threshold value is set to a fourth value, which is higher than the third value.

5. The recording apparatus according to claim 1 , further comprising a time-keeping unit configured to keep time,
wherein, in accordance with time kept by the time-keeping unit, the heating control unit ends the first heating control when a predetermined amount of time has passed since start of the first heating control and starts the second heating control.

6. The recording apparatus according to claim 1 , wherein, in a case in which the accumulated electricity amount shown by the acquired information is larger than a predetermined accumulated electricity amount, the heating control unit starts the first heating control.

7. The recording apparatus according to claim 6 , wherein the predetermined accumulated electricity amount is an electric power amount to be consumed in the second heating control.

8. The recording apparatus according to claim 1 , further comprising a power detection unit configured to detect supply power to be supplied from the external power supply to the electric accumulation unit,
wherein, based on the supply power detected, at time of conducting the first heating control, the heating control unit heats the recording head with electric power equal to or less than the supply power.

9. The recording apparatus according to claim 1 , wherein, in a case in which the recording head is heated to the reached target temperature in the second heating control without conducting the first heating control, an accumulated electricity amount that can be accumulated in the electric accumulation unit is smaller than an electric power amount to be consumed.

10. The recording apparatus according to claim 1 , wherein the heating control unit conducts the first heating control and the second heating control before starting ejecting ink as preparation for ink ejection of the recording head.

11. The recording apparatus according to claim 1 , wherein, when the recording head temperature decreases to a third target temperature, which is lower than the reached target temperature, after the heating control unit ends the second heating control, ink is ejected from the ejection port to cause preliminary ejection not contributing to image recording to be conducted.

12. A recording apparatus comprising:
a recording head including an ejection port for ejecting ink and a heating element for heating the recording head to heat ink in the recording head;
a first detection unit configured to detect a temperature of the recording head;
an electric accumulation unit configured to accumulate electric power supplied from an external power supply;
a second detection unit configured to detect supply power to be supplied from the external power supply to the electric accumulation unit; and
a heating control unit configured to drive the heating element such that the recording head temperature reaches a target temperature based on a detection result of the recording head temperature by the first detection unit and the supply power detected by the second detection unit,
wherein, in a state in which the electric power is being supplied from the external power supply to the electric accumulation unit, the heating control unit conducts first heating control of heating the recording head to a middle target temperature and then heats the recording head in second heating control of consuming higher electric power than that in the first heating control to increase the recording head temperature to an ultimate target temperature, which is higher than the middle target temperature and, in the first heating control, the heating control unit heats the recording head with electric power equal to or less than the supply power detected.

13. The recording apparatus according to claim 12 , wherein the heating control unit acquires the detection result of the recording head temperature during the first heating control and, in a case in which the temperature shown by the detection result is higher than a threshold value, the heating control unit moves heating control for the recording head from the first heating control to the second heating control.

14. The recording apparatus according to claim 12 , further comprising a time-keeping unit configured to keep time,
wherein, in accordance with time kept by the time-keeping unit, the heating control unit ends the first heating control when a predetermined amount of time has passed since start of the first heating control and starts the second heating control.

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Assignees

• Canon Kk

Inventors

• Oonuki Kenichi
• Kobayashi Daisuke
• Seki Satoshi
• Doi Tsukasa

Classifications

• B41J2/04563 Primary

  detecting head temperature; Ink temperature · CPC title

• B41J2/0458

  controlling heads based on heating elements forming bubbles · CPC title

• B41J2/04528

  aiming at warming up the head · CPC title

• B41J2/0457 Primary

  Power supply level being detected or varied · CPC title

• B41J2/16526

  by applying pressure only · CPC title