Inkjet recording apparatus

An inkjet recording apparatus, comprising:

• a conveying portion that conveys a recording medium;
• a recording portion that includes a line head for each color, the line head including a plurality of recording heads that are arranged along a width direction of the recording medium orthogonal to a recording-medium conveying direction, and that execute a printing process by ejecting ink onto the recording medium conveyed by the conveying portion;
• a temperature detecting portion that detects a temperature of the recording heads;
• a cooling mechanism that cools the recording heads based on a result of detection by the temperature detecting portion;
• and
• a control portion that controls the cooling mechanism, wherein the cooling mechanism includes:
• a storing portion that stores a cooling liquid;
• a circulation path that has opposite ends thereof connected to the storing portion, that is arranged to be branched into a plurality of branch paths so as to pass near the recording heads, and that receives heat of the recording heads by means of the cooling liquid circulating therein;
• a heat dissipating portion that is arranged in the circulation path, at a position downstream from the recording heads with respect to a circulation direction of the cooling liquid, and that dissipates heat of the cooling liquid;
• and a pump that is arranged in the circulation path, at a position upstream from the recording heads with respect to the circulation direction of the cooling liquid, and that causes the cooling liquid to circulate in the circulation path, the cooling mechanism being provided one for each of the line heads, and
• wherein the control portion controls the cooling mechanism such that given a recording head that is predicted to undergo a temperature rise as compared with others of the recording heads, the control portion increases a flow amount or circulation time of the cooling liquid in whichever of the branch paths serves as a flow path of the cooling liquid flowing toward the recording head that is predicted to undergo a temperature rise, as compared with others of the branch paths.