Ink jet recording apparatus with plural heat pipes for temperature stabilization

An ink jet recording apparatus in which recording is effected by discharging an ink from a plurality of recording heads toward a predetermined area of a recording medium at a predetermined timing, wherein:

• each of said recording heads is provided with a heat exchanging means including a first heat exchanging section contacting with substantially the whole longitudinal area of one side of said recording head for performing heat exchange between it and said recording head and a second heat exchanging section spaced from and disposed outwardly of said recording head, at least said first heat exchanging section having an elongated rectangular cross-section;
• and
• when a shorter side of said elongated rectangular first heat exchanging section is d.sub.1, a distance between said recording heads is d and a distance between a side surface of said first heat exchanging section of each heat exchanging means and an adjacent side surface of the corresponding recording head is d.sub.3, the following relationships are satisfied;
• 5.ltoreq.d.ltoreq.20 mm,
• 5.ltoreq.d.sub.1 .ltoreq.20 mm,
• 0.ltoreq.d.sub.1 .ltoreq.15 mm, and
• d>d.sub.1,
• wherein when said shorter side of said elongated first heat exchanging section is d.sub.1 and a distance between a side surface of said first heat exchanging section of each heat exchanging means and an adjacent side surface of the corresponding recording head is d.sub.3, the following relations ship is satisfied:
• d.sub.1 .ltoreq.d.sub.3.