Patent ID: 7934538
Filing Date: 2011-05-03
Classification: F24H,F28D,F28F

Abstract:
1. A heat exchanger comprising: a casing into which a heating medium is to be introduced; a plurality of heat transfer tubes arranged in the casing; a plurality of first joint tubes respectively connected to the heat transfer tubes, arranged outside the casing generally in parallel with each other and extending in a predetermined direction; a header provided with a plurality of second joint tubes extending in the predetermined direction and arranged generally in parallel with each other; and a plurality of joints of the first joint tubes and the second joint tubes; wherein the plurality of joints include at least one slide joint and at least one butt joint; wherein, at the slide joint, an end of the first joint tube and an end of the second joint tube are fitted to each other slidably in the predetermined direction; and wherein, at the butt joint, an end of either one of the first and the second joint tubes butts against a sealing surface provided at the other one of the first and the second joint tubes in the predetermined direction, the butt position of the sealing surface and the end being variable in a direction crossing the predetermined direction.