| 摘要 |
<p>In a heat exchanger (1) where a plurality of tubes (10, 11, 12) performing heat exchange between medium (first medium) (G) flowing internally and air (second medium) (K) flowing on the outer surface are arranged at a predetermined interval, an upper first protrusion (21), an upper second protrusion (22), a lower first protrusion (31), and a lower second protrusion (32) protruding to the circulation side of air (K) are formed on each tube (10, 11, 12), the upper first protrusion (21) and the lower second protrusion (32) are butted against each other and the upper second protrusion (22) and the lower first protrusion (31) are butted against each other between adjoining tubes, an upper recess (23) into which the lower second protrusion (32) enters is formed in the upper first protrusion (21) and a lower recess (33) into which the lower first protrusion (31) enters is formed in the upper second protrusion (22).</p> |
