| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat exchange tube of longer service life by reducing thermal stress.SOLUTION: A heat exchanger 1 includes a tube bundle 3 having a tube 4. In the tube, a first fluid can be circulated, a second fluid can be circulated around the tube, and the tube bundle is disposed in a housing 2 so that a second fluid passage can be defined. Here, an end face 5 of the tube is formed in an opened state so that the first fluid can flow therein and thereout, and a diffuser 8 is connected to the housing or the tube bundle at least at one end face of the first fluid passage. The diffuser has a collar as a fitting region, the collar is slid on the housing or the tube bundle, the diffuser has a material thickness d, and a length L2 of the fitting region is larger than the material thickness of the diffuser, the housing or the tube bundle by three or four times or more.SELECTED DRAWING: Figure 1 |
