| 摘要 |
<p>PURPOSE:To prevent outer ends of a flow-in pipe and a flow-out pipe from being displaced downwardly as a heating for brazing operation is carried out and further to prevent the position of the extremity end of a pipe connected at its base end to these flow-in pipe and flow-out pipe from being displaced from its designed position. CONSTITUTION:An L-shaped hook 27 is formed at an inner peripheral surface of a flow-in port 15. The hook 27 is engaged with an inner end edge of a flow-in pipe 17. Under this engagement, even if the flow-in port 15 is softened by heating operation for a brazing, the outer end of the flow-in pipe 17 is not displaced downwardly.</p> |
