Double pipe type heat exchanger and method for manufacturing the same

Double pipe type heat exchanger and method for manufacturing the same

  • CN 102,374,802 A
  • Filed: 06/30/2011
  • Published: 03/14/2012
  • Est. Priority Date: 08/18/2010
  • Status: Active Application
First Claim
Patent Images

1. tube-in-tube heat exchanger, this tube-in-tube heat exchanger comprises:

  • Interior pipe is limited with first flow path in the pipe in this;

    AndOuter tube, this outer tube pipe in said arranges with qualification second flow path between pipe and the said outer tube said in,Said tube-in-tube heat exchanger is characterised in that;

    Pipe comprises the helical groove on the outer peripheral face that is formed on pipe in this in said;

    This helical groove extends along the longitudinal direction of said interior pipe;

    Said outer tube comprises inwardly outstanding reduced diameter portion, makes the inner surface of said outer tube contact intermittently with the said outer peripheral face of said interior pipe.

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