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Title:
HEAT EXCHANGER
Document Type and Number:
Japanese Patent JPS59229192
Kind Code:
A
Abstract:

PURPOSE: To increase a heating surface area and improve the turbulent flow of cooling medium inside of a tube of cooling medium, by providing a spiral groove over the interior wall of cooling medium tube.

CONSTITUTION: A spiral groove 2d of a predetermined depth is formed over the interior wall of a cooling medium tube 2. The bevelled angle of this spiral groove 2d relative to the longitudinal length of cooling medium tube is arranged such that the angle αb of portion which corresponds to a curvature 2a is sufficiently smaller than the angle αa of portion which corresponds to a linear portion 2b in a step of forming the spiral groove 2d, that is, prior to the formation of curvature 2a. By making small the bevelled angle αb of curvature 2a, it becomes possible to make a portion which is less sharp acting to increase the flow resistance of cooling medium, and thereby allowing for the sufficient relaxation in the flow resistance to the cooling medium at the curvature where it is apt to increase, compared to the linear portion.


Inventors:
ISHIZAKA TAKESHI
Application Number:
JP10116484A
Publication Date:
December 22, 1984
Filing Date:
May 18, 1984
Export Citation:
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Assignee:
MATSUSHITA REFRIGERATION
International Classes:
F25B39/00; F28F1/42; (IPC1-7): F28F1/42; F25B39/00
Attorney, Agent or Firm:
Toshio Nakao



 
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