Title:
HEAT EXCHANGER
Document Type and Number:
Japanese Patent JP2014169851
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To suppress the malfunction resultant from the difference in expansion and contraction amount between a plurality of tubes.SOLUTION: A heat exchanger 10 comprises a plurality of tubes 12. The tubes 12 are inserted into through holes 41a formed on a header plate 41. The plurality of tubes 12 include first tubes 21 through which a low temperature refrigerant flows and second tubes 22 through which hot water flows. The through holes 41a for the first tubes 21 are provided with comparatively small bulges 31 formed around the through holes 41a. The through holes 41a for the second tubes 22 are provided with comparatively large bulges 32 formed around the through holes 41a. The difference in expansion and contraction amount may be generated between the first tubes 21 and the second tubes 22. The second bulges 32 are easier deformable than the first bulges 31. Therefore, the difference in expansion and contraction amount between the first tubes 21 and the second tubes 22 is mainly absorbed by the deformation of the second bulges 32.
Inventors:
SAITO MITSUKATSU
Application Number:
JP2013043271A
Publication Date:
September 18, 2014
Filing Date:
March 05, 2013
Export Citation:
Assignee:
DENSO CORP
International Classes:
F28F9/18; B60H1/00; B60H1/32; F28D1/053; F28F27/02
Attorney, Agent or Firm:
Kazuyuki Yahagi
Yasuhei Nonobe
Takanori Kubo
Yasuhei Nonobe
Takanori Kubo