Title:
HEAT EXCHANGER
Document Type and Number:
Japanese Patent JP2023049357
Kind Code:
A
Abstract:
To suppress a reduction in the life of a heat exchanger.SOLUTION: A heat exchanger 10 including a header 20 and a plurality of heat transfer pipes 30 has anticorrosive sacrifice layers 26, 32 including zinc formed on the surface layers of the header 20 and each heat transfer pipe 30. Into holes 23 penetrating through the header 20, the heat transfer pipe 30 is inserted via a connection part 15. At the connection part 15, the header 20 and the heat transfer pipe 30 are brazed. The zinc concentration of the second anticorrosive sacrifice layer 32b on the heat transfer pipe 30 at the connection part 15 is lower than the zinc concentration of the first anticorrosive sacrifice layer 32a on the heat transfer pipe 30 located outside the header 20.SELECTED DRAWING: Figure 3
Inventors:
YAMADA KOKI
Application Number:
JP2021159051A
Publication Date:
April 10, 2023
Filing Date:
September 29, 2021
Export Citation:
Assignee:
DAIKIN IND LTD
International Classes:
F28F19/06; C23F13/02; C23F13/16; F28F9/02; F28F21/08
Domestic Patent References:
| JP2009139052A | 2009-06-25 | |||
| JP2008303405A | 2008-12-18 |
Foreign References:
| WO2015056669A1 | 2015-04-23 |
Attorney, Agent or Firm:
Patent Attorney Corporation Suncrest International Patent Office