Heat exchanger, method for manufacturing the same, and heat exchanging tube

A technology of heat exchanger and thermal spraying, which is applied in the field of heat exchanger tubes, can solve problems such as difficult to use manufacturing methods, and achieve the effect of improving corrosion resistance and preventing fins from detaching

Inactive Publication Date: 2007-02-14
SHOWA DENKO KK
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is practically diffic

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Heat exchanger, method for manufacturing the same, and heat exchanging tube
  • Heat exchanger, method for manufacturing the same, and heat exchanging tube
  • Heat exchanger, method for manufacturing the same, and heat exchanging tube

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0087] Using an extruded material made of aluminum alloy (0.4wt% copper-0.15wt% manganese-the rest is aluminium), an extruder with a width of 16mm, a height of 3mm and a wall thickness of 0.5mm can be extruded Flat perforated tube. On the other hand, above and below the exit of the extruder, thermal spray guns of an arc sprayer are installed to thermally spray zinc onto the upper and lower surfaces of the extruded tube to form a zinc thermal spray coating.

[0088] At this time, as shown in Table 1, the zinc adhesion amount in the zinc thermal spraying treatment was adjusted to 6g / cm 2 , and the area ratio to the entire tube surface was adjusted to 60%. Subsequently, the zinc thermal sprayed pipe 2 was subjected to zinc diffusion treatment of the zinc thermal sprayed layer in a nitrogen atmosphere furnace under heating conditions of 480° C.×2 hours. Thus, the zinc diffusion layer 20 is formed.

[0089] Use these tubes 20 to temporarily assemble into the multi-flow heat exch...

example 2

[0111] As shown in Table 1, the adhesion achieved by zinc thermal spraying treatment is set to 7g / cm 2 , and the area ratio is set to 65%. Diffusion treatment and brazing treatment were performed in the same manner as described above, and the zinc concentration of the surface between the fins and the maximum zinc concentration of the fillet eutectic portion were measured, and the same test was performed.

example 3

[0113] As shown in Table 1, the adhesion achieved by zinc thermal spraying treatment is set to 8g / cm 2 , and the area ratio is set to 70%. Diffusion treatment and brazing treatment were performed in the same manner as described above, and the zinc concentration of the surface between the fins and the maximum zinc concentration of the fillet eutectic portion were measured, and the same test was performed.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Adhesionaaaaaaaaaa
Depthaaaaaaaaaa
Depthaaaaaaaaaa
Login to view more

Abstract

The present invention is directed to a method for manufacturing a heat exchanger in which a Zn thermally sprayed layer is formed on a surface of an aluminum flat tube 2 and then the Zn thermally sprayed tube is combined with an aluminum corrugated fin and brazed to the fin. The Zn thermally sprayed tube 2 is subjected to a Zn diffusion treatment by heating the tube before the brazing to diffuse the Zn in the tube surface, and thereafter the brazing is performed. The heat exchanger manufactured in this way can assuredly have a stable sacrifice corrosion layer and is excellent in corrosion resistance. The heat exchanger can be manufactured efficiently without major facility changes at low cost.

Description

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Owner SHOWA DENKO KK
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2023 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap