Bonding Technology
Bonding Collector structure：
There are three common types of flat-plate solar collector heat-absorbing body structures: laser welding, ultrasonic welding, and copper-aluminum composite. The following will discuss the process characteristics, application, process realization, heat conduction area, use range, coating and new development. Compare the structure of the BONGDING endothermic.
Comparison of several common heat structures:
Absorber Connection type | Laser welding | Ultrasonic welding | Copper and aluminum composite | Bonding |
Application | Aluminum sheet + copper tube | Aluminum sheet + copper tube | Aluminum sheet + copper tube | Aluminum sheet + copper tube |
Material thickness | 0.3-0.4mm | Copper 0.12-0.2mm, Aluminum 0.3mm | 0.4mm | 0.7mm |
Tube plate contact shape | Point + line | Banding | 4 arc belts | 360° arc |
Tube sheet contact type | Formation of molten pool | 20khz axial vibration rolling | Mechanical extrusion | Bonding craft |
Deformation | Absorber slightly deformed | Rolling belt thinning | Plastic deformation | Elastic deformation |
Heat conduction area | Smaller | Larger | Larger | Larger |
Heat-absorbing coating | Blue film/black film | Blue film/black film | Anodizing | Blue film |
Appearance | Slightly visible | Expose 3mm substrate | Semicircle | Micro arc + sector angle |
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Analysis of the contact angle of the copper-aluminum composite heat sink structure:
