Aluminum brazed sheet coils for evaporator fins
Aluminum brazed sheet coil is a special composite aluminum material made by combining an aluminum alloy base material with an aluminum brazing alloy cladding. It is usually supplied in coil form for easy mass production and processing. Aluminum brazed coils have high thermal conductivity and corrosion resistance and are widely used in heat exchangers such as evaporators and condensers in automobiles, air conditioners, and refrigeration equipment.
4045/3003/4045 aluminum brazed plate is a common brazed composite material used as a typical choice for evaporator fins. This material efficiently transfers heat to the evaporator fins, accelerating heat dissipation. The fins are made up of multiple lamellae that are closely stacked and have a large surface area, thereby significantly improving heat transfer efficiency. The use of aluminum brazed composite plates not only ensures the durability of the evaporator fins during operation, but also provides reliable heat transfer performance.
Introduction to the structure of aluminum brazing sheet coils:
Base material: 3xxx series aluminum alloy (such as 3003, 3005, etc.) is often used because it has good thermal conductivity, corrosion resistance and formability. The base material primarily provides the strength and durability of the material.
Brazing coating: Usually 4xxx series aluminum alloys (such as 4045, 4343, etc.) are used, which have high silicon content, low melting point, and good fluidity and wettability. This layer melts when heated and welds to the substrate and other components, acting as a bond to form a strong joint.
The composite structure of 4045/3003/4045 aluminum brazing plate combines the advantages of the brazing layer and the base material, which not only ensures good thermal conductivity, but also improves the brazing performance and durability of the material. During the manufacturing process, the 4045 outer layer melts during the brazing process, firmly connecting the 3003 base material to other components. This structural design is ideal for manufacturing components such as evaporator fins that require efficient heat dissipation and good corrosion resistance.
Performance index of evaporator board material
Alloy | Temper | Thickness(mm) | Tolerance(mm) | Clad rate(%) | Mechanical property | ||
Tensile Strength (MPa) | Yield Strength (MPa) | Elongation Min.(%) | |||||
4045/3003/4045 | O | 0.8~1.2 | ±0.03 | 8-12 | 100-150 | ≥45 | 27 |
Performance characteristics of aluminum brazed coils for evaporator fins:
1. Good thermal conductivity: Aluminum has a high thermal conductivity, which improves the heat exchange efficiency of the evaporator.
2. Corrosion resistance: An oxide film can be formed on the surface of aluminum to enhance corrosion resistance, and is often coated or alloyed.
3. Good weldability: The brazing plate and tape are specially processed to ensure efficient welding between components and prevent refrigerant leakage.
4. Light weight: Aluminum has low density, reducing system weight, saving energy, and reducing equipment load.
5. Processability: Aluminum brazed plate and coil strips have good plasticity and are easy to be processed into fins of various shapes and sizes.
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