Air cooler: a surface heat exchange device that uses cold water and ethylene glycol solution as the medium to indirectly cool the air with equal humidity or dehumidification.

Appearance requirements of air cooler:

1. The fins of the air cooler should be in close contact with the base pipe.

2. The surface of the ferrous metal parts used in the air cooler should be treated with anti-rust treatment.

3. The outer surface of the air cooler should be clean and free of oil stains.

4. The fins of the air cooler should be neat, evenly spaced, without curling, cracks, burrs, etc. There should be no obvious collision damage.

5. There should be no cracks on the flanging of the punched hole of the air cooler.

6. The weld seam of the air cooler should be firm, smooth, and free from defects such as overburning, cracks, and pores.

7. The elbow of the air cooler should have no obvious wrinkles and deformation.

8. After the heat exchange tube is dip-coated by thermal method, its coating should be uniform and smooth.