Cooled exhaust pipe is a used evaporator cooling air. Widely used in a low temperature refrigerator, the refrigerant flows in the discharge tube was cooled and evaporated, the outer tube as a heat transfer medium is cooling air for natural convection. The biggest advantage cooled exhaust pipe is simple in structure, easy to manufacture, consume less dry storage within the warehouse due to non-packaged foods. However, the heat transfer coefficient is lower row of tubes, and the operation difficult cold evaporator, defrost, is not conducive to automation. For direct ammonia cooling systems seamless welded, using a light pipe or coiled finned tube; Freon system for temperature and humidity unit evaporator, mostly using around the chip or set piece brass finned tube group. The main difference lies in the dry evaporator freon refrigerant flow in the pipe, and the refrigerant contained in the tube flow. After throttling the liquid Freon from the lower side of the end cap into the evaporator, after several processes leads from the upper end cap, the refrigerant flows in the pipe with the continuous evaporation, as a part of the wall so that steam occupied, and therefore It's as effective as heat flooded. But no evaporation temperature of the liquid column evaporator influence brass, and higher flow rates due freon (≥4m / s), the oil return is better. In addition evaporator, since the outer tube is filled with a large number of secondary refrigerant, thereby slowing the risk of frost. The amount of such charge within the evaporator refrigerant just flooded the 1/2 ~ l / 3 or less, it is called "dry evaporator." Copper tube evaporator | Evaporator | Evaporator Watson by Texas air-conditioning plant. Texas Watson conditioning plant (www.wchuaxin.com) (www.wchuaxin.com) strong, credible, Shandong Texas heat, refrigeration and air conditioning equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Watson into the brilliant air conditioning and you work for a better future!