Finned heat exchange pipe formed through die pressing and vacuum brazing

Abstract

The invention relates to a finned heat exchange pipe formed through die pressing and vacuum brazing. The finned heat exchange pipe is composed of base pipe fins A, base pipe fins B, heat exchange pipe runners, an inlet connecting pipe opening, an outlet connecting pipe opening and strengthening holes. The base pipe fins A and the base pipe fins B are base pipe fins the same in shape and are of a semi-range structure forming the integrated finned heat exchange pipe. The S-shaped continuous and smooth semi-range structure heat exchange pipe runners are designed inside the base pipe fins A and the base pipe fins B. Fins on the expanding surfaces of the heat exchange pipe runners are designed outside the areas of the heat exchange pipe runners. The base pipe fins A and the base pipe fins B are symmetrically distributed and are formed into the integrated finned heat exchange pipe through die pressing and vacuum brazing. The S-shaped continuous and smooth heat exchange pipe runners are combined in the integrated finned heat exchange pipe. The finned heat exchange pipe has the beneficial effects of being high in heat exchange efficiency, good in forming quality, reasonable in cost and easy to produce and has high implementation value.

Description

technical field [0001] The invention belongs to the technical field of refrigeration and air-conditioning equipment, and in particular relates to a heat exchange tube with fins formed by molding and vacuum brazing. Background technique [0002] Condensers are mainly divided into three types: air-cooled, water-cooled and air-water hybrid. The evaporative condenser uses the unsaturated evaporation of the spray water film distributed on the surface of the heat exchanger, and uses the evaporation latent heat of water to take away the heat inside the heat exchanger. The fluid has more heat, and after heat and mass exchange with the passing air, the heat is finally taken away by the air. Compared with the air-cooled type, the evaporative condenser can save more than 30% of electricity, and the water consumption is only 5% of that of the ordinary water-cooled condenser. It can be seen that the evaporative condenser has significant advantages in saving electricity and water. Food, ...

AI Technical Summary

Problems solved by technology

In the first method, the molding quality of the cavity is not uniform, and the pressure resistance is not good. In the second method, although the plate has a part of the press-formed flow channel, the entire flow channel formed by the welding seam connection is S-shaped, but it is tortuous and turns. There is no continuous smooth channel formed at the place, there is a flow heat transfer dead angle, and the flow local pressure loss is large

From the public plate-plate heat exchanger, the fluid flow channels are separated by external spot welding, which cannot guarantee the tightness of the internal flow channels, the possibility of leakage and bypass is high, the thin plate welding is easy to deform, and the forming quality is unstable. , the production cost is high, the overall strength of the large-scale plate is insufficient, and the risk of vibration and pressure failure in use cannot be ignored

[0005] CN204612221U discloses a kind of plate-tube composite heat exchanger, see figure 2 , the heat transfer plate and the heat exchange coil are immersed in a high-temperature liquid metal tank, and the two are joined together after the molten metal is cooled. This kind of heat transfer tube and the fin only fit half of the surface, and the pre-bent serpentine coil needs to Precise nesting with the heat transfer sheet and then soaking and welding, the process is more complicated

Images