Novel evaporimeter heat exchanger tube bundles

The utility model provides a novel evaporimeter heat exchanger tube bundles, includes heat exchange coil, buffer tube, entry liquid nitrogen header and export liquid nitrogen header, heat exchange coil include the parent tube with and a plurality of fins of external fixation, the parent tube directly bends to many circuitous U type coil pipes by whole root canal, the heat exchange coil entrance point connects gradually buffer tube, entry liquid nitrogen header, export liquid nitrogen header is connected to the heat exchange coil exit end. The utility model discloses TP304L seamless steel pipe, middle nothing butt joint welded joint, straight tube section high -frequency soldering fin are selected for use to the coil pipe material. Set tubular structure is adopted in the tube bank, and the minimize solder joint reduces to reveal the probability, and this compact structure is simple, the production of being convenient for, and occupation space is little, vibrate for a short time, and the heat transfer is effect