Flat-tube heat exchangers, their manufacturing processes, applications and flat-tubing for installation in the flat-tube heat exchangers.

摘要

The invention relates to a flat-tube heat exchanger, a production method suitable for producing it, and applications. Reference is made to a flat-tube heat exchanger having a plurality of flat tubes (12) whose narrow sides (50) are rounded, and having zig-zag laminated elements, which are arranged between the flat sides (14) of the flat tubes (12) and are soldered to the flat sides of the flat tubes on their edges adjacent to the flat sides. According to the invention, the longitudinal extent l of the respective rounded narrow side (50) of the respective flat tube (12) is greater than the half spacing d of the flat sides (14) of the flat tube (12), and the zig-zag laminated elements are also soldered to sections of the two rounded narrow sides (50) of the flat tube (12). In the method for producing the flat-tube heat exchanger (12) with intermediately reinforced flat tubes (12), the ends of the flat tubes (12) which are inserted into the slots of an accumulator are cut free from their intermediate reinforcement (42) and widened towards the slot circumference of the accumulator. The applications of the heat exchanger relate to use as condenser of a vehicle air-conditioning system or the cooler for engine, transmission or hydraulic oil in a motor vehicle. Flat tubes for fitting in the flat-tube heat exchanger are concatenated. …IMAGE…