专利名称：Flat tube heat exchanger, method of making
the same and flat tubes for the heatexchanger
发明人：Roland Haussmann申请号：US07/902230申请日：19920622公开号：US05251692A公开日：19931012
摘要：A flat tube heat exchanger includes headers (4) and a number of flat tubes (12)between the headers (4), the flat tubes (12) having flat sides (14) and short sides (50) thatare rounded. The flat tubes (12) also have internal reinforcing ribs (42). The heat
exchanger also includes zigzag fins disposed between the flat sides (14) of the flat tubes(12), the fins being soldered to the flat tubes. The longitudinal extent (1) of a roundedshort side (50) of a flat tube (12) is greater than half the distance d between the flat sides(14) of the flat tube (12) . Furthermore, the zigzag fins (16) are soldered to portions (58)of both rounded short sides (50) of the flat tube (12). In the process for producing theflat tube heat exchanger (12), the ends of the flat tubes (12) are inserted into slits (8) of aheader (4) and are cut free from their reinforcement ribs (42). The ends of the flat tubes(12) are then expanded against the rims of the slits (8) in the header (4). The heatexchanger can be used as a condenser in a vehicle air conditioner, or as a cooler for anengine or transmission or hydraulic oil in a motor vehicle. Flat tubes for installation in theflat tube heat exchanger can be linked together when they are made to facilitatetransportation and handling.
申请人：THERMAL-WERKE WAERME-, KAELTE-, KLIMATECHNIK GMBH
代理机构：Spencer, Frank & Schneider
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