| 摘要 |
A flat plate type heat exchanger or evaporator is disclosed for use in automobile air conditioning systems. The heat exchanger includes a set of stacked plate pairs, the plate pairs having refrigerant fluid passageways extending laterally between the plates of each plate pair while the spaces between the plate pairs define air flow passages, these air passages having fins located therein. In one aspect, fluid inlet and outlet passages are formed when differently sized tubes in adjacent plate pairs are telescoped together and subsequently brazed together to form a high surface area, fluid tight joint. The resulting fluid tight joint formed between tubes in adjacent plate pairs exhibits greater rupture resistance than that formed with drawn cup assemblies currently in use. These refrigerant fluid inlet and outlet passageways are spaced inwardly from the edges of the evaporator and extend transversely through the stack, the inlet and outlet passages being in flow communication with the lateral fluid passages located between the plates. In this way, a greater percentage of the available frontal surface area of the evaporator is utilized for heat exchange.
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