| 摘要 |
A heat exchanger including inlet and outlet header (72, 76) portions for a refrigerant (such as CO2), serpentine multiport tubes (62) each with a plurality of aligned tube runs (64, 66), and at least three plate assembly (84, 86, 88, 90) fluid paths. Each plate assembly (84, 86, 88, 90) fluid pat h includes a pair of spaced plates secured together at their edges to define a n enclosed space with a fluid inlet and fluid outlet on opposite sides of the space. One plate of one fluid path (84) is positioned against first aligned tube runs (64, 66), one plate of a second (90) of the fluid paths (84, 86, 8 8, 90) is positioned against second aligned tube runs (64, 66), and third fluid path (86, 88) is positioned between the first and second aligned tube runs (64, 66). The plates may be substantially identical to one another.
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