Patent ID: 6892803

Claim:
A heat exchanger, comprising: refrigerant inlet and outlet header portions; at least a first serpentine multiport tube defining a plurality of tube runs with a tube bend between adjacent tube runs, said first tube having: an inlet end on one tube run for receiving refrigerant from said refrigerant inlet header portion, and an outlet end on another tube run for discharging refrigerant into said refrigerant outlet header portion; a second serpentine multiport tube defining a second plurality of tube runs with a tube bend between adjacent tube runs, said second tube being generally aligned with and behind said first tube and having: an inlet end on one tube run for receiving refrigerant from said refrigerant inlet header portion, and an outlet end on another tube run for discharging refrigerant into said refrigerant outlet header portion; a fluid heat exchanger inlet and a fluid heat exchanger outlet; at least three plate assembly fluid paths each including a pair of spaced plates secured together at their edges to define an enclosed space with a fluid inlet to said one side of said space and a fluid outlet from said other side of said space, wherein the fluid inlet of a first of said plate assembly fluid paths receives fluid from said fluid heat exchanger inlet, and one plate of said first of said plate assembly fluid paths is positioned against said one tube run of said first tube and is positioned against said one tube run of said second tube, the fluid outlet of a second of said plate assembly fluid paths discharges fluid to said fluid heat exchanger outlet, and one plate of said second of said plate assembly fluid paths is positioned against said another tube run of said first tube and is positioned against said another tube run of said first tube, and a third of said plate assembly fluid paths is positioned between said tube runs of said first tube and is positioned between said tube runs of said second tube.