Patent ID: 8776874

Claim:
A heat exchanger, comprising: a heat exchanger tube, including: a tube body having two opposed sides; a plurality of exterior flow passages defined in the tube body adjacent one of the two opposed sides; a second plurality of exterior flow passages defined in the tube body adjacent an other of the two opposed sides; a plurality of interior flow passages defined: in the tube body adjacent the plurality of exterior flow passages; and between the plurality of exterior flow passages and the second plurality of exterior flow passages; a plurality of intermediate flow passages defined in the tube body between i) the plurality of exterior flow passages and the plurality of interior flow passages and ii) the second plurality of exterior flow passages and the plurality of interior flow passages; the plurality of exterior flow passages having at least one of an average hydraulic diameter or an average width that is i) greater than at least one of an average hydraulic diameter or an average width of the interior flow passages and ii) less than twice the at least one of the average hydraulic diameter or the average width of the interior flow passages; the second plurality of exterior flow passages having at least one of an average hydraulic diameter or an average width that is i) greater than the at least one of the average hydraulic diameter or the average width of the interior flow passages and ii) less than twice the at least one of the average hydraulic diameter or the average width of the interior flow passages; and the intermediate flow passages having at least one of an average hydraulic diameter and an average width that is between the at least one of the average hydraulic diameter or the average width of the exterior flow passages and the at least one of the average hydraulic diameter or the average width of the interior flow passages; wherein each flow passage of the plurality of exterior flow passages, the second plurality of exterior flow passages, the plurality of interior flow passages, and the plurality of intermediate flow passages is to be in fluid communication with a same end tank.