Abstract: A heat exchanger assembly including a plurality of pairs of plates disposed in series for fluid flow from a pass through one pair of plates to a pass through the next pair of plates. Each pair of plates includes a central rib to define a U-shaped passage having a fluid entering leg and a fluid exiting leg interconnected by an open bottom interconnecting the legs below the lower end of the engaging ribs. A plurality of first dimples project into the passage to interact with fluid flow through the passage and each of the first dimples has an aerodynamic, e.g., tear-drop, shape to reduce whistling noise in the latter pairs of plates.

Abstract: An evaporator includes plates disposed in pairs in first and second groups, along spaced tanks. Dimples extend from the interior portions in the first group, and interior fins are disposed against the interior portions of the second group. The dimples enhance the distribution of liquid refrigerant in the passageways and the thermal energy exchange between ambient air and an upstream, low vapor quality flow of fluid passing between upstream and downstream side edges, of the first group of plates. The evaporator also eliminates the tonal noise or whistle under certain transient operating conditions.

Abstract: An integral automotive refrigerant condenser and oil cooler with a cross flow, one pass configuration has condenser and oil cooler tubes with a common total tube thickness, in spite of the substantially smaller refrigerant flow passage size. The condenser tubes have the flow passages arranged inside the tube in a novel configuration that accommodates the smaller passage size within the common thickness tube.

Abstract: An evaporator core for the climate control system of a motor vehicle formed from alternating pairs of plates. Each pair of plates includes two plates having a similar configuration engaged together and a mirrored, back-two-back relationship. Each of the plates includes at least one inlet aperture, an outlet aperture, and a return aperture. The structure of the plates and the arrangement of stacking produce an evaporator having a plurality of fluid pathways. Fluid is directed in alternating directions in adjacent pathways.

Abstract: A heat exchanger having fins disposed adjacent to each other with tubes passing through the fins to interconnect the fins. Louvers are formed in each of the fins with each louver extending at an angle with respect to the fins. An upstream portion of the interconnected fins define an incoming airflow side of the heat exchanger and a downstream portion of the interconnected fins define an outgoing airflow side of the heat exchanger. The louvers define a first bank of louvers formed in each of the upstream portions of the fins facing the incoming airflow side of the heat exchanger. The louvers also define a second bank of louvers formed in each of the downstream portions of the fins facing the incoming airflow side of the heat exchanger. Hence, all of the louvers on the fins are facing the same direction for minimizing the air pressure drop, while increasing a heat transfer between the fins, tubes, and the air flow.