In a heat exchanger for exchanging heat between a fluid, such as a refrigerant, and air, an object is to increase the surface areas of the fins while suppressing an increase in draft resistance, so as to attain the improvement of performance. To this end, corrugated sheet fins (70) are used as the fins of a heat exchanger (60). The fins (70) are shaped in corrugated form, and the direction of their edge lines is orthogonal to the leading edge and trailing edge. In the heat exchanger (60), a plurality of corrugated sheet fins (70) are disposed at a fixed pitch axially of heat transmission pipes (61).

Heat exchanger, and air conditioner

Tanks of a first heat exchanger have plane sections perpendicular to bottoms having a plurality of tube insertion holes formed therein. Tanks of a second heat exchanger with circular cross sections have bottoms having a plurality of tube insertion holes formed therein. The axes of the tube insertion holes of the first and second heat exchangers are held in parallel with each other. The second heat exchanger is in contact with the plane sections of the first heat exchanger tank.

Integral-type heat exchanger

A motor vehicle combined heat exchanger has a tube bank linked to two manifolds and divided into an oil cooler having tubes for oil, and a condenser having tubes for a cooling fluid. The two types of tubes are different and possess respective hydraulic diameters related by the following inequality: 0.8 mm 2 ≦DHa×DHb≦3.00 mm 2 where the hydraulic diameter (DH) of a tube is defined by the formula DH=4S/P, in which S designates the area of the internal cross-section of the tube (expressed in mm 2 ) and P the internal perimeter, or “wet perimeter”, of the tube (expressed in mm).

Combined heat exchanger, particularly for a motor vehicle

A duplex heat exchanger of the so-called stacked type has in principle a plurality of plate-shaped tubular elements (1) which are stacked side by side or one on another and a plurality of fins (2) each intervening between the adjacent tubular elements. Each tubular element is composed of flat tubular segments (3a, 4a) separated from each other and each communicating with one of bulged header portions (3b, 4b) of the tubular element, so that flow paths (3, 4) for heat exchanging media are formed through each tubular element. Two or more unit heat exchangers (X, Y) are defined integral with each other within the duplex heat exchanger, since the adjacent tubular elements (1) communicate with each other through the header portions (3b, 4b).

Stacked-type duplex heat exchanger

A condenser assembly adapted to condense an evaporated refrigerant for use in a retail store refrigeration system. The condenser assembly includes at least one microchannel condenser coil including an inlet manifold and an outlet manifold. The inlet manifold includes an inlet port for receiving the refrigerant, and the outlet manifold includes an outlet port for discharging the refrigerant. The condenser assembly also includes a frame supporting the at least one microchannel condenser coil.

Microchannel condenser assembly

A duplex heat exchanger comprises unit heat exchangers which have a plurality of tubes arranged parallel with each other and comprise fins each interposed between two adjacent ones of such tubes, opposite ends of each tube being connected to a pair of headers in fluid connection therewith. The unit heat exchangers are closely juxtaposed to each other fore and aft in a direction of air flow. Coolant circuits of said unit heat exchangers are connected either in series or in parallel with each other.

Nobuaki Goh

Papers

Duplex heat exchanger