An un-finned heat exchanger (100). The heat exchanger (100) comprises: a heat exchange tube (1), which comprises a body; a fluid channel (11) formed inside the body; and a collecting tube (2) connected to the heat exchange tube (1). Using the heat exchanger can reduce accumulation of dirt on the heat exchanger.

Heat exchanger fins and heat exchangers are disclosed. The heat exchanger fins disclosed herein comprise louvers and winglet-type vortex generators arranged to improve heat transfer efficiency.

Methods and systems are provided for a cooling module assembly for a vehicle. In one example, the cooling module assembly includes a first set of fins configured to flow a first fluid through a first sinusoidal, continuous inner passage, and a second set of fins configured to flow a second fluid through a second sinusoidal, continuous inner passage. The second set of fins shares a common plane with the first set of fins and together forms a semi-circular structure.

A liquid to refrigerant heat exchanger includes a coolant volume that is at least partially defined by a plastic housing and by a metal closure plate. The plastic housing is sealingly joined to the closure plate along an outer periphery of the closure plate. The metal closure plate can be part of a brazed assembly that defines a continuous refrigerant flow path through the heat exchanger between a refrigerant inlet port and a refrigerant outlet port.

A heat exchanger includes: a gas-side port connected to piping for a gaseous refrigerant; a liquid-side port connected to piping for a liquid refrigerant; a refrigerant path that links the gas-side port to the liquid-side port; at least four heat exchange part regions that perform heat exchange between air and the refrigerant flowing through the refrigerant path; and a branching and merging part that branches and merges the refrigerant path to connect the heat exchange part regions in series between the gas-side port and the liquid-side port through the refrigerant path. The heat exchange part regions are connected to each other through the branching and merging part so as to allow the number of refrigerant paths provided in the heat exchange part region near the gas-side port to be greater than the number of refrigerant paths provided in the heat exchange part region near the liquid-side port.

An air-over evaporative heat exchanger with multi-lobed or peanut shaped tubes replacing conventional round or elliptical tubes. The tubes have a narrow horizontal cross section and tall vertical cross section to allow the multiplication of surface area in the same coil volume while maintaining or increasing the open-air passage area. This configuration allows the coil to have an overall external heat transfer coefficient much higher than a conventional coil, while the tube shape allows the use of thinner material, reducing the weight and cost of the heat exchanger.

A heat exchanger in which a refrigerant and air flow exchange heat includes a first heat-exchanging unit. The first heat-exchanging unit includes: a first header including a first gas refrigerant inlet/outlet; a second header including a first liquid refrigerant inlet/outlet; a plurality of first flat tubes disposed side by side in a longitudinal direction of the first header and the second header; and a first communication path formation portion that is connected to the first header and the second header and that forms a first communication path.

A heat exchanger includes a tube configured to direct a working fluid therethrough. The heat exchanger also includes a fin disposed about the tube and having a louver, where the tube and the fin are made of a polymeric material.

A distributor includes a first communication flow path, a second communication flow path, and a bent portion connecting the first communication flow path and the second communication flow path. The second communication flow path includes an inner wall portion extending from the bent portion and an outer wall portion extending from the outer peripheral wall portion of the bent portion. The outer wall portion has a liquid film separation unit, which is a boundary between a relatively narrow section and a relatively wide section of the second communication flow path.

Provided is a heat exchanger that is capable of avoiding a bridge phenomenon caused by water droplets between a plurality of flat tubes and is easily manufactured. The heat exchanger includes a plurality of plate-like fins arranged in parallel at intervals, the plurality of flat tubes inserted into the plurality of plate-like fins, and at least one water-guiding member arranged between adjacent ones of the plurality of flat tubes projecting from at least one of both outermost ones of the plurality of plate-like fins and having both end portions held in contact with projecting flat surfaces of the adjacent ones of the plurality of flat tubes.