A heat exchanger for an air conditioner for which a zeotropic refrigerant mixture is used is obtained, and the heat exchanger, when used as an evaporator, enables reduction of the amount of required refrigerant without deteriorating the heat transfer performance. The heat exchanger includes: a plurality of fins stacked together at predetermined intervals therebetween; first heat transfer pipes which extend through the plurality of fins, in which a heat medium flows, and which have a plurality of grooves in the inner surface of the pipes; and second heat transfer pipes extending through the plurality of fins, having one end connected to one end of the first heat transfer pipes to form one heat medium flow path, being smaller in pipe diameter than the first heat transfer pipes, and having an inner surface shape providing a pressure loss per unit length smaller than that of the first heat transfer pipes.

A liquid cooling jacket includes a refrigerant flow path which is a flow path having a width in a second direction and in which a heat dissipation assembly is located on a first side in a third direction, where a direction in which a refrigerant flows is defined as a first direction. The refrigerant flow path includes a narrow flow path portion. A width in the third direction of the narrow flow path portion is smaller than a width in the third direction of a flow path on a first side in the first direction with respect to the narrow flow path portion and a width in the third direction of a flow path on a second side in the first direction with respect to the narrow flow path portion.

A liquid cooling jacket includes a refrigerant flow path which is a flow path having a width in a second direction and in which a heat dissipation assembly is located on a first side in a third direction, where a direction in which a refrigerant flows is defined as a first direction. The refrigerant flow path includes a narrow flow path portion. A width in the third direction of the narrow flow path portion is smaller than a width in the third direction of a flow path on a first side in the first direction with respect to the narrow flow path portion and a width in the third direction of a flow path on a second side in the first direction with respect to the narrow flow path portion.

The invention relates to a heat exchanger for transferring heat between two fluids with different temperature, said heat exchanger comprises a first heat exchange element (10, 11), said first heat exchange element (10, 11) having at least one core (20, 21) extending longitudinally through the heat exchange element, said at least one core (20, 21) defining a core cavity, said cavity being configured with an inlet port 22a and an outlet port 22b to receive a first fluid flowing there through, said heat exchange element (10, 11) having ribs (30) extending continuously substantially in parallel with the at least one core (20, 21) along the whole length of said core (20, 21), said ribs (30) extending radially outwardly from the core (20, 21) and being exposed to contact with a second fluid, flowing along said ribs (30). The invention being distinctive in that each said rib (30, 31) is divided into at least two radially extending fins (33, 34, 35, 36) at a radial distance from the core (20, 21), each said fin (33, 34, 35, 36) extends to a proximity of an outer casing surrounding said first heat exchanger element (10, 11) or a proximity of fins (33,34, 35, 36) of an additional heat exchanger element (10, 11), said additional heat exchanger element (10, 11) being arranged adjacent to said first heat exchanger element (10, 11), said inlet port (22a) and said outlet port (22b) being coupled to said core (20, 21) at the same end of the core (20a, 21a)

The invention relates to a heat exchanger unit for an exhaust gas system. The heat exchanger unit comprises an inlet for a fluid flow to enter the heat exchanger unit and an outlet for a fluid flow to exit the heat exchanger unit. The heat exchanger unit comprises a heat exchanger having a heat exchanger conduit passing through the heat exchanger and at least one bypass conduit bypassing the heat exchanger, wherein the at least one bypass conduit comprises a bypass core having a plurality of channels arranged longitudinally along the bypass conduit.

A heat exchange conduit includes a body having a first portion including a first flow channel and a second portion including a second flow channel. A cross-section of the heat exchange conduit varies over a length of the heat exchange conduit.

A heat exchange conduit includes a body having a first portion including a first flow channel and a second portion including a second flow channel. A cross-section of the heat exchange conduit varies over a length of the heat exchange conduit.

A heat exchanger with a chamber assembly, having a medium directing assembly disposed within. The medium directing assembly provided with a first and a second medium directing panel member, each respectively a planar panel member having a first side and a second side. A heat exchange medium introduced into the chamber assembly in an initial line of flow is vertically diverted into two flows to impact the first side of the first and the second medium directing panel member separately. Each diverted heat exchange medium is then further diverted into a pair of divergent arcuate lateral flow, wherein each lateral flow is directed to impact the lateral sides of the chamber assembly. On the respective second sides of the first and the second medium directing panel member, laterally diverted heat exchange medium is directed to collide into each other, where the pair of laterally diverted flows are subsequently merged.

A heat exchanger with a chamber assembly, having a medium directing assembly disposed within. The medium directing assembly provided with a first and a second medium directing panel member, each respectively a planar panel member having a first side and a second side. A heat exchange medium introduced into the chamber assembly in an initial line of flow is vertically diverted into two flows to impact the first side of the first and the second medium directing panel member separately. Each diverted heat exchange medium is then further diverted into a pair of divergent arcuate lateral flow, wherein each lateral flow is directed to impact the lateral sides of the chamber assembly. On the respective second sides of the first and the second medium directing panel member, laterally diverted heat exchange medium is directed to collide into each other, where the pair of laterally diverted flows are subsequently merged.

Heat exchangers include at least one looped tube having at least one section that is laterally offset from another section of the looped tube. Fluid cooling systems and seal systems may include such heat exchangers.