A heat exchanger includes an inlet tank (10a) connected to and in fluid communication with an inlet pipe (12a) for ingress of a coolant therein, an outlet tank (10b) connected to and in fluid communication with an outlet pipe (12b) for egress of coolant there from. The heat exchanger further includes heat exchange tubes (20) and a tubular element (30) to configure fluid communication between the inlet tank (10a) and the outlet tank (10b). A first side of the outlet tank (10b) is complimentary to and connected to the outlet pipe (12b) and an opposite second side of the outlet tank (10b) is complimentary to and aligned with the tubular element (30). The tubular element (30) and the outlet pipe (12b) are of different cross sections, wherein shape of the outlet tank (10b) transforms smoothly between those cross sections along fluid path.

This heat exchanger is equipped with: a first heat exchange unit having a first inlet/outlet unit which has one inlet/outlet port and through which a coolant flows, and also having a plurality of first heat transfer pipes, each of which has one end thereof connected to the first inlet/outlet unit; a header pipe which is connected to the other ends of the plurality of first heat transfer pipes; and a second heat exchange unit having a second inlet/outlet unit which has two or more inlet/outlet ports and through which a coolant flows, and also having a plurality of second heat transfer pipes, each of which has one end thereof connected to the header pipe and the other end thereof connected to the second inlet/outlet unit. The coolant flows from the first heat exchange unit side toward the second heat exchange unit side during heating and flows from the second heat exchange unit side toward the first heat exchange unit side during cooling. In addition, the second heat exchange unit has a larger heat exchange surface area, which is the surface area across which heat exchange between the coolant and air occurs, than does the first heat exchange unit.

A vapor/liquid condensation system includes a condensation unit and an evaporation unit. The condensation unit is connected with the evaporation unit via conduits. The evaporation unit has a liquid inlet, a vapor outlet and an evaporation chamber in communication with each other. The evaporation unit converts liquid-phase working fluid into vapor-phase working fluid, which spreads to the condensation unit. The condensation unit cools and condenses the vapor-phase working fluid into liquid-phase working fluid, which goes back the evaporation unit. After the vapor-phase working fluid enters the condensation unit, the vapor-phase working fluid is distributed and condensed into liquid-phase working fluid. Then the liquid-phase working fluid is collected and then goes back to the evaporation unit. The length of the pipeline is shortened and the pipeline pressure is lowered to avoid interruption of heat dissipation circulation and failure in heat dissipation.

A vapor/liquid condensation system includes a condensation unit and an evaporation unit. The condensation unit is connected with the evaporation unit via conduits. The evaporation unit has a liquid inlet, a vapor outlet and an evaporation chamber in communication with each other. The evaporation unit converts liquid-phase working fluid into vapor-phase working fluid, which spreads to the condensation unit. The condensation unit cools and condenses the vapor-phase working fluid into liquid-phase working fluid, which goes back the evaporation unit. After the vapor-phase working fluid enters the condensation unit, the vapor-phase working fluid is distributed and condensed into liquid-phase working fluid. Then the liquid-phase working fluid is collected and then goes back to the evaporation unit. The length of the pipeline is shortened and the pipeline pressure is lowered to avoid interruption of heat dissipation circulation and failure in heat dissipation.

A vapor/liquid condensation system includes a condensation unit and an evaporation unit. The condensation unit is connected with the evaporation unit via conduits. The evaporation unit has a liquid inlet, a vapor outlet and an evaporation chamber in communication with each other. The evaporation unit converts liquid-phase working fluid into vapor-phase working fluid, which spreads to the condensation unit. The condensation unit cools and condenses the vapor-phase working fluid into liquid-phase working fluid, which goes back the evaporation unit. After the vapor-phase working fluid enters the condensation unit, the vapor-phase working fluid is distributed and condensed into liquid-phase working fluid. Then the liquid-phase working fluid is collected and then goes back to the evaporation unit. The length of the pipeline is shortened and the pipeline pressure is lowered to avoid interruption of heat dissipation circulation and failure in heat dissipation.

An air-conditioner outdoor heat exchanger has a fin, multiple heat transfer pipes thermally connected to the fin, having a flat sectional shape, and configured such that refrigerant flows through header pipes connected to inlet and outlet sides of the heat transfer pipes. The refrigerant flows through the heat transfer pipes in parallel, and when the refrigerant returns from the outlet-side header pipe to the inlet-side header pipe through the heat transfer pipes, the refrigerant returns to the inlet-side header pipe through one of the heat transfer pipes adjacent to another one of the heat transfer pipes through which the refrigerant has flowed when flowing from the inlet-side header pipe to the outlet-side header pipe. At least two systems of refrigerant paths are formed, and the refrigerant flows back and forth in each system between the inlet-side header pipe and the outlet-side header pipe.

Disclosed are a header assembly (100) for a heat exchanger and a heat exchanger having the header assembly (100). The header assembly (100) includes: an outer tube (1), the outer tube (1) having a tube wall (11); an inner tube (2), the inner tube (2) being provided in the outer tube (1) and having a tube wall (21) and a through hole (22) penetrating through the tube wall (21) of the inner tube (2), and a cavity (30) being formed between the outer tube (1) and the inner tube (2); and an opening (12) formed in the tube wall (11) a of the outer tube (1) and used for communicating the cavity (30) between the outer tube (1) and the inner tube (2) with a heat exchange g tube. The header assembly (100) and the heat exchanger having the header assembly (100) can improve heat exchange efficiency.

A heat exchanger includes: heat transfer tubes disposed along a predetermined direction; and a header that retains longitudinal ends of the heat transfer tubes. The header includes: a first member including a main wall portion that has through holes through which the longitudinal ends respectively pass; a second member defining insertion spaces that communicate with the heat transfer tubes at the longitudinal ends; and a third member facing the longitudinal ends. The second member includes: a pair of side plates disposed in a width direction of the header and that define the insertion spaces therebetween; and a partition plate connected to the pair of side plates and that separates adjacent ones of the insertion spaces.

A plate heat exchanger arrangement (1), which comprises a plate pack (2) and an outer casing surrounding the plate pack. At least one partition plate (5) is arranged between the heat exchange plates of the plate pack, which divides the plate pack to the separate plate pack parts, wherein the plate heat exchanger arrangement comprises an inlet connection and an outlet connection for each plate pack part, which are arranged in connection with the inner parts of the plate pairs of said plate pack part. At least one inlet or outlet connection of the plate pack parts comprises a connection pipe (8), which is arranged inside a flow passage (10b) of the plate pack part between the end plate of the outer casing and the partition plate (5), wherein an end of said connection pipe is attached to said partition plate (5) for forming a connection to the flow passage of said plate pack part and a second end of said connection pipe (8) elongates through an end plate (4a) of the outer casing.

A heat exchanger includes: tubes stacked in a stacking direction, through which fluid flows; and a tank having a core plate to which each of the tubes is connected. The tank has a first space and a second space separated from each other and arranged in the stacking direction to store fluid. The core plate has insertion holes arranged in the stacking direction, through which the tubes are respectively inserted. The core plate has a boundary portion opposing a boundary between the first space and the second space. The core plate has a rigid portion that overlaps at least one of the insertion holes at a position adjacent to the boundary portion so as to increase a rigidity of the core plate.