A heat exchanger includes a plurality of heat transfer tubes housed in a predetermined case, a connecting tube body for connecting the plurality of heat transfer tubes, a predetermined tube expansion portion provided on each heat transfer tube, a first peripheral wall portion provided on the tube expansion portion, and a second peripheral wall portion that is positioned on an end portion of the connecting tube body and fitted to the tube expansion portion, wherein the first and second peripheral wall portions have different sectional shapes and are fitted together in a partial contact state including predetermined contact and non-contact portions. According to this configuration, the heat transfer tubes can be fixed to a side wall portion of the case and the connecting tube body can be connected to the heat transfer tubes easily and appropriately.

An intermediate product for the production of a surface heat exchanger, in particular for building room air conditioning, including a support plate, on one side of which a tube system for conducting a medium is attached and on the other side of which a prefabricated adhesive tape having a manually removable outer protective layer is arranged, wherein the adhesive tape is free of any support.

A heat exchanger includes a header, a tank and a gasket between the header and the tank. The gasket at least includes one portion protruding from the header, which is in sealing engagement with a portion of the tank. In some embodiments, the portion protruding from the header may include a V-shaped or U-shaped groove that is open to the portion of the tank.

A method and system are described for a refrigerant distributor, and for attaching the distributor tubes to an evaporator coil. A short tube can inserted into the bell end of a tube and the hell end can be crimped around the short tube to lock it into place. The short tube preferably has a bead or widened shaft around which to crimp the bell. The disclosure is particularly beneficial for aluminum based components because aluminum is more susceptible to blockages or leaking due to problems from brazing.

In a tank structure of a heat exchanger having a narrow width header plate, to reduce thermal stress generated in a tube on the outermost side of the header plate in a lengthwise direction. Insertion holes, except for end-portion tube insertion holes at least located at end portions of a header plate in the lengthwise direction, are linked with deformation prevention beads formed along the lengthwise direction of the header plate, and the end-portion tube insertion holes are not linked with the deformation prevention beads.

Heat exchangers and methods for assembling a heat exchanger are described, such as for example a round tube heat exchanger, which may be a fin and tube heat exchanger, and which may be used for example in a heating, ventilation, and air conditioning system (HVAC) system and/or unit thereof. The heat exchanger includes aluminum tubes mechanically rolled into an aluminum tube support and the tubes are fluidically sealed with the tube support. The aluminum tube support including the aluminum tubes rolled therein is assembled to a fluid manifold configured to allow fluid flow through the heat exchanger and into and/or out of the heat exchanger.

Heat exchangers and methods for assembling a heat exchanger are described, such as for example a round tube heat exchanger, which may be a fin and tube heat exchanger, and which may be used for example in a heating, ventilation, and air conditioning system (HVAC) system and/or unit thereof. The heat exchanger includes aluminum tubes mechanically rolled into an aluminum tube support and the tubes are fluidically sealed with the tube support. The aluminum tube support including the aluminum tubes rolled therein is assembled to a fluid manifold configured to allow fluid flow through the heat exchanger and into and/or out of the heat exchanger.

A heat exchanger, that connects to a first pipe through which a refrigerant flows, includes: heat transfer tubes extending in a first direction; and a header connected to the heat transfer tubes. The header includes: a first member including a first portion connected to the heat transfer tubes; and a second member disposed between the first pipe and the first portion. The second member includes: a first wall and a second wall that each extend in the first direction; and a coupling portion that couples the first wall to the second wall. The first pipe communicates with each heat transfer tube through a space delimited by the first wall and the second wall.

A heat exchanger includes: a header; and heat transfer tubes connected to the header. The header includes a first member, a second member, and a third member. A brazing layer between the second member and the third member has a melt rate, at predetermined temperature, that is larger than a melt rate, at the predetermined temperature, of at least one of: a brazing layer between the first member and the second member; and a brazing layer between the first member and the third member.

An intermediate product for the production of a surface heat exchanger, in particular for building room air conditioning, including a support plate, on one side of which a tube system for conducting a medium is attached and on the other side of which a prefabricated adhesive tape having a manually removable outer protective layer is arranged, wherein the adhesive tape is free of any support.