A swage mechanism operable to expand an inner diameter of tubing including a housing defining a longitudinal axis, and a plurality of jaws coupled to the housing and movable radially outward relative to the longitudinal axis for selectively gripping an interior of the tubing. The jaws each include a first cam surface. The swage mechanism further includes a ram having a cylindrical portion and a frusto-conical head portion, and an arbor that is coupled to the housing and having a second cam surface. The frusto-conical head portion of the ram is insertable into the tubing to expand the inner diameter of the tubing. The second cam surface of the arbor is engageable with the first cam surface of each of the jaws to move the jaws toward or away from the longitudinal axis, wherein the second cam surface moves in a direction along the longitudinal axis.

An electromagnetic forming method includes: a step of setting pipe periphery members at plural positions along an axial direction of a pipe material; a step of setting a coil unit on a side of one end, in the axial direction, of the pipe material, the coil unit including a conductor wound portion, conductor extension portions, and a resin-made conductor support portion; a step of setting a support member on a side of the other end, in the axial direction, of the pipe material; a coil unit holding step; a coil setting step; and a swaging step. The coil setting step and the swaging step are performed in this order at each of the plural positions of the pipe material while the coil unit is kept held by the support member.

An electromagnetic forming method includes: a step of setting pipe periphery members at plural positions along an axial direction of a pipe material; a step of setting a coil unit on a side of one end, in the axial direction, of the pipe material, the coil unit including a conductor wound portion, conductor extension portions, and a resin-made conductor support portion; a step of setting a support member on a side of the other end, in the axial direction, of the pipe material; a coil unit holding step; a coil setting step; and a swaging step. The coil setting step and the swaging step are performed in this order at each of the plural positions of the pipe material while the coil unit is kept held by the support member.

A system for controlling tubing member assembly diameter includes a control unit, a computing device, a tubing member assembly, and an elastomer member. The tubing member assembly includes an outer pipe member that defines a static diameter and an inner pipe member having an outer surface and defining a dynamic diameter that changes from a first inner pipe member value to a second inner pipe member value. The elastomer member is disposed between the outer pipe member and the inner pipe member such that an inner area of the elastomer member is disposed on the outer surface of the inner pipe member. The elastomer member expands from a first position to a second position to constrict the dynamic diameter from the first inner pipe member value to the second inner pipe member value responsive to receiving an electrical signal from the control unit.

A system for controlling tubing member assembly diameter includes a control unit, a computing device, a tubing member assembly, and an elastomer member. The tubing member assembly includes an outer pipe member that defines a static diameter and an inner pipe member having an outer surface and defining a dynamic diameter that changes from a first inner pipe member value to a second inner pipe member value. The elastomer member is disposed between the outer pipe member and the inner pipe member such that an inner area of the elastomer member is disposed on the outer surface of the inner pipe member. The elastomer member expands from a first position to a second position to constrict the dynamic diameter from the first inner pipe member value to the second inner pipe member value responsive to receiving an electrical signal from the control unit.

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.

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.

A system for controlling tubing member assembly diameter includes a control unit, a computing device, a tubing member assembly, and an elastomer member. The tubing member assembly includes an outer pipe member that defines a static diameter and an inner pipe member having an outer surface and defining a dynamic diameter that changes from a first inner pipe member value to a second inner pipe member value. The elastomer member is disposed between the outer pipe member and the inner pipe member such that an inner area of the elastomer member is disposed on the outer surface of the inner pipe member. The elastomer member expands from a first position to a second position to constrict the dynamic diameter from the first inner pipe member value to the second inner pipe member value responsive to receiving an electrical signal from the control unit.

A system for controlling tubing member assembly diameter includes a control unit, a computing device, a tubing member assembly, and an elastomer member. The tubing member assembly includes an outer pipe member that defines a static diameter and an inner pipe member having an outer surface and defining a dynamic diameter that changes from a first inner pipe member value to a second inner pipe member value. The elastomer member is disposed between the outer pipe member and the inner pipe member such that an inner area of the elastomer member is disposed on the outer surface of the inner pipe member. The elastomer member expands from a first position to a second position to constrict the dynamic diameter from the first inner pipe member value to the second inner pipe member value responsive to receiving an electrical signal from the control unit.

The present invention discloses a method for preparing an evaporator for reducing water condensing capacity and an evaporator. The preparation method comprises steps of: step A: selecting fins; step B: stacking; step C: arranging tubes; and, step D: expanding tubes. In accordance with the present invention, the existing fins and devices can be used to produce an evaporator in which the distance between two adjacent fins satisfies the requirements of the freezing operation, ensuring the normal operation of an air conditioner when the refrigeration temperature is below 0° C.