A heat exchanger includes a conduit, a header, and a swirler been formed as a unitary piece by additive manufacturing. The swirler is disposed within the conduit and the header and is arranged to disperse a flow from an inlet flow path a heat exchanger matrix. The swirler extends a only portion of the length of the header between the conduit and the heat exchanger matrix and thereby provides space within the header for fluid to diffuse before entering the heat exchanger matrix.

A heat exchanger includes a conduit, a header, and a swirler been formed as a unitary piece by additive manufacturing. The swirler is disposed within the conduit and the header and is arranged to disperse a flow from an inlet flow path a heat exchanger matrix. The swirler extends a only portion of the length of the header between the conduit and the heat exchanger matrix and thereby provides space within the header for fluid to diffuse before entering the heat exchanger matrix.

The present disclosure relates to a heat exchanger for a heating, ventilating, and air conditioning (HVAC) system that includes a first slab having a first plurality of tubes extending between a first manifold and a second manifold and a second slab having a second plurality of tubes and a third plurality of tubes. The second plurality of tubes extends between a third manifold and a fourth manifold and the third plurality of tubes extends between the fourth manifold and a fifth manifold, such that the heat exchanger defines a refrigerant path sequentially through the first plurality of tubes, the second plurality of tubes, and the third plurality of tubes.

A pressure vessel includes a first container and a second container surrounding the first container and including a fluid port. The pressure vessel further includes a barrier space extending between the first container and the second container and a leak detection mechanism connected to the fluid port on the second container that is configured to detect a leak in the pressure vessel.

The present invention relates to an air conditioner. The air conditioner according to the present embodiment has a refrigeration capacity of 11 kW to 16 kW, inclusive, and uses R134a as a refrigerant circulating therein, and since a refrigerant pipe therein is made of a ductile stainless steel material having 1% or less of a delta-ferrite matrix structure with respect to the grain size area thereof, the refrigerant pipe can maintain strength and hardness as good as or better than those of a copper pipe, while also maintaining good processability.

A dual pipe includes an outer pipe having a valley/ridge portion on an outer circumferential surface thereof, and an inner pipe having a valley/ridge portion formed on an inner circumferential surface thereof and inserted into the outer pipe. In the dual pipe, the inner pipe and the outer pipe are threadedly engaged with each other. A low pressure refrigerant passes through the inner pipe. In order to secure a passage of a high pressure refrigerant in a space between the outer circumferential surface of the inner pipe and the inner circumferential surface of the outer pipe, a part of the helical valley/ridge portion formed on the outer circumferential surface of the inner pipe is composed of a multiple-helix helical valley/ridge portion.

A heat exchange tube and a heat exchanger are provided. A tube wall of the heat exchange tube includes a first wall and a second wall, a first segment of the first wall includes one of a first groove or a first protrusion, a second segment of the first wall includes one of a second groove or a second protrusion, a first segment of the second wall includes the other one of the first groove or the first protrusion, the first protrusion is arranged in the first groove, the second segment of the second wall includes the other one of the second groove or the second protrusion, and the second protrusion is arranged in the second groove. At least part of each of the first segment and the second segment of the first wall is arranged between the first segment and the second segment of the second wall.

A cooling assembly includes a body configured to be placed into thermal contact with a heat source and one or more non-planar, hermetic walls disposed within the body. The one or more non-planar hermetic walls extending around, enclosing, and defining a cooling channel configured to carry cooling fluid through the body such that the cooling fluid contacts internal surfaces of the cooling channel inside the body. The assembly including one or more enhancement structures disposed within the body and coupled with the one or more non-planar hermetic walls. The one or more enhancement structures shaped to change a flow path of the cooling fluid as the cooling fluid moves within the cooling channel and shaped to increase a surface area contacted by the cooling fluid within the cooling channel.

A cooling assembly includes a body configured to be placed into thermal contact with a heat source and one or more non-planar, hermetic walls disposed within the body. The one or more non-planar hermetic walls extending around, enclosing, and defining a cooling channel configured to carry cooling fluid through the body such that the cooling fluid contacts internal surfaces of the cooling channel inside the body. The assembly including one or more enhancement structures disposed within the body and coupled with the one or more non-planar hermetic walls. The one or more enhancement structures shaped to change a flow path of the cooling fluid as the cooling fluid moves within the cooling channel and shaped to increase a surface area contacted by the cooling fluid within the cooling channel.

A vending machine cooling system incorporating R290 or other flammable refrigerant where there is no risk of the flammable refrigerant leaking inside the vending machine and possibly being ignited, through use of an unjointed dual walled refrigerant transport structure within the evaporator assembly positioned within the interior of the vending machine.