Abstract: A method of controlling the performance of a refrigeration system includes operating first and second heat exchangers, the first to remove heat from one or both of a space where the first heat exchanger is disposed or a component within the space where the first heat exchanger is disposed. The first heat exchanger has a first set of parallel tubes between manifolds, the second heat exchanger has a second set of parallel tubes between manifolds the first and second tubes alternating in spaces between each other; Refrigerant that flows through the first set of tubes additionally flows through the second set of tubes before the refrigerant again flows through the first set of tubes. Operating a second heat exchanger that is fluidly connected with both of the first set of tubes and the second set of tubes.

Abstract: A heat exchange system for controlling heat within an indoor space is provided. The system includes a heat exchanger located within the indoor space and a dual flow heat exchanger that is located in a space that is not temperature regulated by the system. The outdoor dual flow heat exchanger has flow through two different pluralities of parallel tubes that are interspersed between each other. The system includes a first expansion valve located within the indoor space to receive flow from one of the two sets of parallel tubes and cause flow to the indoor heat exchanger. The system includes a second expansion valve located in the non-temperature regulated space, wherein the second expansion valve receives flow from the second set of tubes and returns expanded lower pressure flow to the first set of tubes.

Abstract: A fin device for a heat exchanger is provided. The device includes a first elongated strip of material, and a second elongated strip of material, the first and second elongated strips of material extend in parallel to each other, and are disposed adjacent to each other, wherein a longitudinal axis extends parallel to both the first elongated strip of material and the second elongated strip of material.

Abstract: A spacer device for incorporation into a bent-tube heat exchanger that includes a spine and a plurality of fingers that protrude from one side of the spine. The number of fingers in the spacer device is less than the number of tubes that are folded in a region to form the bent-tube heat exchanger. The plurality of fingers are configured to exert a force against the tubes and to provide and maintain a separation between the tubes in the folded region. A heat exchanger that includes the spacer device may also include a coating on the tubes in the folded region in order to reduce corrosion and increase the life-time of the heat exchanger. The method of forming the heat exchanger includes placing the spacer device between the tubes, such that the fingers lay on the tubes in the region to be folded and assist in the folding process.

Abstract: A heat exchanger is provided. The heat exchanger includes a plurality of manifolds and first and second pluralities of tubes that extend between different pairs of the plurality of manifolds. The heat exchange tubes each include a heat exchange portion extending along a straight direction, an outlet portion extending a transverse axis and a transition portion that connects the heat exchange portion to the outlet portion, wherein the transition portion transitions simultaneously in the transverse direction and along an offset axis, wherein the changing direction has vector components along both the transverse axis and the offset axis along the length of the transition portion. Wherein an end of the heat exchange as a jog region that comprises a bend along the offset axis.

Abstract: A heat exchanger is provided. The heat exchanger includes a plurality of manifolds and first and second pluralities of tubes that extend between different pairs of the plurality of manifolds. The heat exchange tubes each include a heat exchange portion extending along a straight direction, an outlet portion extending a transverse axis and a transition portion that connects the heat exchange portion to the outlet portion, wherein the transition portion transitions simultaneously in the transverse direction and along an offset axis, wherein the changing direction has vector components along both the transverse axis and the offset axis along the length of the transition portion. Wherein an end of the heat exchange as a jog region that comprises a bend along the offset axis.

Abstract: A heat exchange system for controlling heat within an indoor space is provided. The system includes a heat exchanger located within the indoor space and a dual flow heat exchanger that is located in a space that is not temperature regulated by the system. The outdoor dual flow heat exchanger has flow through two different pluralities of parallel tubes that are interspersed between each other. The system includes a first expansion valve located within the indoor space to receive flow from one of the two sets of parallel tubes and cause flow to the indoor heat exchanger. The system includes a second expansion valve located in the non-temperature regulated space, wherein the second expansion valve receives flow from the second set of tubes and returns expanded lower pressure flow to the first set of tubes.

Abstract: A method of controlling the performance of a refrigeration system includes operating first and second heat exchangers, the first to remove heat from one or both of a space where the first heat exchanger is disposed or a component within the space where the first heat exchanger is disposed. The first heat exchanger has a first set of parallel tubes between manifolds, the second heat exchanger has a second set of parallel tubes between manifolds the first and second tubes alternating in spaces between each other; Refrigerant that flows through the first set of tubes additionally flows through the second set of tubes before the refrigerant again flows through the first set of tubes. Operating a second heat exchanger that is fluidly connected with both of the first set of tubes and the second set of tubes.

Abstract: A heat exchanger is provided. The heat exchanger includes a plurality of manifolds and first and second pluralities of tubes that extend between different pairs of the plurality of manifolds. The heat exchange tubes each include a heat exchange portion extending along a straight direction, an outlet portion extending a transverse axis and a transition portion that connects the heat exchange portion to the outlet portion, wherein the transition portion transitions simultaneously in the transverse direction and along an offset axis, wherein the changing direction has vector components along both the transverse axis and the offset axis along the length of the transition portion. Wherein an end of the heat exchange as a jog region that comprises a bend along the offset axis.

Abstract: A heat exchanger for use in an outdoor environment with a heat pump system is provided. The heat exchanger includes a first set of tubes arranged in a parallel flow manner between a first manifold and a second manifold, wherein central straight portions of adjacent tubes are disposed with a space therebetween along each tube of the first set of tube between the first and second manifolds. A second set of tubes are arranged in a parallel flow manner between a third manifold and a fourth manifold, wherein central straight portions of adjacent tubes within the second set of tubes are at least partially disposed within the space between adjacent tubes of the first set of tubes. A fluid that flows through the first set of tubes additionally flows through the second set of tubes before the fluid returns to again flow through the first set of tubes.

Abstract: A heat exchanger for use in an outdoor environment with a heat pump system is provided. The heat exchanger includes a first set of tubes arranged in a parallel flow manner between a first manifold and a second manifold, wherein central straight portions of adjacent tubes are disposed with a space therebetween along each tube of the first set of tube between the first and second manifolds. A second set of tubes are arranged in a parallel flow manner between a third manifold and a fourth manifold, wherein central straight portions of adjacent tubes within the second set of tubes are at least partially disposed within the space between adjacent tubes of the first set of tubes. A fluid that flows through the first set of tubes additionally flows through the second set of tubes before the fluid returns to again flow through the first set of tubes.

Abstract: A heat exchanger for use in an outdoor environment with a heat pump system is provided. The heat exchanger includes a first set of tubes arranged in a parallel flow manner between a first manifold and a second manifold, wherein central straight portions of adjacent tubes are disposed with a space therebetween along each tube of the first set of tube between the first and second manifolds. A second set of tubes are arranged in a parallel flow manner between a third manifold and a fourth manifold, wherein central straight portions of adjacent tubes within the second set of tubes are at least partially disposed within the space between adjacent tubes of the first set of tubes. A fluid that flows through the first set of tubes additionally flows through the second set of tubes before the fluid returns to again flow through the first set of tubes.

Abstract: A spacer device for incorporation into a bent-tube heat exchanger that includes a spine and a plurality of fingers that protrude from one side of the spine. The number of fingers in the spacer device is less than the number of tubes that are folded in a region to form the bent-tube heat exchanger. The plurality of fingers are configured to exert a force against the tubes and to provide and maintain a separation between the tubes in the folded region. A heat exchanger that includes the spacer device may also include a coating on the tubes in the folded region in order to reduce corrosion and increase the life-time of the heat exchanger. The method of forming the heat exchanger includes placing the spacer device between the tubes, such that the fingers lay on the tubes in the region to be folded and assist in the folding process.

Abstract: A heat exchanger has an upper manifold with a first curved section; a lower manifold spaced from and extending parallel to the upper manifold and having a second curved section; a plurality of refrigerant tubes, and a plurality of corrugated fins. Each corrugated fin is formed by a strip having radiused portions alternating with planar portions, and the radiused portions are in contact with the respective adjacent refrigerant tubes. Each of the fins has a curve-inner edge and a curve outer edge and at least one edge of the curve-inner edge and the curve outer edge of at least one fin has a recessed portion in the planar portions that is recessed inward toward a center of the core.

Abstract: A heat exchanger (1) for a motor vehicle (2), has first flat tubes (3) with a first longitudinal end (4) received in associated first openings (5) of a first collector (6) and with an opposite second longitudinal end (7) in associated second openings (8) of a second collector (9). Second flat tubes (10) have a first longitudinal end (11) received in associated third openings (12) of a third collector (13) and a second longitudinal end (15) in associated fourth openings (16) of the second collector (9). Only the first flat tubes (3) or both the first and second flat tubes (3, 10) have an angled end region (14). The second and fourth openings (8, 16) are arranged spaced apart from one another with heat transfer fins (18) in between.

Abstract: A flat tube for a heat exchanger has a tube body with an outer top and an outer bottom surface arranged opposite one another at a thickness of the tube body and two outer side surfaces arranged opposite one another at a width of the tube body and connecting the outer top and bottom surfaces. The tube body has a heat exchange portion extending along an extension direction, an angled portion extending along an transverse direction inclined relative to the extension direction, and a bent portion connecting the heat exchange portion to the angled portion. The angled portion is arranged at a distance from the heat exchange portion in an offset direction. The bent portion has a first end region facing the heat exchange portion with a first bend counter to the offset direction and a second end region facing the angled portion with a second bend in the offset direction.

Abstract: A heat exchanger has an upper manifold with a first curved section; a lower manifold spaced from and extending parallel to the upper manifold and having a second curved section; a plurality of refrigerant tubes, and a plurality of corrugated fins. Each corrugated fin is formed by a strip having radiused portions alternating with planar portions, and the radiused portions are in contact with the respective adjacent refrigerant tubes. Each of the fins has a curve-inner edge and a curve outer edge and at least one edge of the curve-inner edge and the curve outer edge of at least one fin has a recessed portion in the planar portions that is recessed inward toward a center of the core.

Abstract: A heat exchanger has an upper manifold with a first curved section; a lower manifold spaced from and extending parallel to the upper manifold and having a second curved section; a plurality of refrigerant tubes, and a plurality of corrugated fins. Each corrugated fin is formed by a strip having radiused portions alternating with planar portions, and the radiused portions are in contact with the respective adjacent refrigerant tubes. Each of the fins has a curve-inner edge and a curve outer edge and at least one edge of the curve-inner edge and the curve outer edge of at least one fin has a recessed portion in the planar portions that is recessed inward toward a center of the core.

Abstract: Embodiments of the invention provide methods, apparatus, and articles of manufacture for editing network parts present a computer-aided design (CAD) model of a utility network using grips. The network parts may represent elements present in a real-world utility network. Among others, the grips may include a part size grip and a structure rotation grip. When a user selects a part size grip, a graphical user interface may display hash marks to indicate a variety of sizes of the network part provided by a network parts catalog. Dragging the resize grip may cause it to jump from one hash mark to the next, allowing the user to easily select one of the available part sizes. A structure rotation grip may be used to rotate a network part representing a utility network structure about an asymmetric axis.

Abstract: Embodiments of the invention provide methods, apparatus, and articles of manufacture for editing network parts present a computer-aided design (CAD) model of a utility network using grips. The network parts may represent elements present in a real-world utility network. Among others, the grips may include a part size grip and a structure rotation grip. When a user selects a part size grip, a graphical user interface may display hash marks to indicate a variety of sizes of the network part provided by a network parts catalog. Dragging the resize grip may cause it to jump from one hash mark to the next, allowing the user to easily select one of the available part sizes. A structure rotation grip may be used to rotate a network part representing a utility network structure about an asymmetric axis.