Abstract: A heat exchanger (1) includes a first manifold (2) and a second manifold (3) fluidically connected by at least one tube (4) with at least one brazed joint between one manifold (2,3) and the tube (4). The brazed joint is made of braze material. The first manifold (2) and the second manifold (3) are formed from non-braze materials with a higher melting point than the braze material. The non-braze material does not melt during brazing. At least one of the manifolds (2,3) has at least two non-braze material layers.

Abstract: A condenser having a receiver for use in an air conditioning system, having a plurality of refrigerant tubes, at least one header in hydraulic communication with the plurality of refrigerant tubes, and a receiver housing connected to the header. The receiver housing includes a refrigerant conduit nested within the spine of a desiccant bag. The spine divided the desiccant bag into two desiccant compartments, which are folded over the refrigerant conduit such that the desiccant compartments urge the refrigerant conduit onto the spine, thereby holding the desiccant bag in a predetermined position.

Abstract: A sub-cooled condenser for an air conditioning system, having a condenser portion, a sub-cooler portion located below that of the condenser portion, an adjacent receiver tank having a first fluid port in hydraulic connection with the condenser portion and a second fluid port in hydraulic connection with the sub-cooler portion, and a refrigerant diverter assembly disposed in the receiver tank. The refrigerant diverter assembly is configured to divert a refrigerant from the first fluid port to a location beneath the surface level of a refrigerant retained within the receiver tank without impacting the surface level. The refrigerant diverter assembly includes a refrigerant port in hydraulic connection with the first fluid port, axial and annular refrigerant passageways, and a refrigerant conduit having an inlet end in hydraulic communication with the annular passageway and a second fluid port beneath the surface level (S) of the liquid phase refrigerant.

Abstract: A sub-cooled condenser for an air conditioning system includes a condenser portion, a sub-cooler portion located below that of the condenser portion, an integral receiver tank having an upper receiver first chamber with a first fluid port in hydraulic connection with the condenser portion and a lower receiver second chamber having a second fluid port in hydraulic connection with the sub-cooler portion, and a refrigerant conduit disposed in the receiver tank. The refrigerant conduit may include a top entry end extending into the upper receiver first chamber and a bottom discharge end extending in the lower receiver second chamber, wherein the bottom discharge end may extend below the second fluid port. The condenser portion may include multiple passes in which the refrigerant flows in an upward direction from the inlet of the condenser portion to the first fluid port that is in hydraulic connection to the upper receiver first chamber.

Abstract: A sub-cooled condenser for an air conditioning system includes a condenser portion, a sub-cooler portion located below that of the condenser portion, an integral receiver tank having an upper receiver first chamber with a first fluid port in hydraulic connection with the condenser portion and a lower receiver second chamber having a second fluid port in hydraulic connection with the sub-cooler portion, and a refrigerant conduit disposed in the receiver tank. The refrigerant conduit may include a top entry end extending into the upper receiver first chamber and a bottom discharge end extending in the lower receiver second chamber, wherein the bottom discharge end may extend below the second fluid port. The condenser portion may include multiple passes in which the refrigerant flows in an upward direction from the inlet of the condenser portion to the first fluid port that is in hydraulic connection to the upper receiver first chamber.

Abstract: A condenser having a receiver for use in an air conditioning system, having a plurality of refrigerant tubes, at least one header in hydraulic communication with the plurality of refrigerant tubes, and a receiver housing connected to the header. The receiver housing includes a refrigerant conduit nested within the spine of a desiccant bag. The spine divided the desiccant bag into two desiccant compartments, which are folded over the refrigerant conduit such that the desiccant compartments urge the refrigerant conduit onto the spine, thereby holding the desiccant bag in a predetermined position.

Abstract: There is provided a process that includes providing an extruded fitting having a bore formed therein. The bore is machined from one or both sides of the extruded fitting to provide a ledge on one side for interacting with a corresponding fitting and a stop on the other. A pipe and braze sleeve are placed in combination into the bore and engage the stop. The pipe and bore include anti-rotation and location irregularities formed thereon to maintain a desired orientation of the parts. A mandrel is used to deform the pipe and sleeve to the shape of the bore. The parts are then brazed in a furnace.

Abstract: An elliptical cross section tube of novel construction that is capable of being expanded by a conventional conical tool of the type used to expand round cross section tubes. The tube is also reinforced by integral internal webs. The unexpanded tube cross section has concave lengthwise channels and concave internal webs that are all internally tangent to a circle representing a cross section of the expansion tool's conical head. As the head of the tool is pushed through the tube, it pushes the channels out into the fin hole while flattening the webs. The tube is thus mechanically bonded to the tube, and is left with a pair of internal reinforcing webs.

Abstract: An improved fastening clip of the U- or C-shaped type has a thread engaging hole in the axially opposed clip wall with a novel hole form. The perimeter surface of the hole includes a cooperating conical rim and pair of strengthening corrugations that work together to lead the fastener tip into the hole, as well as to strengthen and stiffen the surface. The corrugations also provide thread engaging bight portions close to the plane of the axially opposed clip wall, providing added fastening security with a relatively short fastener.

Abstract: A heat exchanger of the type for directing air across a core thereof for heat transfer with fluid flowing within the core includes a pair of tubes connected in parallel between an inlet and an outlet. The tubes form a plurality of passes across the face of the heat exchanger with tube bends at the ends of each pass defining a serpentine path. A header channel extends over the bends of the passes. The header channel includes a zinc alloy coating on the interior surface thereof in contact with the bends. The zinc alloy coating provides sacrificial corrosion that prevents corrosion of the bends.

Abstract: A radial refrigerant compressor assembly for use in automotive refrigerant systems and capable of being cycled between on and off conditions having a fluid passageway extending between the bottom portion of the discharge chamber which operates at discharge pressure and the suction chamber which operates at a reduced suction pressure. A valve is disposed within the fluid passageway and regulates the flow of lubricant between the discharge and suction chambers under the force of the pressure differential existing between these chambers just after the compressor is cycled on and just after the compressor is cycled off.

Abstract: A fluid pumping assembly including a control valve mounted in a control valve boss having an inlet exposed to the elevated discharge pressure of the discharge chamber and an outlet exposed to the reduced pressure of the crank case. The control valve is responsive to pressure differentials between the crank case and the discharge chamber and provides a fluid path between the crank case and the discharge chamber to allow lubricating fluid from the discharge chamber to be injected into the crank case through the fluid path provided by the control valve under the influence of the pressure differential existing between the crank case and the discharge chamber. The control valve boss partially bifurcates the discharge chamber to form first and second reservoirs such that oil is disposed on either side of the control valve boss in the first and second reservoirs.