Abstract: An air-conditioning condenser has a reservoir screwed axially into a base which itself is brazed onto a header box of the condenser. The reservoir communicates with the header box through pipes formed in the base. The condenser is suitable for use in the air conditioning apparatus for automobile passenger compartments.

Abstract: A heat exchanger is provided with a mounting means for fastening an accessory to the heat exchanger. The heat exchanger comprises a set of parallel flat tubes, and a set of cooling fins lying generally at right angles to the planes of the flat tubes and being inserted between two parallel flat tubes. The tubes and the cooling fins are arranged alternately with each other. At least one of the tubes is replaced by a mounting plate having at least one fastening lug projecting from a side edge of the mounting plate. The accessory is attached to the heat exchanger through the fastening lug.

Abstract: An axial flow fan has a hub with a longitudinal axis of rotation and an outer periphery for the hub. Several blades are secured at their root regions to the hub's outer periphery. Each of the blades has a medial line that is tangential to a respective hub radius at the hub's outer periphery.

Abstract: The invention concerns a condenser for a refrigeration circuit able to have passing through it a refrigeration fluid and comprising a removable reservoir connected to a header of the condenser and able to have the refrigeration fluid passing through it.The reservoir is produced in the form of a replaceable cartridge provided with a connection able to cooperate with a base of conjugate shape which is fixed to the header and connected to the latter by an inlet manifold and an outlet manifold for the refrigeration fluid.Application notably to air conditioning installations for motor vehicles.

Abstract: A condenser for a motor vehicle air conditioning system, through which a refrigerant fluid flows, comprises a bundle of tubes fitted between two vertical headers, together with a separate reservoir which is installed vertically close to one of the headers. The walls which define the reservoir and associated header have respective vertical passages in the form of slots, each extending over the whole height of the condenser or header. A metal connecting plate has a first longitudinal edge portion and a second longitudinal edge portion, which are received in the respective slots in such a way that the two walls are immobilized against each other in the region of these passages. The connecting plate has at least one cut-out portion or bight through which the refrigerant fluid can flow between the header and the reservoir at a selected location.

Abstract: A condenser for a motor vehicle air conditioning installation includes a fluid header in two parts, comprising an upper profiled element and a lower profiled element which are assembled together through their respective marginal regions. The marginal regions of the two elements are snap fitted together so as to hold them together before brazing.

Abstract: A heat exchanger, especially a heating or cooling radiator for a motor vehicle, has a tube bundle consisting of oval or oblong tubes which extend through a matrix of cooling fins. End portions of the tubes are introduced into holes in a header plate, with a compressible sealing gasket being interposed, the gasket having collar portions surrounding the tube end portions, and the latter having an oval or oblong cross section. The major axis of each tube end is equal to the major axis of the body of the tube, while the minor axis of the tube end is greater than the minor axis of the body of the tube as a result of the tube having been expanded or flared during the assembly of the heat exchanger.

Abstract: A condenser for a cooling circuit conveying a refrigerant, including a bundle of tubes mounted between a first collecting box and a second collecting box, an inlet for the gaseous refrigerant, an outlet for the condensed refrigerant, and a reservoir through which the refrigerant may flow. The reservoir is housed in the collecting box and communicates via at least one aperture with a downstream portion of the bundle on the outlet side of the condenser. The condenser is useful for motor vehicle air conditioning.

Abstract: A heat exchanger comprises a condenser in which the lateral cheeks serving for the attachment of the condenser are replaced by the end tubes of the array, which open into the collectors beyond end partitions therein so as to be separated from the circulation of the liquid coolant. In this way, the particular parts formed by the cheeks and the positioning operation thereof are omitted.

Abstract: The cooling circuit of an internal combustion engine of a vehicle includes a thermally insulated reservoir having an inlet duct and an outlet duct. These ducts are connected to the mass of air in a head space either within the expansion vessel in the cooling circuit or within the reservoir itself, in such a way that the inlet and outlet ducts become filled with air when the motor is stopped. This air then physically separates the liquid in the reservoir from that contained in the rest of the circuit, so reducing heat losses.

Abstract: A header plate has a central portion in which at least one row of holes are formed. The heat exchanger includes tubes which are fitted in these holes, and each hole is made in a press-formed element which comprises at least two raised elements aligned with each other. The respective dimensions of these raised elements are predetermined, and they are adapted to be pierced individually or in combination by means of perforating tools having different characteristic dimensions in at least the direction in which the raised elements are aligned with each other. Tubes of different dimensions in at least this alignment direction can be introduced into the holes.

Abstract: A device for electrically connecting a motor-fan unit mounted on the body of a heat exchanger. The connecting device includes an elongate bar that may be placed flat along the large side of the exchanger body and consists of an insulating core in which at least two electrical conductors are embedded, a first plug connector arranged at one end of the bar for connection to a plug connector of the electric motor of the motor-fan unit, and a second plug conenctor arranged at the other end of the bar for connection to a plug connector of an electrical control circuit. The device may be used in motor vehicles.

Abstract: A multi-chamber expansion device for a vehicle cooling or heating circuit consists of a single vessel in which the three successive chambers of the expansion device are aligned horizontally within a rigid elongate casing, which is formed by two moulded hollow members welded together along their respective peripheral edges in a vertical junction plane. These edges are thickened and formed with a groove which extends over substantially the whole periphery of the vessel, at the joint between the two casing members. This groove is interrupted by integral bridges so as to define ducts which connect together, firstly the first and second chambers, and secondly the second and third chambers, through a pressure-limiting valve.

Abstract: A tubular heat exchanger for a motor vehicle has a header comprising a header plate and a header cover brazed to the header plate. The header plate has a base portion which is arranged to be joined to the bundle of tubes of the heat exchanger, and the header cover is terminated by a peripheral edge portion which is engaged within a peripheral flange of the header cover surrounding the base portion of the latter. This base portion is provided with a multiplicity of press-formed projecting elements which are spaced apart close to the peripheral flange, and the peripheral edge portion of the header cover is held in contact with the header plate flange by these projecting elements prior to the brazing operation by which the edge portion of the cover is brazed to the header plate flange.

Abstract: In an assembly consisting of a heat exchanger, such as a cooling radiator for the internal combustion engine of a motor vehicle, together with a motorized fan unit mounted on the finned body of the heat exchanger for providing a forced draught through the latter, the motorized fan unit comprises an electric motor fixed on the heat exchanger body and driving a fan rotor which lies facing a major face of the heat exchanger body. A bundle of electric cables extending from the motor extends along at least part of that major face. The assembly includes an electrical connecting means including the bundle of cables and fastening means which holds the bundle of cables flat against the heat exchanger body and out of any contact with the fan rotor.

Abstract: A fixing lug provided on a fluid chamber of the heat exchanger has an elongate opening along which there is able to slide a bolt ensuring the clamping of the lug on a receiving lug. This sliding enables the heat exchanger to expand without mechanical stress.

Abstract: A fan for an automotive radiator has a hub with a group of blades extending radially outwardly from the hub. A support member joins together the outward extensions of the blades in the first group. A second group of blades extend radially outwardly from the support member and a second support member joins together the ends of the blades in the second group.

Abstract: A condenser for a refrigerating circuit, in particular an air conditioning installation for a motor vehicle, comprises two headers at respective ends of a bundle of tubes, together with a reservoir communicating with one of the headers. The reservoir and this header are integrated within a common casing having a tubular wall which is divided, by a longitudinal separating baffle, into a collecting chamber, constituting the header into which the tubes of the condenser are open, and a reservoir chamber which communicates with the collecting chamber through apertures formed in the longitudinal baffle. This baffle has a longitudinal edge engaged in a longitudinal slot in the casing wall, and another longitudinal edge which bears against the tubular wall, so that the various components can be secured together by brazing.

Abstract: A plate type heat exchanger, for effecting heat transfer between a first fluid and a second fluid, comprises a casing through which the second fluid flows, together with a stack of plates arranged in pairs alternately within the casing and along a stacking axis. The plates of each pair define between them a flow passage for the first fluid. Each plate has two communication apertures formed through it, to enable the first fluid to flow between the successive pairs of plates. Perturbator elements are arranged in these flow passages for perturbing the flow of fluid in the latter. Each plate is substantially square, with its communication apertures being aligned with each other in an alignment direction parallel to two sides of the square. Each perturbator element comprises lines of corrugations which extend in a direction at right angles to the alignment direction. The invention is applicable especially to oil coolers for motor vehicles.

Abstract: A fabricated flat heat exchanger tube, applicable especially to cooling radiators for motor vehicle engines, is divided into two by a reinforcing partition. The partition consists of a pleat extending into the interior of the tube and formed in the sheet metal strip from which the tube is fabricated. The regions of the strip which are adjacent to the pleat constitute a first main wall of the tube, while its two terminal or marginal regions are bent back at 180 degrees into the interior of the tube from the adjacent regions that constitute the second main wall of the tube. These terminal regions are brazed sealingly to the pleat. The outer dimensions of the tube in transverse cross section, and the quality of brazing, do not depend on the exact width of strip.