Abstract: A heat transfer device for a motor vehicle includes a rib/tube block arranged between two collection containers. The tube ends of the fin/tube block are widened in the area of each collection container and are then brought together flat into end packets. Both collection containers are set flush to a respective tube end packet and brazed hermetically to the same. At least one collection container is provided with at least one partition wall that divides the collection container. The partition wall has an outer contour that corresponds to the inner contour of the wall of the collection container. As a result, the partition wall can be soldered hermetically around the inner contour. A holding leg is provided on the partition wall and is inserted over two adjacent wall sections of neighboring tube ends of the tube end packet. One use of the device is as a water/air radiator.

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 heat exchanger mounted in an air condition is constructed such that at least one row of heat conduction pipe groups are arranged across an air passage. Each heat conduction pipe group is constructed such that a plurality of heat conduction pipes 22 are arranged in parallel with each other and a fine wire 23 made of a metallic material having excellent heat conductivity is spirally wound around each adjacent heat conduction pipe 22. Thus, the performance of the heat exchanger can be improved without the air conditioner being designed with larger dimensions.In addition, the heat exchanger includes a plurality of heat conduction pipes 39 arranged in the form of at least one row with a constant distance between adjacent pipes, and a plurality of twisted wires 40.

Abstract: A heat exchanger for a heating or cooling circuit of a motor vehicle comprises a header plate with a header cover sealingly secured over it, and a number of tubes extending through the header plate. The outer flanks of the collar portions of the header plate, which surround the ends of the tubes situated at the ends of the row of tubes are joined directly, along an inclined plane, to the peripheral channel in which the peripheral edge portion of the header cover is received. The overall length of the header plate, and therefore that of the heat exchanger as a whole, is thereby reduced.

Abstract: A plurality of each of said heat-exchanger coils each having a different winding diameter are provided between a header in the inlet side provided in an inlet tube and a header in the outlet side provided in the outlet tube so that the two headers are communicated to each other, and also a group of heat-exchanger coils each surrounded by another heat-exchanger coil having a larger diameter as compared to that of the former is provided.

Abstract: An improved ground source heat pump system wherein the subterranean piping installation comprises modular heat exchange units. Each modular heat exchange unit comprises a plurality of parallel secondary conduits. The secondary conduits are connected between primary conduits by means of multi-tiered inlet and outlet manifolds. Each manifold comprises a three-way "T" or end member and at least one and probably several four-way connecting members. Each of the end members has one inlet and at least one and preferably two outlets. Each connecting member has one inlet and at least two and preferably three outlets. The inlets and outlets of the end members and connecting members are configured to interconnect interchangeably in male-female fashion. Elbow units are used to connect the ends of the secondary conduits with the inlets and outlet of the end members and connecting members. Thus, only two types of components are necessary to build heat exchange units having any number of secondary conduits.