Abstract:
The present invention relates to an aluminium brazing method conducted in an atmospheric-pressure furnace, which is characterized by the implementation of the following operational conditions: i) the filler alloy used is an alloy obtained by mechanical synthesis, comprising aluminium, silicon, nickel and optionally magnesium or other alloying elements, such as copper, zinc, silver, chromium and titanium; j) the oxygen content in the furnace is less than a few ppm, preferably less than 1 ppm and that the dew point in the furnace is below -30°C, preferably below -40°C and even more preferably still below -45°C.
Abstract:
A technique is provided for forming and coating heat exchangers. The heat exchanger may be of any suitable type, such as employing two or more manifolds, with tubes, such as multichannel tubes extending between the manifolds, with fins being provided around or between the tubes. The overall heat exchanger structure is made as a slab that is advanced through an oven, such as in a brazing zone. Heat applied in the brazing zone heats the entire slab to an elevated temperature, and immediately after the brazing zone the slab is hot formed to provide bends or other configurations or contours. A coating is then applied at the elevated temperature, and the heat exchanger may advance through a curing station at which cooling is controlled to promote curing of the coating. The overall process provides a streamlined integrated assembly and manufacturing procedure for formed and coated heat exchangers.
Abstract:
Heating, ventilation, air conditioning, and refrigeration (HVAC&R) systems and heat exchangers are provided which include dissimilar tube spacing configurations. The heat exchangers include multiple sets of multichannel tubes in fluid communication with each other. One set of multichannel tubes contains a plurality of tubes spaced apart at one spacing while the another set of multichannel tubes contains a plurality of tubes spaced apart at a different spacing. The different spacing between the multichannel tubes allows each set of tubes to be configured to the properties of the refrigerant flowing within the tubes.
Abstract:
Die Erfindung betrifft eine Lötanlage (1) zum Löten von Bauteilen, die auf einer Leiterplatte montiert sind, enthält ein Lötmodul (4) und umfasst mindestens eine mobile und auswechselbar im Lötmodul (4) einsetzbare Lötstation (8). Die Lötstation (8) und das Lötmodul (4) sind mit Mitteln für die gegenseitige Ausrichtung und mit zueinander passenden weiblichen bzw. männlichen Steckern ausgerüstet, wobei die Stecker Leitungen für Güter abschliessen. Beim Einsetzen der Lötstation (8) im Lötmodul (4) richten die genannten Mittel die Lötstation (8) bezüglich des Lötmoduls (4) aus. Die Lötanlage ist bevorzugt aus Modulen (2-5) zusammengesetzt, die in Transportrichtung hintereinander angeordnet und lösbar miteinander verbunden sind. Jedes Modul weist ein eigenes Transportsystem auf.
Abstract:
The invention relates to a method for soldering components, in particular heat exchangers, in particular made of aluminium materials, aluminium alloys or wrought alloys, in a soldering furnace, in particular a continuous soldering furnace or a batch-type soldering furnace, which comprises a muffle, which is flushed with protective gas in order to create a protective atmosphere. In order to make the production of soldered components easier, during the soldering of the components the muffle is supplied with such a greatly increased amount of gas, in particular protective gas or reaction gas, that a low-oxygen protective atmosphere is created.
Abstract:
A compact gas dryer (100) comprises a primary heat exchanger (200) exchanging heat between hot, incoming, contaminated gaseous medium and outgoing dry, cool gaseous 5 medium, a secondary heat exchanger (300) exchanging heat between incoming cold gaseous medium from the primary heat exchanger (200) and a refrigerant, and a condense trap (400) trapping condensable matter in the cooled gaseous medium exiting the secondary heat exchanger (300). 10 Afterwards, the dry, cool gaseous medium exchanges heat with the incoming contaminated gaseous medium in the primary heat exchanger. The primary heat exchanger (200), the secondary heat exchanger (300) and the condense trap (400) are combined into a single unit (100).
Abstract:
According to one aspect of the invention it is possible to rapidly heat a soldering item by reducing an initially larger volume flow at a constant or increasing temperature, effectively preventing small components from overheating. By using the volume flow of a convection heater to control effective heat transmission occurring on said soldering item, it is also possible to adapt the soldering process in an extremely flexible manner to special requirements by virtue of the fact that adjustment of a modified volume flow can be controlled in a very quick and precise manner.