ES35799U - Improved evaporator for refrigerators (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

An improved evaporator formed by a gas temperature changer located on a lower floor; by a U-tube or in another form, covered with fins or not, located on an intermediate floor, and, on an upper floor, by two U-tubes embracing each other, externally welded at the site of their loops and joined in the ends of two immediate branches to constitute a single conduit. The gas temperature changer is composed of two concentric tubes, with or without internal means to activate the passage of heat between its two opposite streams. At the far end of the assembly, the central tube of the exchanger carries a graft to be joined to the tube coming from the absorber of the apparatus, and the wide external tube will also have another graft to communicate with the reservoir. At the other end of the changer, the central tube joins the principle of the free branch of the embraced U-tube, of the upper floor. At that same end of the changer, its outer tube joins the principle of one of the branches of the intermediate floor tube; the end of the other branch of this intermediate tube, precisely the branch immediately to the junction between the exchanger and the upper floor, is joined to the free end of the broad U of the upper floor. Both splice arms can be welded together externally to achieve, if appropriate in that place, adequate heat transfer. The liquid ammonia that must evaporate comes from the condenser of the apparatus by a thin tube that is welded externally along a generatrix of the wide tube of the exchanger and which then passes to graft in the U-tube embraced from the upper floor, immediately after the splice said U-tube with the central tube of the exchanger. A partition, or other suitable device, prevents the liquid ammonia from being poured into said central exchanger tube. (Machine-translation by Google Translate, not legally binding)