GB241291A - Improvements in and relating to ammonia refrigerating apparatus - Google Patents

Abstract

241,291. Hempel, H. July 18, 1924. Refrigerating, absorption machines for.-In a reversible apparatus the upper part of a generator-absorber a is connected to a rectifier b and thence through a ball-check valve to a pipe f leading to a condenser c and evaporator d. The lower part of the generator-absorber is also connected through a check valve with the pipe f, the arrangement of the check valves being such that outward flow of gas from the vessel a takes place from the upper part of the chamber and through the rectifier only, and the return flow proceeds only through the pipe leading to the bottom of the vessel. The two valves may be contained in the same or in separate casings. A displacing chamber i open only at the bottom is arranged in the generator-absorber a above the heating device h. The gas, such as ammonia, expelled on heating from the liquid in the chamber a fills the displacement-chamber i until perforations in a pipe k extending across the bottom of the chamber are exposed. The gas passes into the pipe and is conveyed through its turned-up end pieces l to the upper part of the chamber a. A cooling coil arranged in the displacement chamber is supplied continuously with cooling fluid from the condenser c, the effect of the cooling during generation being practically negligible when the liquid has been forced below the level of the coil.