GB321488A - Improvements relating to refrigerating apparatus - Google Patents

Abstract

321,488. Fitzpatrick, H. D., (Naamlooze Vennootschap Kodowa Refrigerator Co.). Aug. 31, 1928. Refrigerating, absorption machines for.-Means are provided for preventing flow of unevaporated refrigerant bark to the absorber, due to overfilling of the evaporator, and for the return of solvent collected in the evaporator. A generator-absorber 1 is connected through a valve 4 and pressure pipe 2 to acondenser 3 and liquefied-gas receiver 6, and the several evaporators 22 are supplied from the receiver through hand-operated valves 13 in pipe connections 1<a>, 7. Each evaporator is fitted at the top with a float chamber 21 containing a float valve 12, Fig. 2, adapted when the evaporator is filled with liquid to seat against the end 15 of a branch pipe 11<a> to the common suction or return pipe 11 and almost close the outlet from the evaporator, so that only evaporated refrigerant can return to the generator-absorber. The valves 13 comprise needle valves 23, Fig. 4, pressed against their seatings by springs but opened by hand levers 26 pivoted to the stems and casings. Check valves 9 provided in connections from the pressure conduits 7 prevent flow of refrigerant from one evaporator to another under difference of pressure. The pressure pipe 2 is connected through a valve 18 to the suction pipe 11, which is fitted with a valve 14, and a valve 17 is provided in a connection from the check valves 9 to the generator-absorber, so that by closing the valves 4 and 14 and opening the valves 17, 18, the condenser pressure may be transmitted through the suction pipe to evaporators, when solvent will be blown back to the generatorabsorber.