GB548856A - Improvements in or relating to absorption refrigerating apparatus - Google Patents

Abstract

548,856. Refrigerating. ELECTROLUX, Ltd. Feb 13. 1942. No. 1929. Convention date, Feb 26, 1941. [Class 29] Absorption systems.-In a continuous-cycle inert gas system having two or more evaporators, refrigerant is distributed to the evaporators according to their individual requirements by regulating the flow to at least one of the evaporators mechanically or thermostatically. In the system shown in Fig. 1 refrigerant flows from the condenser 16 to a reservoir 19 from which an overflow 20 leads to one evaporator 10, connected by pipes 12, 13 to the inert gas circuit. A U-tube 21 connects the reservoir 19 with a vessel 22 from which another evaporator 11 I is supplied. Refrigerant is lifted in the right-hand limb of the U-tube by a heat pump, preferably comprising a closed condensing heat transfer system 25, 26, 27, 28, the evaporator portion 26 of this system being in thermal contact with the generator 17 or with the vapour expulsion pipe. The heat transfer system is controlled by a manual, clockwork or thermal valve 29, so that when this valve is closed no heat transfer circulation takes place and no refrigerant is raised in the U-tube 21 to the vessel 22 and the evaporator 10 alone receives supply. The evaporator element of the heat transfer system may effect rectification of expelled vapours, and the control of supply to the evaporator may be employed for effecting defrosting. In one modification supply to each of two evaporators is effected through separate U-tubes connected to the condensate reservoir. An alternative arrangement comprises a tilting reservoir 40, Fig. 3, connected to a resilient condenser coil 16, and resilent pipes 43, 44 leading to evaporators 45, 46. The pipes 43, 44 extend to different levels in the reservoir, which may be tilted by an arm 41 and cam 42 to alter the distribution of the liquid. As a modification of this form the reservoir may be divided by a mid partition on to either side of which refrigerant is delivered from the condenser.