Patent GB-454522-A (GB)
Title: Improvements in absorption refrigerating machines
IPC: F25B17/00
Filed: 1935-06-01
Abstract: 454,522. Refrigerating. NEWMAN, S., 10, DÚry-Udza, Budapest. June 1, 1935, Nos. 16014 and 16015. Convention dates, July 5, 1934 and Nov. 19, 1934. [Class 29] Absorption machines.-In an intermittentlyacting apparatus of the kind in which weak liquor is expelled from the generator by the pressure developed therein, refilling of the generator with strong liquor is effected either by the pressure in the condenser or by the pressure of a spring compressed by the pressure produced in the generator. Fig. 1 shows an apparatus comprising a generator 1, which may be heated continuously, connected through a pipe 2 having a non-return valve 18 with an air-cooled condenser 3 which communicates with an evaporator 5 connected by a pipe 22 having a non-return valve 18 to the absorber 12 and through a valved, pressure-equalizing pipe 14 with a pipe 15 by which the pipe 2 is connected to a strong liquor collector 13. The absorber communicates through a weak liquor precooler 21 and a valved-pipe 11 with the generator and through a pipe having a non- return valve 18 with the collector which is connected to the generator by a valved-pipe. The pipe 15 is provided with valves 9, 17 and a vapour reservoir 16 which contains sufficient vapour at the condenser pressure to discharge the correct amount of strong liquor from the collector to the generator. At the end of the generating phase, the valve 7 is opened and weak liquor is expelled from the generator to the absorber. Following this, the valve 7 is closed and the valves 8, 9 opened so that strong liquor is forced from the collector to the generator by the pressure in the reservoir 16 which, during this operation is isolated from the condenser by closure of the valve 17. In a modification, the collector 13 is connected to a vessel 26, Fig. 2, adapted to contain the quantity of strong liquor to be forced into the generator. During refilling, the valves 8 and 9 are opened and the vessel 26 emptied by the pressure in the liquid refrigerant reservoir 25. Fig. 3 shows another arrangement in which the generator 1 communicates with a bellows chamber 33 having a cross-bar 40 secured to bars 41 slidable in a stationary frame 36 carrying a lower cross-bar 40 secured to a bellows chamber 38 containing a filler body 39 and connected by a pipe 29 having a non-return valve 18 to the absorber 13. During generation, the bellows chamber 33 expands and forces the cross-bars downwards thus compressing the spring 42 and drawing a charge of strong liquor into the bellows chamber 38 from the absorber 13. At the end of the generating phase, the valve 7 is opened and weak liquor flows rapidly from the generator through a preheater 21 to the absorber. Following this, the valves 8, 7 are opened and closed respectively and the spring 42 expands thus forcing the cross-bars upwards and compressing the bellows chamber 38 so that strong liquor passes therefrom through the pipe 20 to the generator. The Specification as open to inspection under Sect. 91 also describes apparatus having bellowstype generators and absorbers and springs for contracting them after expansion. Apparatus of this kind may comprise an absorption machine the heat supply to which is cut off by an electric switch operated by the expansion of the generator, combined with a compression machine operated by the alternate expansion and contraction of the generator, the refrigerant, e.g. methylamine, of the absorption machine being used to liquefy the refrigerant, e.g. methylchloride, of the compression machine. An evaporator for use with the apparatus comprises a vertical cylinder having a helical wire coil for distributing the refrigerant uniformly over the inner surface thereof. This subject-matter does not appear in the Specification as accepted.