Patent GB-415864-A (GB)
Title: Improvements in or relating to absorption refrigerating apparatus
IPC: F25B15/10
Filed: 1933-05-18
Abstract: 415,864. Refrigerating. ELECTROLUX, Ltd., 153, Regent Street, London.- (Assignees of Thomas, A. R. ; 519, West 123rd Street, New York, U.S.A.) May 18, 1933, No. 14407. Convention date, May 25, 1932. [Class 29.] Absorption systems and apparatus.-Liquid refrigerant is fed from the condenser to a higher level in the evaporator by a thermo-syphon action,preferably brought about by leading a conduit for condensed refrigerant in heat exchange with the absorber, so that the heat of absorption is dissipated in raising the condensate to the higher level. In a continuouscycle inert gas system shown diagrammatically in Fig. 1, vapour evolved in the generator 10 is led to an inclined aircooled rectifier 14 and passes by pipe 15 into a separator vessel 16 to which the condenser 18 is connected at 17. Condensate flows into a pressure vessel 20 and thence by a conduit 23 through a cooling coil 22 for the absorber 21, vapour being produced in this coil and serving to raise the unevaporated liquid to the separator 16, whence it flows through a trap 25 to the evaporator 26. The evaporator and absorber are connected in known manner by a gas heat exchanger 30 and the absorber and generator by a liquor heat-exchanger 33. The higher end of pressure vessel 20 is vented through a conduit 40 to the gas space of the absorber, and the vessel serves to store excess of pressure-equalizing gas when operating conditions are normal, as described in Specification 363,163. A machine located at the back of a cabinet is shown in Figs. 2 and 3, the absorber 71 being shown in detail in Fig. 5. A horizontal generator 41 with a stand-pipe 42 as described in Specification 300,589, [Class 29], is employed, and vapour evolved therefrom passes through strong liquor in an analyser 44 and through conduit 46 to an inclined aircooled rectifier 47. This rectifier is divided by a transverse partition 49, from which extends an open-ended tube 50, and its upper end is connected by a pipe 52 to the separator 53. The separator is connected by a pipe 58 to a header 59 of multiple air-cooled condenser coils 55, which are connected through a bottom header 60 and pipe 61 with the pressure vessel 62. This vessel has a sump 63 connected by a pipe 64 to a thermo-siphon conduit located inside the absorber and formed as a hollow helical partition 74, 75, Fig. 5, over which the weak liquor is delivered from a pipe 77. The partition is formed of plates united by edge flanges and welded at intervals on their surfaces. The refrigerant is lifted through pipe 65 up to the separator and flows to the evaporator 67 through pipe 66. The evaporator may consist of a drum carrying a flanged casting 94 having ice-making drawers 96, and is mounted on a movable panel 92 of the cabinet. The absorber, condenser and rectifier are located in a rear air flue, the generator being in a lower compartment 89, The system described permits the use of a condenser occupying a considerable part of the height of the flue. British Specification 382,867, U.S.A. Specification 1,849,685, and German Specification 511,216 also are referred to.