Patent GB-430413-A (GB)
Title: Improvements in absorption refrigerating apparatus
IPC: F25B17/06
Filed: 1933-10-19
Abstract: 430,413. Refrigerating. ELFVING, T. M., 21, Erik Dahlbergsgatan, and HYLANDER, H., 64, Upplandsgatan, both in Stockholm. Oct. 19, 1933, No. 28960. Convention date, Oct. 20, 1932. [Class 29] Absorption machines.- A reversing system of the type adapted to rock under change of balance to effect reversal is provided with a closed cycle condensing cooling system which partakes of the rocking movement and comprises an element in heat exchange with the generator-absorber and another element forming a collecting vessel at a higher level. An arrangement for two systems out of phase is shown in Fig. 1. The generator-absorber vessels 1, 7 consisting of internally-finned tubes charged with calcium or strontium chloride, silica gel or other solid absorption material, are mounted on a frame pivoted at 28 and are connected by expulsion pipes 2, 8 with an air-cooled condenser element 10, which is connected by pipes 4, 11 to receivers 5, 12 supplying an evaporator 6 of a cabinet. The expulsion pipes are coiled at 26 so as to yield to the rocking movement of the lower elements, the evaporator and receivers being fixed. Each generatorabsorber is surrounded by a cooling pocket 20, 21, and these communicate respectively by pipes 23, 24 with opposite ends of a common condenser element 25 to form a closed cooling system adapted to rock with the generatorabsorbers. The apparatus may be heated electrically in which case a tilting switch 22 is fitted. Alternatively with gas heating a three-way gas cock is provided. With the parts in the position shown the left hand generator-absorber is being heated and the vapour of the medium in its cooling pocket is driven into the right hand side of the condenser element 25 and stored there as liquid, while the condensate from the left hand side of the element 25 flows into the pocket of the right-hand generator-absorber and there vaporizes to remove the heat of absorption. The amount of rocking is limited by adjustable stops 31, and the heating may be interrupted by a thermostat near the evaporator so as to delay the rocking movement. The invention may also be applied to a single system in which the generator-absorber is balanced against a weight on an arm movable between adjustable stops. In place of single wide bore conduits between the cooling pockets and the condenser elements, separate flow and return conduits of small bore may be used. The Specification, as open to inspection under Sect. 91, comprises also the following subject-matter : A closed cooling system with two cooling pockets 74, 75, Fig. 5 (Cancelled), includes oppositely inclined condensate receivers 78, 79, liquid traps 83, 86, and a common condenser element 80. When the generator-absorber 70 is being heated the liquid is driven from its cooling pocket and stored in the receiver 78. Liquid flows from receiver 79, which in this period is substantially horizontal, into the pocket of the other generatorabsorber 71 and there vaporizes, and the vapour flows back through the receiver 79 to the right hand side of the condenser 80 and the condensate into the lower receiver. The cooling and absorption in member 71 thus terminate as soon as all the medium previously stored in the receiver 79 has evaporated. In another arrangement each generator-absorber is provided with a cooling system comprising a pocket and a pipe extending laterally therefrom to an air-cooled condenser element at the side of the generatorabsorber. This subject-matter does not appear in the Specification as accepted.