GB589373A - Improvements in absorption refrigerating apparatus - Google Patents

Abstract

589,373. Refrigerating. AKTIEBOLAGET ELEKTROLUX. Feb. 14, 1945, Nos. 3679 and 3680. Convention dates, March 3, 1944, and Dec. 13, 1944. [Class 29] Absorption systems.-In a boiler for continuous cycle inert gas systems of the kind having a heated pump tube 19, a liquid heat exchanger 11, a vertical conduit 15 containing an unbroken liquid column forming the reaction lead for the pump and communicating freely with an absorber vessel 14, and a second vertical conduit 17 from which weak liquor is passed to the absorber by a pipe 18, the pump tube 19 is heated within a zone located between the liquid level in the conduit 15 and the lowest point of the heat exchanger 11. The boiler conduit 15 is welded to the flue tube 10 and com-- municates at its lower end with the pump tube 19 also welded to the flue so that weak liquor is pumped into the tube 17 which, through the outer tube of the liquid heat exchanger, communicates by the pipe 18 with the absorber. Strong liquor from the absorber passes by a pipe 13 and the inner tube 12 of the liquid heat exchanger to the boiler conduit 15. The upper end of the conduit 17 opens into the vapour pipe 16 and the conduit 17 may also be in heat conductive relation to the flue tube. The pump tube is welded to the flue tube 10 between the points 20 and 21. In a modification an auxiliary boiler is provided comprising a tube connected to the boiler- 15 at a point slightly below the liquid level and connected at its lower end to the pump tube 19. Fig. 3 shows the boiler conduit spaced from the flue tube 10 at its lower part 22 to ensure sufficient heating of the pump tube at this part. This spacing may be provided by bending the boiler tube as shown or by suitable arrangement of the welding material between the upper parts of the boiler and flue tubes. The conduit 17 may form the boiler conduit.