GB637510A - Absorption refrigerating machine - Google Patents

Abstract

637,510. Refrigerating; tubular heatexchangers. BIANCHI, G. Sept. 30, 1946, No. 29096. Convention date, Dec. 20, 1945. [Classes 29 and 64(iii)] A continuous-cycle absorption system comprises a rectifier B providing a helical path for the vapour from the boiler A, a gas heat-exchanger D including an inner conduit 5, Fig. 3, of star-shaped crosssection providing a large heat exchange surface, and an absorber vessel E consisting of two drums 11, 12 connected by horizontal tubes 13, 14 through which the rich liquor is maintained in movement to continually renew the absorption surface. The rectifier B comprises outer and inner tubes 1, 2 with a spiral 3 in the annular space. From the condenser C the liquid refrigerant passes through a jacket 8 arranged around part of the gas heat exchanger and thence to the evaporator 25 by a pipe 37. Rich gas from the evaporator passes through ducts 33, formed between the outer conduit 4 of the gas heat exchanger and the star-shaped conduit 5, to a pipe 17 leading to the absorber vessel 12. The rich gas also passes through a centre tube 6 of the heat exchanger bent to join the pipe 17, while poor gas from the absorber 29 passes by a pipe 7, ducts 34 between the starshaped conduit 5 and the inner tube 6 of the heat exchanger apertures 36 and a pipe 35 to the evaporator. Liquid condensed in the gas heat exchanger returns by a pipe 10a to the absorber. The inner tube 6 of the heat exchanger may be closed at both ends, all the rich mixture passing through the ducts 33. The drums 11, 12 of the absorber vessel are connected by upper tubes 13 at about the rich liquid level, and lower tubes 14 of smaller diameter, the liquid entering the tank 11 through the pipe 15 causing a circulation of the rich liquid.