GB537507A - Improvements in absorption-refrigerating systems - Google Patents

Abstract

537,507. Refrigerating. ELECTROLUX, Ltd. Nov. 7, 1939 No. 29584. Convention date, Dec. 22, 1938. [Class 29] Absorption systems. In a continuous-cycle inert gas system the gas heat exchanger 18 is constructed so that the part of its outer surface exposed to the cabinet insulation and to the outer atmosphere is contacted on the inside by relatively warm weak inert gas from the absorber 21, to maintain its temperature above that at which atmospheric moisture would condense on the surface and give rise to corrosion. The part of the exchanger in the interior of the cabinet is constructed in the usual manner to maintain it cold. In the .arrangement shown a casing 27 is provided at the part of the exchanger outside of the storage space, warm weak inert gas flows thereto through a conduit 29, and after flowing around the shell of the exchanger to provide a triple heat exchange the weak gas passes through the tubes and through a conduit 35 to the evaporator, which comprises the usual low-temperature portion 33 and cabinet' cooling portion 16. The cold inert gas refrigerant mixture returns from the top of the evaporator to the-shell of the exchanger. In a modification the casing 27 extends downwards around the pipe 19 conveying the inert gas and refrigerant vapour to the solution reservoir 20, and weak solution is supplied from the generator to the casing and overflows therefrom into the absorber. The casing may extend over the whole of the exchanger, particularly where the exchanger is arranged within the thickness of the cabinet insulation.