GB489647A - Improvements in or relating to methods of producing refrigeration and to refrigerating systems - Google Patents

Abstract

489,647. Refrigerating. BORGWARNER CORPORATION. Dec. 28, 1936, No. 35527. Convention date, Dec. 30, 1935. [Class 29] Compression systems.-A mixture of refrigerants of different boiling-points is evaporated in stages in an evaporator having an ice-making coil section 32 connected to a header 31 and an air-cooling tubular section 28, 38 supplied from another header 30 communicating with the first by conduits 43 at different levels, the two sections being at the same suction pressure. It is stated that the more volatile refrigerant evaporates mainly in the ice-making section at a lower temperature than the remainder in the other section. The ice-making coils and headers are located within a metal-walled compartment 24 and the air-cooling section, comprising straight finned tubes between sub-headers.34, 36, in the storage space of a cabinet. The system includes a float valve 17 controlling the flow of refrigerant from a receiver 15, and a thermal switch 20 controlling the motor 10 of the compressor 12. Refrigerants for the system may be dichlormonofluormethane and dichlordifluormethane; sulphur dioxide and dimethyl ether; and sulphur dioxide and methyl chloride. Specification 357,263<*> is referred to.