GB210452A - - Google Patents

Abstract

210,452. Jauvert, P. M. Jan. 26, 1923, [Convention date]. Refrigerating, compression machines for; cold accumulators; cold-storage rooms.-In a refrigerating plant comprising evaporator coils 8 disposed in tanks 10 containing congealable brine, and an intermittently operated fan 11, controlled by a thermal device 36, for circulating the air of a cold-storage room 12 over the surfaces of the tanks, the flow of cooling-water to the compression machine of the plant is controlled according to the temperature of the brine in the tanks 10, which depends in part upon the operation of the fan and accordingly upon the temperature in the cold-storage room. The flow of cooling-water serves to control the operation of the compressor 1, as by controlling the switch 34 of an electric driving-motor 2, and preferably also controls means, for supplying water to rinse the walls of the brine tanks and thereby remove accumulated rime. The cooling-water for the condenser 4 of the plant is supplied through a pipe 5<1>, and its flow is controlled by a sliding valve 15 in a, casing 14. The valve is actuated by a pin 24 on a diaphragm 23 subject to movement due to the expansion and contraction of congealable brine contained in tubes 20 immersed in the brine in the tanks 10. One of the tubes 20 is placed near an evaporator coil 8 and the other near the wall of the brine tank, so that the brine in the tubes is at the mean temperature of the cooling-brine. The pin 24 has a lost-motion connection with the valve 15 so that the valve moves only at limiting temperatures. A branch 26 of the cooling-water pipe leads, to a cylinder 27 containing a spring- loaded piston 28, which is raised by the water pressure to maintain the switch 34 closed when the water is flowing, At each movement of the piston 28 due to resumption of the flow of cooling-water, it opens a cock 44 to supply water to prime a siphon 45, whereby water is delivered through a spray 46 over the walls of the brine tanks. The piston device 27 may be modified to give a quick breaking of the motor circuit and a gradual closing, for motors having a starting rheostat, and may be used for other driving- means.