PRESSURE RESPONSIVE ELECTRIC SWITCH, PARTICULARLY AN EVAPORATOR THERMOSTAT FOR REFRIGERATORS

摘要

The invention relates to a pressure responsive electric switch, particularly an evaporator thermostat for refrigerators, of which the actuating element is held in equilibrium under the influence of two springs and a pressure generator, e.g. the operating bellows of a thermostatic system with a liquid-vapour filling, and effects switching-over in the one direction in a first switching position of lower pressure and in the other direction in a second switching position of higher pressure, the first spring being disposed between a setting device to fix the first switching position and a coupling station and the second spring being disposed between said coupling station and the actuating element, wherein the coupling station co-operates with a stationary first abutment when the pressure is higher than a first value.