METHOD AND DEVICE FOR COOLING OBJECT BY MEANS OF CASCADE THERMOELECTRIC BATTERY Russian patent published in 1997 - IPC

FIELD: refrigerating engineering; designing thermoelectric coolers for domestic and industrial refrigerators and freezers, as well as for medical and special-purpose thermocouple devices. SUBSTANCE: method is based on transfer of heat from object when controllable direct current is applied to terminals of battery. Magnitudes of controllable currents for working range of change of ambient temperature and temperature of object are determined beforehand; maximum refrigerating coefficient shall be ensured. Controllable currents are supplied in accordance with ambient temperature and are regulated depending on change in ambient temperature and temperature of object. At moment of switching on the battery, currents are supplied in accordance with preset time required for attaining the mode. Device used for realization of this method has two amplifiers; input of one amplifier is connected with temperature sensor of object and input of other amplifier is connected with ambient medium sensor. Its outputs are connected with first adder and Schmitt flip-flop; output of first adder is directly connected with second adder and with third adder through voltage divider. Outputs of second and third adders are connected with control inputs of current stabilizers of each stage of thermoelectric battery whose second control inputs are connected with output of Schmitt flip-flop. Power supply unit and controllable current stabilizer may be made in form of pulse converter and pulse current stabilizer. EFFECT: enhanced efficiency. 5 cl, 5 dwg