REFRIGERATING PLANT Russian patent published in 1997 - IPC

FIELD: refrigerating engineering; refrigerating plants used for storage of perishable goods. SUBSTANCE: refrigerating plant includes isothermic chamber 1 and displacement-type single-cylinder refrigerating machine 2 working by reverse Stirling cycle. Machine 2 has inner working circuit including compression chamber 3 and expansion chamber 4 (gaseous helium is used as working medium) and buffer chamber 5 connected with compression chamber 3 by means of bypass passage 6. Compression chamber 3 and expansion chamber 4 are interconnected through regenerator 7 and heat exchangers 8 and 9 of above-mentioned chambers. Plant is provided with radiators 10 and 11; radiator 10 is arranged in isothermic chamber 1 and radiator 11 is arranged beyond it. Machine 2 is provided with reversible electric drive including rhombic crank mechanism 12 consisting of two crankshafts 13 whose rotation is brought in synchronism through synchronizing gear wheels 14 engaged together. Plant includes two external loops (I and II) for circulating intermediate heat-transfer agent by means of pumps 15 and 16. Loop I is connected with heat exchanger 9 of expansion chamber through radiator 10 located in isothermic chamber 1 and loop II is connected with heat exchanger 8 of compression chamber through radiator 11. Loop I is connected with control chamber of shut-off valve 17 mounted in bypass passage 6. Gear wheel 18 engaged with one of synchronizing gear wheels 14 is mounted on drive shaft of each of pumps 15 and 16. Main journal of each crank- shaft 13 holding synchronizing gear wheel 14 is kinematically linked with shaft of its individual drive electric motor. Rod 19 of main piston and/or 20 of expulsor may be connected with members of rhombic drive by means of hinges. EFFECT: enhanced reliability. 2 cl, 7 dwg