Refrigerating compressor and refrigerating device using the same

Abstract

A refrigerating compressor includes a hermetic container accommodating oil, a motor accommodated in the container, a compressor unit provided under the motor and driven by the motor, and a vibration-proof cover. The compressor unit has a crankshaft including a main shaft and an eccentric section, a cylinder block, a piston, a connecting rod and a feed oil pipe. The cylinder block has a bearing to support the main shaft rotatably and a cylinder. The piston reciprocates in the cylinder. The connecting rod connects the piston to the eccentric section. The feed oil-pipe is fixed to eccentric section and an end thereof is dipped in oil. The vibration-proof cover is fixed to the cylinder block and surrounds the feed oil pipe with a given distance in between.

1 . A refrigerating compressor comprising:
 (a) a hermetic container accommodating oil;   (b) a motor accommodated in the hermetic container;   (c) a compressor unit disposed under the motor, accommodated in the hermetic container, and driven by the motor, the compressor unit including:
 (c-1) a crankshaft having a main shaft and an eccentric section; 
 (c-2) a cylinder block having a bearing supporting the main shaft rotatably, and a cylinder, 
 (c-3) a piston reciprocating in the cylinder; 
 (c-4) a connecting rod coupling the piston with the eccentric section; 
 (c-5) a feed oil pipe attached to the eccentric section and having an end dipped into the oil; and 
   (d) a vibration-proof cover fixed to the cylinder block and surrounding the feed oil pipe with a given distance in between.   
     
     
         2 . The refrigerating compressor according to  claim 1 , further comprising an elastic body provided between the vibration-proof cover and the cylinder block. 
     
     
         3 . The refrigerating compressor according to  claim 1 , wherein the vibration-proof cover is provided with a communicating hole having a diameter smaller than an inner diameter of the feed oil pipe. 
     
     
         4 . The refrigerating compressor according to  claim 3 , wherein an upper end of the vibration-proof cover extends upward and exceeds a surface of the oil. 
     
     
         5 . The refrigerating compressor according to  claim 1 , wherein the vibration-proof cover is formed of vibration damping material. 
     
     
         6 . The refrigerating compressor according to  claim 1 , wherein the feed oil pipe is formed of steel pipe, has a bent section, and is shaped as a V-shape including an obtuse angle. 
     
     
         7 . The refrigerating compressor according to  claim 6 , wherein an upper end of the vibration-proof cover extends upward and exceeds the bent section. 
     
     
         8 . The refrigerating compressor according to  claim 1 , wherein an inner wall of the vibration-proof cover is shaped as a body of revolution. 
     
     
         9 . The refrigerating compressor according to  claim 1 , wherein the oil is one of mineral oil and alkyl benzene, and the compressor compresses hydrocarbon as refrigerant. 
     
     
         10 . A refrigerating device comprising:
 the refrigerating compressor as defined in  claim 1 ;   a heat exchanger on heat radiation side coupled with the refrigerating compressor;   an expansion valve coupled with the heat exchanger on heat radiation side; and   a heat exchanger on heat absorption side coupled with the expansion valve configured to run refrigerant having undergone heat-absorption to the refrigerating compressor.   
     
     
         11 . The refrigerating device according to  claim 10 , wherein the refrigerant is hydrocarbon, and the oil is one of mineral oil and alkyl benzene.