Sealed compressor

Abstract

The present invention includes an electric component ( 331 ), a compression component ( 327 ), a sealed container ( 301 ), a suction pipe ( 324 ) and a discharge passage ( 405, 425 a , 425, 470, 473 ). The compression component includes a crankshaft ( 343, 709 ), an oil feeding mechanism ( 368, 431, 433, 434, 708, 712, 713 ), an oil feeding passage ( 440, 714 ), and a scattering suppressing section ( 355, 455, 458, 461, 610, 616, 619, 706, 716 ). The scattering suppressing section suppresses the lubricating oil from being scattered from an opening of the oil feeding passage.

1 . A sealed compressor comprising:
 an electric component;   a compression component actuated by the electric component; and   a sealed container which accommodates the electric component and the compression component and stores lubricating oil in a bottom portion thereof;   a suction pipe for guiding a refrigerant gas suctioned into and compressed by the compression component to an inner space of the sealed container; and   a discharge passage for guiding the refrigerant gas compressed by the compression component, from the compression component to outside of the sealed container;   wherein the compression component includes:   a crankshaft including a main shaft rotated by the electric component and an eccentric shaft which is eccentric with the main shaft;   an oil feeding mechanism provided in the main shaft to feed the lubricating oil stored in the bottom portion of the sealed container to slide portions of the compression component;   an oil feeding passage provided in the eccentric shaft, communicated with the oil feeding mechanism and having an opening in a surface of the eccentric shaft; and   a scattering suppressing section for suppressing the lubricating oil from being scattered from the opening of the oil feeding passage.   
     
     
         2 . The sealed compressor according to  claim 1 ,
 wherein the compression component further includes:
 a block provided with a compression chamber inside thereof; 
 a piston reciprocatable inside of the compression chamber; and 
 a cylinder head which is fastened to one end of the block and seals one end of the compression chamber; 
 wherein the scattering suppressing section includes a head separating wall provided integrally with the block and positioned between the cylinder head and the crankshaft. 
   
     
     
         3 . The sealed compressor according to  claim 1 ,
 wherein the opening of the oil feeding passage is provided in an upper end surface of the eccentric shaft.   
     
     
         4 . The sealed compressor according to  claim 1 ,
 wherein the scattering suppressing section includes a sealing lid for closing the opening of the oil feeding passage.   
     
     
         5 . The sealed compressor according to  claim 4 ,
 wherein the sealing lid has a small hole.   
     
     
         6 . The sealed compressor according to  claim 1 ,
 wherein the scattering suppressing section includes a guide cover which covers the opening of the oil feeding passage and opens at a lower end surface side of the eccentric shaft.   
     
     
         7 . The sealed compressor according to  claim 6 ,
 wherein the compression component further includes:
 a block provided with a compression chamber inside thereof; 
 a piston reciprocatable inside of the compression chamber; and 
   a thrust bearing mechanism which is provided in the block and supports the crankshaft such that the crankshaft is rotatable;   wherein the scattering suppressing section includes a scattering direction changing section one end of which is communicated with an opening of the guide cover and the other end of which extends toward the thrust bearing.   
     
     
         8 . The sealed compressor according to claim,
 wherein the compression component further includes:   a block provided with a compression chamber inside thereof;   a piston reciprocatable inside of the compression chamber;   a connecting rod, a smaller-end portion of which is rotatably connected to the piston and a larger-end portion of which is rotatably fitted to the eccentric shaft; and   a larger-diameter groove formed in an outer peripheral surface of the eccentric shaft in a fitting portion at which the eccentric shaft is fitted to the larger-end portion of the connecting rod or a surface of the larger-end portion of the connecting rod in the fitting portion at which the larger-end portion is fitted to the eccentric shaft;   wherein the opening of the oil feeding passage is formed in the outer peripheral surface of the eccentric shaft, and the larger-diameter groove is communicated with the opening; and   wherein the scattering suppressing section includes the larger-end portion of the connecting rod, and a closed oil feeding passage formed inside of the eccentric shaft such that the closed oil feeding passage is communicated with the oil feeding passage, one end thereof opens in a lower end surface of the eccentric shaft and the other end thereof is closed.   
     
     
         9 . The sealed compressor according to  claim 1 , further comprising:
 a chamber provided in a portion of the discharge passage and having an inner space defining an expansion space of the refrigerant gas compressed by the compression component.   
     
     
         10 . The sealed compressor according to  claim 9 ,
 wherein the scattering suppressing section includes a blocking wall provided between the crankshaft and the chamber.   
     
     
         11 . The sealed compressor according to  claim 1 ,
 wherein the compression component further includes:   a block provided with a compression chamber inside thereof;   a piston reciprocatable inside of the compression chamber;   a valve plate provided at an end portion of the compression chamber and including a suction hole and a discharge hole;   a cylinder head having a space communicated with the compression chamber via the suction hole and the discharge hole; and   a valve sub-plate provided between the valve plate and the cylinder head to suppress heat from being transferred between the block and the cylinder head.   
     
     
         12 . The sealed compressor according to  claim 11 ,
 wherein the valve sub-plate has a non-contact space in at least one of a surface at the valve plate side and a surface at the cylinder head side, the non-contact space being formed by reducing a wall thickness of the valve sub-plate.   
     
     
         13 . The sealed compressor according to  claim 1 ,
 wherein the lubricating oil has a viscosity which is equal to or less than 8 centistokes at 40 degrees C.   
     
     
         14 . The sealed compressor according to  claim 1 ,
 wherein the refrigerant gas includes a cooling medium containing at least one of fluorine atoms and a double bond of oxygen; and   wherein the sealed compressor constitutes a closed refrigeration system.   
     
     
         15 . The sealed compressor according to  claim 1 ,
 wherein the refrigerant gas includes a hydrocarbon-based cooling medium; and   wherein the sealed compressor constitutes a refrigeration system which is limited in an amount of the refrigerant gas filled therein.   
     
     
         16 . The sealed compressor according to  claim 1 ,
 wherein the sealed compressor constitutes a refrigeration system for heating.   
     
     
         17 . The sealed compressor according to  claim 1 ,
 wherein the sealed compressor is used for freezing or chilling; and   wherein the sealed compressor constitutes a closed refrigeration system in which a compression ratio is greater than 10.