Compressor

Abstract

A compressor is provided that may include a passage separator provided between an electric motor drive and a compression device to separate a refrigerant passage from an oil passage. The passage separator may include a first partition wall and a second partition wall. The first partition wall may be disposed between an inner circumferential surface of a casing and a discharge hole of the compression device, and the second partition wall may be disposed between the discharge hole and a balance weight. Accordingly, the refrigerant passage may be separated from the oil passage between the compression device and electric motor drive, thereby efficiently recovering oil to an oil storage space.

What is claimed is: 
     
       1. A compressor, comprising:
 a casing having an internal space;   a drive comprising a stator fixed to the internal space, a cut surface being provided on an outer circumferential surface of the stator to be separated from an inner circumferential surface of the casing, and a rotor rotatably provided within the stator;   a compression device provided at one side of the drive and having a discharge hole so as to discharge compressed refrigerant into an internal space of the casing; a rotational shaft configured to transfer a drive force from the drive to the compression device; and   a passage separator provided between the drive and the compression device to separate a refrigerant passage from an oil passage, wherein the passage separator surrounds at least a portion of the discharge hole and guides compressed refrigerant coming out of the discharge hole in an axial direction of the rotational shaft.   
     
     
       2. The compressor of  claim 1 , wherein the passage separator is formed in a tube shape to accommodate the discharge hole, and wherein an end of the passage separator on a side adjacent the drive is formed to have a height difference. 
     
     
       3. The compressor of  claim 2 , wherein the end of the passage separator is formed such that a first surface located at an outer side of the discharge hole with respect to the rotational shaft is formed to be higher than a second surface located at an inner side thereof. 
     
     
       4. The compressor of  claim 1 , wherein the passage separator is formed in an arcuate cross-sectional shape. 
     
     
       5. A compressor, comprising:
 a casing having an internal space;   a drive comprising a stator fixed in the internal space and a rotor rotatably provided within the stator;   a compression device provided at one side of the drive and having a discharge hole so as to discharge compressed refrigerant into the internal space of the casing;   a rotational shaft configured to transfer a drive force from the drive to the compression device;   a balance weight provided on the rotor or the rotational shaft; and   a passage separator provided between the drive and the compression device to separate a refrigerant passage from an oil passage, wherein the passage separator includes a first partition wall and a second partition wall, wherein the first partition wall is provided between an inner circumferential surface of the casing and the discharge hole of the compression device, and the second partition wall is provided between the discharge hole and balance weight, wherein the compression device further includes at least one oil recovery passage that communicates with the oil passage and is provided at one side of the compression device, wherein the first partition wall and second partition wall are connected by a third partition wall, and wherein at least a portion of the oil recovery passage is covered by the third partition wall.   
     
     
       6. The compressor of  claim 5 , wherein the first partition wall, the second partition wall, and the third partition wall are formed as an integral body. 
     
     
       7. The compressor of  claim 6 , wherein the integral body is fixed to the compression device. 
     
     
       8. The compressor of  claim 5 , wherein the oil recovery passage is covered by a member separate from the passage separator. 
     
     
       9. The compressor of  claim 5 , wherein the oil recovery passage includes a hole that passes through the compression device. 
     
     
       10. A compressor, comprising:
 a casing having an internal space;   a drive comprising a stator fixed in the internal space and a rotor rotatably provided within the stator;   a compression device provided at a lower side of the drive, having a plurality of compression chambers and a discharge hole so as to discharge compressed refrigerant from the plurality of compression chambers into the internal space of the casing;   a rotational shaft configured to transfer a drive force from the drive to the compression device, the rotating shaft having an eccentric portion to be coupled through a central portion of the compression device to overlap the compression chamber in a radial direction;   a balance weight provided on the rotor or the rotational shaft; and   a passage separator provided between the drive and the compression device to separate a refrigerant passage from an oil passage, wherein the passage separator includes a first partition wall and a second partition wall, wherein the first partition wall is provided between an inner circumferential surface of the casing and the discharge hole of the compression device, and the second partition wall is provided between the discharge hole and balance weight, wherein the compression device further includes at least one oil recovery passage that communicates with the oil passage and is provided at one side of the compression device, wherein the first partition wall and second partition wall are connected by a third partition wall, and wherein at least a portion of the oil recovery passage is covered by the third partition wall.   
     
     
       11. The compressor of  claim 10 , wherein the first partition wall, the second partition wall, and the third partition wall are formed as an integral body. 
     
     
       12. The compressor of  claim 11 , wherein the integral body is fixed to the compression device. 
     
     
       13. The compressor of  claim 10 , wherein the oil recovery passage is covered by a member separate from the passage separator. 
     
     
       14. The compressor of  claim 10 , wherein the oil recovery passage includes a hole that passes through the compression device. 
     
     
       15. A compressor, comprising:
 a casing including a discharge pipe through which a refrigerant is discharged and having a storage space in which oil is stored;   a drive coupled to an inner circumferential surface of the casing to rotate a rotational shaft;   a compression unit disposed in a direction away from the discharge pipe from the drive and coupled to the rotational shaft and lubricated with the oil to compress the refrigerant, and including a discharge hole to discharge the refrigerant or a mixture of refrigerant and the oil;   one or more space provided at at least a portion of an outer peripheral surface of the drive to recover the oil into the oil storage space;   one or more groove recessed in an outer surface of the compression unit to communicate with the one or more space;   a frame discharge hole provided on the compression unit and spaced apart from the discharge hole to discharge the refrigerant or the mixture of refrigerant and the oil toward the drive unit; and a1 first partition wall coupled to one of the compression unit or the drive and disposed between the discharge hole and the one or more groove, wherein the first partition wall is disposed between the frame discharge hole and the one or more groove.   
     
     
       16. The compressor according to claim 15, wherein the discharge hole penetrates through the compression unit in parallel with the rotational shaft. 
     
     
       17. The compressor according to claim 15, wherein the discharge hole is provided closer to the rotational shaft than the one or more groove, and wherein the first partition wall is disposed between the discharge hole and the one or more groove. 
     
     
       18. The compressor according to claim 15, wherein the first partition wall is provided between the compression unit and the drive to separate the oil or refrigerant discharged from the discharge hole from oil passing through the one or more space or the one or more groove. 
     
     
       19. The compressor according to claim 15, wherein at least one of ends of the first partition wall contacts the compression unit or the drive. 
     
     
       20. The compressor according to claim 15, wherein the first partition wall has a ring shape so that the rotational shaft and the discharge hole are disposed inside thereof. 
     
     
       21. The compressor according to claim 15, further comprising a balance weight coupled to the rotational shaft or the drive to damp vibration of the drive, and a second partition wall disposed between the balance weight and the discharge hole. 
     
     
       22. The compressor according to claim 21, wherein the second partition wall is configured to block exposure of an outer circumferential surface of the balance weight to the discharge hole. 
     
     
       23. The compressor according to claim 21, wherein the second partition wall is configured to shield a gap between the balance weight and the compression unit. 
     
     
       24. The compressor according to claim 21, wherein the second partition wall is longer than a distance between the balance weight and the compression unit. 
     
     
       25. The compressor according to claim 21, further comprising a third partition wall that connects the first partition wall and the second partition wall, wherein third partition wall is configured to be coupled to the drive or the compression unit.