Compressor

• US 20030108438A1
• Filed: 12/30/2002
• Published: 06/12/2003
• Est. Priority Date: 04/25/2000
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Seung-Jun, Cha, Kang-Wook, Ahn, Byung-Ha, Yang, Kwang-Sik, Hong, Song-Kie, Kim, Hui-Cheol, Sa, Bum-Dong, Kim, Young-Jong, Ha, Jong-Hun, Lee, Jang-Woo, Cho, Hyoung-Joo
• Application Number:
  US10/258,395
• Publication Number:
  US 20030108438A1
• Time in Patent Office: Days
• US Class Current: 417/312
• CPC Class Codes: F04C 18/3568 with axially movable vanes
• CPC Class Codes: F04C 2240/603 with internal channels for fluid distribution, e.g. hollow shaft
• CPC Class Codes: F04C 23/008 Hermetic pumps

Abstract

A compressor including a cylinder assembly having a compression space through which suction passages and discharge passages are connected, a rotation driving unit inserted into the compression space of the cylinder assembly to transfer a rotation force, a slant compression slanted plate installed in the compression space to divide the compression space into at least two parts and rotating by being connected to the rotation driving unit, and vane units attached on both sides of the slant compression plate to classify the partitioned compression space into a suction space and a compression. With this construction, a vibration and a noise can be reduced and a stable driving force can be obtained even with a relatively small capacity electric motor. In addition, since fluid can be compressed and discharged simultaneously in both sides of the slant compression plate, an excellent compression performance can be accomplished in a simple structure.

Claims

1. A compressor comprising:

a cylinder assembly having a compression space formed therein, and suction passages and discharge passages are connected to the space;

a rotation driving means inserted inside the compression space of the cylinder assembly for transmitting a driving force;

a slant compression plate located inside the compression space of the cylinder assembly for dividing the compression space into two or more spaces, and at the same time, for compressing in the respective spaces and discharging the fluid through the discharge passages while rotating connected to the rotation driving means; and

a vane means inserted into the compression space of the cylinder assembly so as to be undergone reciprocating movements and adhered to both surfaces of the slant compression space, for dividing the respective spaces divided by the slant compression plate into suction spaces and compression spaces by being located between the suction spaces and the discharge passages.

2. The compressor of claim 1, wherein the cylinder assembly is fixed inside a sealed casing, and a suction pipe connected with the suction passages and a discharge pipe are installed inside the sealed casing.

3. The compressor of claim 2, wherein the rotation driving means comprises an electric motor installed inside the sealed casing, and a rotating shaft inserted into the compression space of the cylinder assembly from the electric motor for driving the slant compression plate.

4. The compressor of claim 3, wherein oil is filled inside the sealed casing, an oil passage through which the oil flows is formed inside the rotating shaft, and an oil pump for sucking up the oil by the rotation of the rotating shaft is formed on the oil pump.

5. The compressor of claim 1, wherein the cylinder assembly comprises a cylinder, and a plurality of bearing plates forming the compression space by coupling to upper and lower parts of the cylinder and supporting the rotation driving means.

6. The compressor of claim 5, wherein two suction passages are formed to have a phase difference of 180°

in the cylinder, one is formed on upper end part of the cylinder, and the other is formed on lower end part of the cylinder

7. The compressor of claim 5, wherein the discharge passages through which the fluid compressed in the compression space is discharged are formed on the bearing plates, and a muffler is installed on outer part of the bearing plates so as to reduce discharge noise of the fluid.

8. The compressor of claim 5, wherein a plurality of vane slots are formed on the bearing plates so that the vane means can be inserted and undergone the reciprocating movement.

9. The compressor of claim 5, wherein a protruded coupling unit of circular shape, which is protruded into the compression space at a certain height and has an outer diameter corresponding to an inner diameter of the cylinder, is formed on the bearing plates.

10. The compressor of claim 9, wherein the slant compression plate is formed as a sine wave having an upper dead center and a lower dead center adhered to the upper side surface and to the lower side surface of the compression space, and makes the movement range of the vane means be limited between the protruded coupling unit by rotating with the upper and lower dead centers coupled to the protruded coupling unit.

11. The compressor of claim 9, wherein the rotation driving means includes a hub unit extended toward the circumferential direction on the circumference of the rotation driving means so that the slant compression plate can be installed, and a hub coupling recess is formed on the bearing plates so that a part of the hub unit is inserted into the center part of the protruded coupling unit.

12. The compressor of claim 1, wherein two suction passages and two discharge passages are disposed in the cylinder assembly, phase differences between the two suction passages and between the two discharge passages are all 180°

, and the vane means are located respectively between the suction passage and the discharge passage which are adjacent with each other.

13. The compressor of claim 1, wherein two compression spaces are formed centering around the slant compression plate inside the cylinder assembly, the first suction passage and the first discharge passage are connected into the first compression space, and the second suction passage and the second discharge passage are connected into the second compression space.

14. The compressor of claim 13, wherein the cylinder assembly is fixed inside the sealed casing and the suction pipe and the discharge pipe are installed in the sealed casing;

and the first and second suction passages are connected to the suction pipe, and the first and second discharge passages are communicated into the sealed casing.

15. The compressor of claim 13, wherein the first discharge passage is connected to the second suction passage, and therefore the fluid compressed in the first compression space is re-compressed in the second compression space.

16. The compressor of claim 15, wherein the cylinder assembly comprises a cylinder having the first and second suction passages, a first and a second bearing plates having the first and second discharge passages coupled to the upper and lower part of the cylinder respectively, and a first and second mufflers respectively installed outside of the first and second bearing plates for reducing the discharge noise of the fluid;

and the second suction passage is connected to inside of the first muffler and the second muffler has a discharge hole so that re-compressed fluid can be discharged outside.

17. The compressor of claim 16, wherein the second suction passage is formed penetrating the first bearing plate and the cylinder.

18. The compressor of claim 1, wherein a damping recesse having a certain depth is formed inside the compression space of the cylinder so that pressure pulsation generated during the process of compressing the fluid can be sucked therethrough.

19. The compressor of claim 18, wherein the damping recess is formed to be located within 180°

toward the rotation direction of the slant compression plate from the vane means.

20. The compressor of claim 18, wherein the damping recess is formed in all spaces divided by the slant compression plate respectively.

21. The compressor of claim 18, wherein the cylinder assembly comprises a cylinder, and a plurality of bearing plates forming the compression space by coupling to the upper and lower parts of the cylinder and at the same time, supporting the rotation driving means;

and the damping recesses are respectively formed on the bearing plates.

22. The compressor of claim 18, wherein the damping recess is formed as a circle or a oval shape.

23. The compressor of claim 18, wherein the damping recess is a recess having a plurality of steps of different inner diameters.

24. The compressor of claim 18, wherein the suction passage is formed on a position a certain distance apart from the upper or lower side surface of the compression space in the cylinder assembly, and the damping recess is formed to be opened toward the compression space from the suction passages to the upper or lower side surface of the compression space.

25. The compressor of claim 24, wherein the slant compression plate is formed as a sine wave having an upper dead center and a lower dead center adhered to the upper and lower side surfaces of the compression space, and thickness of the upper and lower dead centers is formed so as to block the suction passages.

26. The compressor of claim 24, wherein the damping recess is formed as a cylinder smaller than the inner diameter of the suction passage.

27. The compressor of claim 24, wherein the cylinder assembly comprises a cylinder, and a plurality of bearing plates forming the compression space by coupling to the upper and lower parts of the cylinder, and the damping recess is formed penetrating from the upper or lower part of the suction passage to the bottom or upper surface of the bearing plate.

28. The compressor of claim 1, wherein a discharge valve for opening/closing discharge of the compressed fluid is disposed on the discharge passage of the cylinder assembly.

29. The compressor of claim 1, wherein the cylinder assembly comprises a cylinder, and a plurality of bearing plates forming the compression space by coupling to the upper and lower parts of the cylinder;

and a discharge recess of emitted shape is formed at least on one outer circumferential surface of the cylinder, and the discharge passage is formed penetrating from the compression space to the discharge recess.

30. The compressor of claim 29, wherein a discharge valve for opening/closing the discharge passage is installed on the discharge recess.

31. The compressor of claim 1, wherein a flowing resistance reducing unit which is an emitted part is formed on inlet unit around the compression space of the cylinder so that the flowing resistance generated when the compressed fluid is discharged can be reduced.

32. The compressor of claim 31, wherein the flowing resistance reducing unit is slanted so as to face counterpart direction of the rotating direction of the slant compression plate.

33. The compressor of claim 31, wherein the flowing resistance reducing unit is formed as a recess having a plurality of steps which are narrowed toward the inside of the discharge passage.

34. The compressor of claim 31, wherein a center of the discharge passage is slanted as a certain angle against the rotating center of the slant compression plate.

35. The compressor of claim 1, wherein a plane of the slant compression plate is formed as a ring round disc form, and a side surface of the slant compression plate is formed as a sine wave having an upper dead center and a lower dead center which are adhered to the upper and lower side surfaces of the compression space.

36. The compressor of claim 35, wherein the upper and lower dead centers of the slant compression plate are formed to have a phase difference of 180°

.

37. The compressor of claim 35, wherein a certain horizontal line connecting the outer circumferential surface to the inner circumferential surface of the slant compression plate and the outer side surface of the rotation driving means in vertical direction make a right angle.

38. The compressor of claim 35, wherein the suction passages is formed to be contacted to the upper side surface or to the lower side surface of the compression space of the cylinder assembly, and the thickness of the part forming the upper and lower dead centers is formed to have the thickness by which the suction passage of the cylinder assembly can be blocked.

39. The compressor of claim 35, wherein the upper and lower dead centers of the slant compression plate are formed as curved surfaces so as to line contact to the upper and lower side surfaces of the compression space.

40. The compressor of claim 35, wherein the upper and lower dead centers are formed as plane surfaces so as to be contacted its surfaces to the upper and lower side surfaces of the compression space.

41. The compressor of claim 1, wherein a labyrinth seal of one or more recess as a band shape is formed on the outer circumferential surface of the slant compression plate which is slidingly contacted to the cylinder assembly so as to prevent the fluid from being leaked from the high pressure space to the lower pressure space by the pressure difference between the respective spaces which are divided by the slant compression plate.

42. The compressor of claim 1, wherein the vane means comprises vanes of square shape which are adhered to the slant compression plate inside the compression space of the cylinder assembly, and an elastic supporting means which is supported by the cylinder for supplying the elastic force so that the vanes can be adhered to the slant compression plate.

43. The compressor of claim 42, wherein a front end part of the vane is contacted to the slant compression plate and both side parts of the vane are contacted to the inner circumferential surface of the cylinder assembly and to the side surface of the rotation driving means, in the state that the vane is inserted into the upper or lower part of the cylinder so as to be undergone the reciprocating movement.

44. The compressor of claim 42, wherein the vanes are disposed to have a phase difference of 180°

on the cylinder assembly, and installed to be adhered to the upper side surface and to the lower side surface of the slant compression plate.

45. The compressor of claim 42, wherein the elastic supporting means comprises a spring retainer supported by the cylinder assembly, and a spring supported by the spring retainer for supplying the elastic force to the vanes.

46. The compressor of claim 42, wherein the vanes are respectively disposed on same vertical surface of the cylinder assembly and adhered to the upper and lower side surfaces of the slant compression plate.

47. The compressor of claim 46, wherein the cylinder assembly comprises a cylinder, and a first and second bearing plates forming the compression space by coupling to the upper and lower parts of the cylinder;

and vane slots are respectively formed on the first and second bearing plates so that the vanes are inserted therein and undergone the reciprocating movement.

48. The compressor of claim 46, wherein two discharge passages are formed toward the axial direction of the cylinder assembly, and some parts of the respective passages are overlapped with the side surface of the vanes.

49. The compressor of claim 46, wherein one suction passage is formed on the side wall of the cylinder assembly so that the fluid is sucked into the both compression spaces in turns according to the rotation of the slant compression plate.

50. The compressor of claim 46, wherein a spring penetration hole is formed on the cylinder assembly so that the elastic supporting means can be passed, and the elastic supporting means provides the elastic force by being connected to the vanes located on upper and lower sides of the slant compression plate through the spring penetration hole.

51. The compressor of claim 50, wherein the elastic supporting means comprises a connecting member fixed on the respective vanes, and a coil spring having both ends connected between the connecting member.

52. The compressor of claim 42, wherein the rotation driving means includes a rotating shaft for transmitting the rotation force to inside of the compression space;

and

one side surface of the vanes are formed as concave curved surfaces so as to be contacted the side surface to the outer circumferential surface of the rotating shaft.

53. The compressor of claim 52, wherein entire one side surface of the vane is formed as a curved surface.

54. The compressor of claim 52, wherein intermediate part of the vane is formed as a curved surface, and both sides of the vane are formed as plane surfaces.

55. The compressor of claim 42, wherein the other side surface of the vane is formed as a convex curved surface so as to be contacted the surface to the inner circumferential surface of the cylinder assembly.

56. The compressor of claim 42, wherein a contact curved surface unit is formed on a part of the vane which is contacted to the slant compression plate.

57. The compressor of claim 56, wherein the contact curved surface unit is formed to have radius of curvature which is gradually increased from the rotating center to the outer circumferential surface of the slant compression plate.

58. The compressor of claim 56, wherein the contact curved surface unit is formed as a curved surface by connecting tangent lines of circles which have radiuses of curvature which are gradually increased from the center line in length direction of the vane to farther positions from the center line.