COMPRESSOR

• US 20200132084A1
• Filed: 10/30/2019
• Published: 04/30/2020
• Est. Priority Date: 10/30/2018
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: LEE, Kangwook, JEON, Nayoung, KIM, Cheolhwan
• Granted Patent: US 11,384,771 B2
• Time in Patent Office: Days
• CPC Class Codes: F04C 18/0215 where only one member is moving
• CPC Class Codes: F04C 23/008 Hermetic pumps
• CPC Class Codes: F04C 29/0028 Internal leakage control
• CPC Class Codes: F04C 29/028 Means for improving or restricting lubricant flow
• CPC Class Codes: F04D 29/046 Bearings
• CPC Class Codes: F04D 29/0462 Bearing cartridges
• CPC Class Codes: F04D 29/049 Roller bearings
• CPC Class Codes: F04D 29/063 specially adapted for elastic fluid pumps
• CPC Class Codes: F04D 29/08 Sealings
• CPC Class Codes: F04D 29/102 especially adapted for elastic fluid pumps
• CPC Class Codes: F04D 29/12 using sealing-rings
• CPC Class Codes: F04D 29/126 especially adapted for liquid pumps
• CPC Class Codes: F04D 29/626 Mounting or removal of fans
• CPC Class Codes: F04D 31/00 Pumping liquids and elastic fluids at the same time
• CPC Class Codes: F04D 5/00 Pumps with circumferential or transverse flow control thereof F04D15/005
• CPC Class Codes: F04D 5/002 Regenerative pumps for elastic fluids F04D23/008
• CPC Class Codes: F04D 5/007 Details of the inlet or outlet
• CPC Class Codes: F16J 15/34 with slip-ring pressed against a more or less radial face on one member

Abstract

There is disclosed a compressor comprising a case comprising a discharging part provided one side and configured to discharge a refrigerant, the case defining a predetermined space for storing oil; a drive part comprising a rotor coupled to an inner circumferential surface of the case and having coils wound there around and configured to generate a rotation magnetic field, and a rotor mounted in the rotor and configured to be rotatable by the rotation magnetic field; a shaft extending in a state of being coupled to the rotor; a compression part lubricated by the oil in a state of being coupled to the shaft and configured to compress and discharge the refrigerant; and a sealing part extending from the stator towards the compression part and configured to induce the winding of the coil.

Claims

1. A compressor comprising:

a case that defines an inner space configured to store oil and that comprises a discharging part disposed at one side of the case and configured to discharge refrigerant;

a drive part comprising a stator coupled to an inner circumferential surface of the case and configured to generate a magnetic field, coils wound around the stator, and a rotor mounted in the stator and configured to rotate relative to the stator based on the magnetic field;

a shaft that is coupled to the rotor and that extends along the rotor;

a compression part coupled to the shaft and configured to compress and discharge the refrigerant, the compression part being configured to be lubricated by the oil; and

a sealing part disposed between the drive part and the compression part and configured to block leakage of the refrigerant or the oil from a region between the drive part and the compression part; and

an insulator that extends from the stator toward the compression part, that is configured to guide winding of a portion of the coils therearound wherein the sealing part is disposed on inward of the insulator.

2. The compressor of claim 1, wherein the sealing part is made of a flexible member.

3. The compressor of claim 1, wherein the sealing part comprises:

a sealing body that extends along an inner circumferential surface of the insulator and that defines a flow hole configured to allow the oil and the refrigerant to pass therethrough.

4. The compressor of claim 3, wherein the sealing body is configured to contact the inner circumferential surface of the insulator based on the compression part discharging the refrigerant.

5. The compressor of claim 3, wherein the sealing body is configured to contact the inner circumferential surface of the insulator in a state in which the sealing body is spaced apart from the compression part.

6. The compressor of claim 3, wherein the stator comprises:

a fixed body coupled to the inner circumferential surface of the case, the insulator extending from the fixed body toward the compression part; and

a teeth portion that extends from the fixed body toward the rotor, a portion of the coils being wound around the teeth portion, and

wherein the sealing body is fixed at a position between the insulator and the portion of the coils wound around the teeth portion.

7. The compressor of claim 3, further comprising:

an oil guider comprising a guide rib that extends from the compression part toward the drive part and configured to block leakage of the oil or the refrigerant from the compression part,

wherein the sealing part covers a gap between the insulator and the guide rib.

8. The compressor of claim 7, wherein the guide rib extends from the compression part toward an end of the insulator, and

wherein the sealing part is disposed at an inner region of the guide rib facing the shaft.

9. The compressor of claim 8, wherein an inner circumferential surface of the insulator and an inner circumferential surface of the guide rib face the shaft and define a plane that extends parallel to the shaft, and

wherein the sealing part contacts both of the inner circumferential surface of the insulator and the inner circumferential surface of the guide rib.

10. The compressor of claim 7, wherein the guide rib extends from the compression part toward an inside of the insulator facing the shaft, and

wherein the sealing part is disposed radially between an outer circumferential surface of the guide rib and an inner circumferential surface of the insulator.

11. The compressor of claim 10, wherein the guide rib is spaced apart from the insulator and disposed radially inward of the insulator toward the shaft, and

wherein the sealing part contacts both of the outer circumferential surface of the guide rib and the inner circumferential surface of the insulator.

12. A compressor comprising:

a case that defines an inner space configured to store oil and that comprises a discharging part disposed at one side of the case and configured to discharge refrigerant;

a drive part comprising a stator coupled to an inner circumferential surface of the case and configured to generate a magnetic field, coils wound around the stator, and a rotor mounted in the stator and configured to rotate relative to the stator based on the magnetic field;

a shaft that is coupled to the rotor and that extends along the rotor;

a compression part coupled to the shaft and configured to compress and discharge the refrigerant, the compression part being configured to be lubricated by the oil;

an insulator that extends from the stator toward the compression part and that is configured to guide winding of a portion of the coils therearound;

an oil guider that extends from the compression part toward an end of the insulator or an inner circumferential surface of the insulator; and

a sealing part that covers a gap between the oil guider and the insulator and that is configured to block leakage of the oil or the refrigerant from the gap.

13. The compressor of claim 12, wherein the oil guider comprises:

a guide rib that extends from the compression part toward the end of the insulator and that is spaced apart from the end of the insulator.

14. The compressor of claim 13, wherein the sealing part comprises:

a sealing body that is detachably disposed at an inner circumferential surface of the insulator and that covers a space between the insulator and the guide rib, the sealing body defining a flow hole configured to allow the oil and the refrigerant to pass therethrough.

15. The compressor of claim 13, wherein the oil guider comprises a guider coupling portion coupled to the compression part, and the guide rib extends from the guider coupling portion toward the insulator.

16. The compressor of claim 13, wherein the guide rib is a part of the compression part.

17. The compressor of claim 12, wherein the shaft extends from the rotor in a direction away from the discharging part,

wherein the compression part is configured to discharge the refrigerant in the direction away from the discharging part, and

wherein the compressor further comprises a muffler coupled to the compression part and configured to guide the refrigerant toward the discharging part.

18. The compressor of claim 17, wherein the compression part defines a refrigerant path that extends from a bottom surface of the compression part toward the discharge part and that penetrates through the compression part, and

wherein the muffler comprises a guide surface that is spaced apart from the bottom surface of the compression part and that is configured to guide the refrigerant toward the discharging part through the refrigerant path.

19. The compressor of claim 12, wherein the sealing part is disposed radially inward of the insulator and contacts an inner circumferential surface of the insulator.

20. The compressor of claim 12, wherein the stator comprises:

a fixed body coupled to the inner circumferential surface of the case, the insulator extending from the fixed body toward the compression part; and

a teeth portion that extends from the fixed body toward the rotor,

wherein the coils comprise a first portion that is wound around the teeth portion and a second portion that is wound around the insulator, and

wherein the sealing part is fixed at a position between the insulator and the first portion of the coils.