Compressor having bypassing portion

Patent metadata

Field	Value
Publication number	US-11353027-B2
Application number	US-202016791511-A
Country	US
Kind code	B2
Filing date	Feb 14, 2020
Priority date	Feb 15, 2019
Publication date	Jun 7, 2022
Grant date	Jun 7, 2022

Abstract

A compressor includes a casing configured to accommodate refrigerant and oil, a discharger disposed at a side of the casing and configured to discharge the refrigerant, a driver including a stator and a rotor, a rotation shaft that is coupled to the rotor and that extends in a direction away from the discharger, a compressing assembly that is coupled to the rotation shaft, that is configured to be lubricated with the oil, and that is configured to compress the refrigerant and discharge the compressed refrigerant in the direction away from the discharger, a muffler coupled to the compressing assembly and configured to guide the refrigerant to the discharger, and a bypassing portion disposed outside the casing and configured to transfer the refrigerant or the oil from the muffler to the discharger.

First claim

What is claimed is:

1. A compressor comprising:
a casing that defines a reservoir space configured to store oil, the casing comprising a discharger disposed at a side of the casing and configured to discharge refrigerant;
a driver comprising:
a stator coupled to an inner circumferential surface of the casing and configured to generate a rotating magnetic field, and
a rotor accommodated in the stator and configured to rotate relative to the stator based on the rotating magnetic field;

a rotation shaft that is coupled to the rotor and that extends in a direction away from the discharger;
a compressing assembly that is coupled to the rotation shaft, that is configured to be lubricated with the oil, and that is configured to compress the refrigerant and discharge the compressed refrigerant in the direction away from the discharger;
a muffler coupled to the compressing assembly and configured to guide the refrigerant to the discharger;
a bypassing portion configured to transfer the refrigerant or the oil from the muffler to the discharger; and
a separator that is disposed between the discharger and the driver and that is configured to separate the oil from the refrigerant supplied to the discharger,
wherein the bypassing portion is configured to supply the refrigerant or the oil from the muffler to at least one of the separator or the discharger, and
wherein the bypassing portion is coupled to an outer circumferential surface of the casing and configured to discharge the refrigerant or the oil to a position between (i) a radial line that extends from the outer circumferential surface of the casing to the rotation shaft and (ii) a tangential line that is tangential to the outer circumferential surface of the casing.

2. The compressor of claim 1 , wherein the bypassing portion is coupled to the casing and configured to discharge the refrigerant or the oil into a position between a vertical level of the driver and a vertical level of the side of the casing at which the discharger is coupled.

3. The compressor of claim 2 , wherein the bypassing portion is coupled to the casing and configured to discharge the refrigerant or the oil into a space between the driver and a free end of the separator.

4. The compressor of claim 1 , wherein the muffler is configured to receive the refrigerant or the oil through the compressing assembly and the driver and to supply the refrigerant or the oil to the bypassing portion.

5. The compressor of claim 1 , wherein the bypassing portion comprises:
a first pipe coupled to the muffler;
a second pipe that is in communication with the first pipe, that is disposed outside of the casing, and that extends to the discharger; and
a third pipe that is in communication with the second pipe and that is coupled to the casing.

6. The compressor of claim 5 , wherein the first pipe passes through the casing.

7. The compressor of claim 6 , wherein the bypassing portion further comprises a muffler fastener that couples a distal end of the first pipe to the muffler.

8. The compressor of claim 7 , wherein the muffler fastener comprises a seat that is in contact with an inner wall of the muffler and that extends from an outer circumferential surface of the first pipe or is coupled to the first pipe.

9. The compressor of claim 7 , wherein the muffler fastener comprises a close contact portion that is in contact with an outer wall of the muffler and that extends from an outer circumferential surface of the first pipe or is coupled to the first pipe.

10. The compressor of claim 7 , wherein the muffler fastener comprises:
a seat that is in contact with an inner wall of the muffler and that extends from an outer circumferential surface of the first pipe or is coupled to the first pipe; and
a close contact portion that is in contact with an outer wall of the muffler and that extends from the outer circumferential surface of the first pipe or is coupled to the first pipe.

11. The compressor of claim 5 , wherein the muffler comprises:
a receiving body that defines a refrigerant flow space therein configured to receive the refrigerant and that defines an outlet hole configured to discharge the refrigerant to the first pipe; and
a coupling body that extends along an outer circumferential surface of the receiving body and that is coupled to the compressing assembly.

12. The compressor of claim 11 , wherein the receiving body comprises a guide that protrudes radially outward from the outer circumferential surface of the receiving body and that is configured to guide the refrigerant discharged from the compressing assembly to the discharger, and
wherein the outlet hole passes through the guide.

13. The compressor of claim 11 , wherein the coupling body defines a muffler collection channel that is recessed from an outer circumferential surface of the coupling body and that is configured to discharge the oil separated from the refrigerant toward the reservoir space, and
wherein the outlet hole is offset from the muffler collection channel and configured to discharge the refrigerant bypassing the muffler collection channel.

14. The compressor of claim 5 , wherein the bypassing portion further comprises a casing fastener that couples a distal end of the third pipe to the casing.

15. The compressor of claim 14 , wherein the casing fastener comprises a seat that is in contact with an inner wall of the casing and that extends from an outer circumferential surface of the third pipe or is coupled to the third pipe.

16. The compressor of claim 14 , wherein the casing fastener comprises a close contact portion that is in contact with an outer wall of the casing and that extends from an outer circumferential surface of the third pipe or is coupled to the third pipe.

17. The compressor of claim 14 , wherein the casing fastener comprises:
a seat that is in contact with an inner wall of the casing and that extends from an outer circumferential surface of the third pipe or is coupled to the third pipe; and
a close contact portion that is in contact with an outer wall of the casing and that extends from the outer circumferential surface of the third pipe or is coupled to the third pipe.

18. The compressor of claim 17 , wherein the bypassing portion further comprises:
a first connection pipe that extends from the first pipe, that is inclined with respect to the first pipe toward the discharger, and that is connected to the second pipe; and
a second connection pipe that extends from a distal end of the second pipe, that is inclined with respect to the second pipe toward the casing, and that is connected to the third pipe.

Assignees

• Lg Electronics Inc

Inventors

• Kim Taekyoung
• Lee Kangwook
• Kim Cheolhwan

Classifications

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C29/026 Primary

  Lubricant separation · CPC title

• F04C29/04

  Heating; Cooling (of machines or engines in general F01P); Heat insulation (heat insulation in general F16L59/00) · CPC title

• F05B2210/14

  Refrigerants with particular properties, e.g. HFC-134a · CPC title

• F04C29/124

  with inlet and outlet valves specially adapted for rotary or oscillating piston pumps · CPC title