Compressor

Patent metadata

Field	Value
Publication number	US-11566623-B2
Application number	US-202217834264-A
Country	US
Kind code	B2
Filing date	Jun 7, 2022
Priority date	Sep 5, 2018
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

Disclosed herein is a scroll compressor having a shaft balancer capable of attenuating vibration while preventing deformation of the rotary shaft during operation at a high speed.

First claim

What is claimed is:

1. A compressor comprising:
a case comprising a discharge portion that is disposed at one side of the case and configured to discharge a refrigerant;
a drive unit comprising:
a stator coupled to an inner circumferential surface of the case and configured to generate a magnetic field, and
a rotor accommodated in the stator and configured to be rotated based on the magnetic field;
a rotary shaft that extends through the rotor in a direction away from the discharge portion, the rotary shaft comprising an eccentric shaft that is arranged at one side of the rotary shaft and arranged thickly toward a part of the inner circumferential surface of the case;
a compression unit comprising:
an orbiting scroll coupled to the eccentric shaft and configured to perform an orbital movement based on rotation of the rotary shaft, and
a fixed scroll engaged with the orbiting scroll, the fixed scroll being configured to receive and compress the refrigerant;
a muffler coupled to the compression unit, the muffler being configured to guide the refrigerant to the discharge portion; and
a balancer coupled to at least one of the drive unit or the rotary shaft, the balancer being configured to offset or distribute a load of the eccentric shaft,
wherein the balancer comprises a shaft balancer that is rotatably coupled to the rotary shaft protruding from the compression unit in the direction away from the discharge portion, and
wherein the muffler comprises:
a coupling portion coupled to the fixed scroll,
an accommodation body that extends from the coupling portion and defines a space configured to receive the refrigerant therein, and
a recess that is recessed from one surface of the accommodation body toward the discharge portion, the recess accommodating the shaft balancer.

2. The compressor of claim 1 , wherein the shaft balancer comprises:
an eccentric portion coupled to the rotary shaft and configured to rotate together with the rotary shaft.

3. The compressor of claim 2 , wherein the eccentric portion comprises a load body having a plate shape, the load body defining:
a load through hole that penetrates through the load body and is coupled to the rotary shaft; and
a balancing portion recessed from a part of the load body.

4. The compressor of claim 3 , further comprising a cover that is coupled to the load body and covers the balancing portion.

5. The compressor of claim 1 , wherein the one surface of the accommodation body and an exposed surface of the shaft balancer are arranged parallel to each other.

6. The compressor of claim 5 , wherein the one surface of the accommodation body is flush with an exposed surface of the shaft balancer.

Assignees

• Lg Electronics Inc

Inventors

• Lee Seungmock
• Ha Jonghun
• Kim Cheolhwan

Classifications

• F04C29/065

  Noise dampening volumes, e.g. muffler chambers · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C2240/60

  Shafts · CPC title

• F04C29/0057 Primary

  for eccentric movement · CPC title

• F04C2240/30

  Casings or housings · CPC title