Rotary compressor

Patent metadata

Field	Value
Publication number	US-10731650-B2
Application number	US-201715831104-A
Country	US
Kind code	B2
Filing date	Dec 4, 2017
Priority date	Mar 15, 2017
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

A rotary compressor includes: a shell defining an internal space; a driving motor arranged in the internal space of the shell; and a compression mechanism unit to receive power of the driving motor and compress refrigerant, wherein the compression mechanism unit includes: a cylinder defining a chamber in which the refrigerant is compressed; a rotary shaft connected to the driving motor; a roller located in the chamber and connected to the rotary shaft to compress the refrigerant in the chamber while being rotated; a bearing coupled to the cylinder and having a discharge port through which the refrigerant compressed in the chamber passes; a muffler coupled to the bearing and into which the refrigerant passing through the discharge port is introduced; and a noise reducing unit fixed to the muffler to define a noise reducing chamber together with the muffler.

First claim

What is claimed is:

1. A rotary compressor comprising:
a shell having a cavity formed therein;
a drive motor provided inside the cavity; and
a compression unit to compress a refrigerant, the compression unit being powered by the driving motor,
wherein the compression unit comprises:
a cylinder having a chamber formed therein in which the refrigerant is compressed;
a rotary shaft connected to the drive motor;
a roller provided in the chamber and connected to the rotary shaft to compress the refrigerant in the chamber;
a bearing coupled to the cylinder, the bearing having a discharge port through which the refrigerant that is compressed in the chamber passes;
a muffler coupled to the bearing and which receives the refrigerant that has passed through the discharge port; and
a noise reducing unit attached to the muffler to define a noise reducing chamber together with the muffler,
wherein the noise reducing unit comprises a chamber defining body that defines the noise reducing chamber,
wherein the chamber defining body is coupled to the muffler and surrounds a circumference of the rotary shaft,
wherein the chamber defining body comprises an inner side surface and an outer side surface,
wherein each of the inner side surface and the outer side surface comprises a plurality of concave portions and a plurality of convex portions when viewed from above, and
wherein the plurality of concave portions and the plurality of convex portions of each of the inner side surface and the outer side surface are alternately arranged.

2. The rotary compressor of claim 1 , wherein a cross-sectional area of the noise reducing chamber is greater than a cross-sectional area of the discharge port.

3. The rotary compressor of claim 1 , wherein the noise reducing unit is fixed to an outer side of the muffler, wherein the muffler comprises an opening through which noise and the refrigerant pass, and
wherein the noise reducing unit comprises an outlet through which the refrigerant introduced into the noise reducing unit passes.

4. The rotary compressor of claim 3 , wherein the muffler comprises an outlet through which the refrigerant passes.

5. The rotary compressor of claim 1 , wherein the muffler comprises an internal space and the noise reducing unit is located inside the internal space of the muffler,
wherein the noise reducing unit comprises an inlet through which noise and the refrigerant pass, and
wherein the muffler comprises an outlet through which the refrigerant having flowed through the noise reducing unit passes.

6. The rotary compressor of claim 5 , wherein the volume of the noise reducing unit subtracted from the volume of the internal space of the muffler is greater than the volume of the noise reducing chamber.

7. The rotary compressor of claim 5 , wherein the muffler comprises a second outlet through which refrigerant not introduced into the noise reducing unit passes.

Assignees

• Lg Electronics Inc

Inventors

• KU Sejin
• Park Hyungjin
• Byun Sangmyung
• Jin Gyeongsu

Classifications

• F04C29/065 Primary

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

• F04B39/0066

  using sidebranch resonators, e.g. Helmholtz resonators · CPC title

• F04B39/0061

  using muffler volumes · CPC title

• F04C29/061

  Silencers using overlapping frequencies, e.g. Helmholtz resonators · CPC title

• F04C18/02 Primary

  of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents · CPC title