Rotary compressor, method of manufacturing a rotary compressor, and apparatus for manufacturing a rotary compressor

Patent metadata

Field	Value
Publication number	US-10047748-B2
Application number	US-201514591410-A
Country	US
Kind code	B2
Filing date	Jan 7, 2015
Priority date	Jan 9, 2014
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

A rotary compressor, a method of manufacturing a rotary compressor, and an apparatus for manufacturing a rotary compressor are provided. The rotary compressor may include a case having an inner space, a stator to which power may be applied, the stator being disposed in the case, and a compression mechanism disposed on or at one side of the stator to generate a compression force of a refrigerant. The compression mechanism may include a rotational shaft, a cylinder that accommodates a roller coupled to the rotational shaft, a main bearing coupled a first side of the cylinder, and a sub bearing coupled to a second side of the cylinder. The main bearing may be press-fitted and fixed to an inner surface of the case.

First claim

What is claimed is:

1. A rotary compressor, comprising:
a case having an inner space;
a stator to which power is applied, the stator being disposed in the case; and
a compression mechanism disposed adjacent the stator to generate a compression force of a refrigerant, wherein the compression mechanism comprises:
a rotational shaft;
a cylinder that accommodates a roller coupled to the rotational shaft;
a main bearing coupled to a first side of the cylinder, the main bearing being press-fitted and fixed to an inner circumferential surface of the case; and
a sub bearing coupled to a second side of the cylinder, wherein the main bearing comprises:
a bearing body having a shaft through hole through which the rotational shaft passes, the bearing body comprising a valve installation portion having a recessed shape to allow a discharge valve to be seated thereon and in which a discharge hole, through which a compressed refrigerant is discharged, is defined; and
first and second deformation prevention portions that vertically pass through the main bearing to prevent the main bearing from being deformed while the main bearing is press-fitted, wherein the discharge valve comprises a valve body that selectively covers the discharge hole and a coupling portion that couples the valve body to the valve installation portion, and wherein a sum of a first angle formed by a first pair of lines that connects a center of the main bearing to both ends of the first deformation prevention portion and a second angle formed by a second pair of lines that connects the center of the main bearing to both ends of the second deformation prevention portion is greater than an angle formed by lines that connect the center of the main bearing to the discharge hole and the coupling portion.

2. The rotary compressor according to claim 1 , wherein the main bearing further comprises:
at least one press-fit portion that defines at least a first portion of an outer circumferential surface of the main bearing, the at least one press-fit portion being press-fitted to the inner circumferential surface of the case.

3. The rotary compressor according to claim 2 , wherein the main bearing further comprises at least one non-contact portion that defines a second portion of the outer circumferential surface of the main bearing and spaced apart from the inner circumferential surface of the case.

4. The rotary compressor according to claim 1 , wherein a virtual line that passes from the center of the main bearing to a center of the discharge hole contacts the at least one non-contact portion.

5. The rotary compressor according to claim 3 , wherein the at least one non-contact portion has a length longer than a length of a line that connects the a center of the discharge hole to a center of the coupling portion.

6. The rotary compressor according to claim 2 , wherein the at least one press-fit portion comprises a plurality of the press-fit portions provided spaced apart from each other, and wherein a non-contact portion is defined between adjacent press-fit portions.

7. The rotary compressor according to claim 1 , wherein the sub bearing comprises at least one sub press-fit portion which is press-fitted and fixed to the inner circumferential surface of the case.

8. The rotary compressor according to claim 1 , wherein the first deformation prevention portion has a size greater than a size of the valve installation portion.

9. The rotary compressor according to claim 1 , wherein the second deformation prevention portion has a size greater than a size of the valve installation portion.

10. The rotary compressor according to claim 2 , wherein the first deformation prevention portion is defined inside the at least one press-fit portion in a radial direction.

11. The rotary compressor according to claim 10 , wherein the main bearing further comprises at least two press-fit portions that define at least a first portion of an outer circumferential surface of the main bearing, the at least two press-fit portions being press-fitted to the inner circumferential surface of the case, and wherein the second deformation prevention portion is defined inside of one of the at least two press-fit portions in a radial direction.

12. The rotary compressor according to claim 1 , wherein the valve installation portion has a depth less than a predetermined depth to prevent the discharge of the compressed refrigerant from being restricted.

Assignees

• Lg Electronics Inc

Inventors

• Son Youngboo
• Ha Jonghun
• Lee Seungmock

Classifications

• F04C23/008 Primary

  Hermetic pumps · CPC title

• F04C29/0042

  Driving elements, brakes, couplings, transmissions specially adapted for pumps (brakes, couplings, transmissions per se F16, B60) · CPC title

• F04C18/00

  Rotary-piston pumps specially adapted for elastic fluids (with fluid ring or the like F04C19/00; rotary-piston pumps in which the working-fluid is exclusively displaced by one or more reciprocating pistons F04B) · CPC title

• F04C11/008 Primary

  Enclosed motor pump units · CPC title

• Y10S417/902

  Hermetically sealed motor pump unit · CPC title