Reciprocating compressor

Patent metadata

Field	Value
Publication number	US-2020003198-A1
Application number	US-201916456927-A
Country	US
Kind code	A1
Filing date	Jun 28, 2019
Priority date	Jun 29, 2018
Publication date	Jan 2, 2020
Grant date	—

Abstract

Disclosed is a linear compressor. The linear compressor according to the spirit of the present invention includes a cylinder forming a compression space for refrigerant and a discharge unit forming a discharge space for refrigerant into which refrigerant discharged from the compression space flows. The discharge unit includes a discharge cover having an inner space formed therein and a discharge plenum placed in the inner space. In this case, the discharge plenum includes a plenum flange extending radially, a plenum seating part, a plenum body, and a plenum extension part which extend from a radially inner side end of the plenum flange, and a plenum guide surface extending from a radially outer side end of the plenum flange toward the inner space.

First claim

What is claimed is:

1 . A linear compressor comprising:
a cylinder forming a compression space for refrigerant; and a discharge unit that defines a discharge space into which the refrigerant that is discharged from the compression space is configured to flow, wherein the discharge unit comprises:
a discharge cover that has an inner space formed therein; and
a discharge plenum that is disposed in the inner space of the discharge cover,
wherein the discharge plenum of the discharge unit comprises:
a plenum flange that extends radially;
a plenum seating part, a plenum body, and a plenum extension part that extend radially from an inner side end of the plenum flange; and
a plenum guide surface that extends radially from an outer side end of the plenum flange toward the inner space of the discharge cover.

2 . The linear compressor of claim 1 ,
wherein the plenum flange of the discharge plenum of the discharge unit extends radially such that the outer side end of the plenum flange is in contact with the inner space of the discharge cover of the discharge unit, and wherein the plenum guide surface of the discharge plenum of the discharge unit extends axially upward from the outer side end of the plenum flange.

3 . The linear compressor of claim 1 , further comprising a discharge valve assembly that is configured to discharge, to the discharge space, the refrigerant that is compressed in the compression space,
wherein the plenum seating part of the discharge plenum of the discharge unit extends radially inward from the plenum flange such that the discharge valve assembly is seated thereon.

4 . The linear compressor of claim 3 ,
wherein the discharge valve assembly comprises:
a discharge valve that is located at an axial front side of the cylinder;
a valve spring that is located at an axial front side of the discharge valve and that is configured to be fixedly coupled to the discharge valve; and
a spring support part that is located at a radial outer side of the valve spring and that is configured to support the valve spring, and
wherein the plenum seating part of the discharge plenum of the discharge unit comprises:
a first plenum seating part that extends axially forward from the plenum flange of the discharge plenum along a radial outer side surface of the spring support part of the discharge valve assembly; and
a second plenum seating part that extends radially inward from the first plenum seating part along an axial front surface of the spring support part of the discharge valve assembly.

5 . The linear compressor of claim 1 ,
wherein the discharge cover of the discharge unit comprises a partition sleeve that extends axially to partition the inner space of the discharge cover into an inner side and an outer side along a radial direction, wherein the plenum seating part of the discharge plenum of the discharge unit extends radially inward from the plenum flange to axially contact the partition sleeve of the discharge cover of the discharge unit, and wherein the plenum body of the discharge plenum of the discharge unit extends radially inward from the plenum seating part to radially contact the partition sleeve of the discharge cover of the discharge unit.

6 . The linear compressor of claim 5 , wherein the plenum body of the discharge plenum of the discharge unit comprises:
a first plenum body that extends axially forward from the plenum seating part along a radial inner side surface of the partition sleeve; and a second plenum body that extends radially inward from the first plenum body.

7 . The linear compressor of claim 6 , wherein the plenum extension part of the discharge plenum of the discharge unit extends axially backward from an inner side end in radial direction of the second plenum body to form a flow path through which the refrigerant flows.

8 . The linear compressor of claim 5 ,
wherein the partition sleeve of the discharge cover of the discharge unit is radially spaced apart from an inner side surface of the discharge cover, and wherein the plenum guide surface of the discharge plenum of the discharge unit is configured to contact the inner side surface of the discharge cover and is radially spaced apart from the partition sleeve of the discharge cover.

9 . The linear compressor of claim 1 ,
wherein the plenum flange of the discharge plenum of the discharge unit is divided into (i) an upper space located at an upper side of the plenum flange, and (ii) a lower space located at a lower side of the plenum flange in an axial direction, and wherein the plenum seating part, the plenum body, the plenum extension part, and the plenum guide surface of the discharge plenum of the discharge unit are disposed in the upper space of the plenum flange of the discharge plenum.

10 . The linear compressor of claim 9 , wherein at least one of the plenum guide surface of the discharge plenum or an inner side surface of the discharge cover defines a bearing guide groove through which the refrigerant flows from the upper space to the lower space of the plenum flange of the discharge plenum of the discharge unit.

11 . The linear compressor of claim 10 , wherein the bearing guide groove is radially recessed outward from the inner side surface of the discharge cover.

12 . The linear compressor of claim 10 , wherein the bearing guide groove is radially recessed inward from an outer side surface of the plenum guide surface of the discharge plenum of the discharge unit.

13 . The linear compressor of claim 10 , wherein the bearing guide groove is formed to pass through the plenum guide surface of the discharge plenum of the discharge unit.

14 . The linear compressor of claim 9 ,
wherein the upper space of the plenum flange of the discharge plenum of the discharge unit is divided into a plurality of discharge spaces, and wherein the plurality of discharge spaces comprises:
a first discharge chamber;
a second discharge chamber that is located at a front side of the first discharge chamber; and
a third discharge chamber that is located at a radial outer side of the first discharge chamber and the second discharge chamber.

15 . The linear compressor of claim 14 , wherein at least one of the plenum guide surface of the discharge plenum or an inner side surface of the discharge cover defines a bearing guide groove through which the refrigerant flows from the third discharge chamber to the lower space of the plenum flange of the discharge plenum.

16 . A linear compressor comprising:
a cylinder that is configured to form a compression space for refrigerant; a frame that is accommodated inside the cylinder; and a discharge unit that forms a discharge space into which the refrigerant that is discharged from the compression space flows, wherein the discharge unit comprises:
a discharge cover that is coupled to the frame; and
a discharge plenum that is coupled to an inside of the discharge cover to form a plurality of discharge spaces,
wherein the discharge plenum comprises a plenum guide surface that is configured to contact an inner side surface of the discharge cover.

17 . The linear compressor of claim 16 ,
wherein the discharge cover of the discharge unit comprises an inner space that has a cylindrical shape with an inner diameter R in a radial direction and extending along an axial direction, and wherein an outer side surface of the plenum guide surface of the discharge plenum of the discharge unit has a cylindrical shape with the inner diameter R and extending along the axial direction.

Assignees

• Lg Electronics Inc

Inventors

• Noh Kiwon
• Lee Kyunyoung

Classifications

• F04B39/12

  Casings; Cylinders; Cylinder heads; Fluid connections · CPC title

• F04B35/04 Primary

  the means being electric · CPC title

• F04B39/06

  Cooling; Heating; Prevention of freezing · CPC title

• F04B35/045 Primary

  using solenoids · CPC title

• F04B39/102

  the members being disc valves · CPC title