Reciprocating compressor

Patent metadata

Field	Value
Publication number	US-11208991-B2
Application number	US-201916456927-A
Country	US
Kind code	B2
Filing date	Jun 28, 2019
Priority date	Jun 29, 2018
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

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 that defines a compression space configured to receive refrigerant; and
a discharge unit that defines a discharge space configured to receive the refrigerant discharged from the compression space,
wherein the discharge unit comprises:
a discharge cover that defines an inner space therein, and
a discharge plenum that is disposed in the inner space of the discharge cover, and

wherein the discharge plenum comprises:
a plenum flange that extends radially and is in contact with an inner side surface of the discharge cover,
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 from an outer side end of the plenum flange toward the inner space of the discharge cover in a direction away from the cylinder and that is disposed in the inner space of the discharge cover, the plenum guide surface being in contact with the inner side surface of the discharge cover.

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

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 side of the cylinder, the axial side facing the compression space;
a valve spring coupled to the discharge valve; and
a spring support part located at a radial outer side of the valve spring and configured to support the valve spring, and
wherein the plenum seating part comprises:
a first plenum seating part that extends axially 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 a 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 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 extends axially from an inner end in the radial direction of the second plenum body to thereby define a flow path configured to guide the refrigerant.

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

9. The linear compressor of claim 1 , wherein the plenum flange divides the discharge space into a first discharge space and a second discharge space that are spaced apart from each other in an axial direction, and
wherein the plenum seating part, the plenum body, the plenum extension part, and the plenum guide surface are disposed in the first discharge space.

10. The linear compressor of claim 9 , wherein at least one of the plenum guide surface of the discharge plenum or the inner side surface of the discharge cover defines a bearing guide groove configured to guide the refrigerant from the first discharge space to the second discharge space.

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 first discharge space is divided into a plurality of discharge chambers comprising:
a first discharge chamber;
a second discharge chamber that is defined at a side of the first discharge chamber; and
a third discharge chamber that is defined 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 the inner side surface of the discharge cover defines a bearing guide groove configured to guide the refrigerant from the third discharge chamber to the second discharge space.

16. The linear compressor of claim 1 , wherein the plenum guide surface is an outer circumferential surface of the discharge plenum, and the inner side surface of the discharge cover is an inner circumferential surface of the discharge cover.

17. The linear compressor of claim 1 , wherein an inner diameter of the discharge cover defined by the inner side surface of the discharge cover is equal to an outer diameter of the discharge plenum defined by the plenum guide surface.

18. A linear compressor comprising:
a cylinder that defines a compression space configured to receive refrigerant;
a frame disposed radially outside the cylinder; and
a discharge unit that defines a discharge space configured to receive the refrigerant discharged from the compression space,
wherein the discharge unit comprises:
a discharge cover that is coupled to the frame and defines an inner space therein, and
a discharge plenum that is disposed in the inner space of the discharge cover and divides the discharge space into a plurality of discharge spaces, and

wherein the discharge plenum comprises:
a plenum flange that extends radially and is in contact with an inner side surface of the discharge cover, and
a plenum guide surface that extends from an outer side end of the plenum flange toward the inner space of the discharge cover in a direction away from the cylinder and that is disposed in the inner space of the discharge cover, the plenum guide surface being in contact with the inner side surface of the discharge cover.

19. The linear compressor of claim 18 , wherein the discharge cover a

Assignees

• Lg Electronics Inc

Inventors

• Noh Kiwon
• Lee Kyunyoung

Classifications

• F04B39/125

  Cylinder heads · CPC title

• F04B39/0061

  using muffler volumes · CPC title

• F04B39/06

  Cooling; Heating; Prevention of freezing · CPC title

• F25B2400/073

  Linear compressors · CPC title

• F04B39/102

  the members being disc valves · CPC title