Linear compressor

Patent metadata

Field	Value
Publication number	US-9890779-B2
Application number	US-201514644988-A
Country	US
Kind code	B2
Filing date	Mar 11, 2015
Priority date	Jun 24, 2014
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

A linear compressor is provided. The linear compressor may include a shell including a suction inlet, a cylinder provided in the shell to define a compression space for a refrigerant, a piston reciprocated in an axial direction within the cylinder, a discharge valve provided at one side of the cylinder to selectively discharge the refrigerant compressed in the compression space, and at least one nozzle, through which at least a portion of the refrigerant discharged through the discharge valve may flow, the at least one nozzle being disposed in the cylinder. The at least one nozzle may include an inlet, through which the refrigerant may be introduced, and an outlet having a diameter less than a diameter of the inlet.

First claim

What is claimed is:

1. A linear compressor, comprising:
a shell;
a cylinder provided in the shell to define a compression space for a refrigerant;
a piston reciprocated in an axial direction within the cylinder;
discharge valve provided at one end of the cylinder to selectively discharge the refrigerant compressed in the compression space;
plurality of gas inflows recessed from outer circumferential surface the cylinder, wherein a filter is installed in each of the plurality of gas inflows; and
a plurality of nozzles that extends, respectively, from each of the plurality of gas inflows toward an inner circumferential surface of the cylinder, wherein each of the plurality of nozzles has a cross-sectional area that gradually decreases with respect to a flow direction of the refrigerant, wherein each of the plurality of gas inflows has a ring shape, wherein the filter comprises a thread formed of polyethylene terephthalate (PET) material, and wherein the thread is arranged to be wound multiple times in the respective gas inflow.

2. The linear compressor according to claim 1 , wherein each of the plurality of nozzles comprises:
an inlet connected to the respective gas inflow; and
an outlet at the inner circumferential surface of the cylinder.

3. The linear compressor according to claim 2 , wherein a diameter of the outlet is less than a diameter of the inlet.

4. The linear compressor according to claim 3 , wherein the diameter of the inlet is greater than two times the diameter of the outlet.

5. The linear compressor according to claim 1 , wherein the plurality of nozzles is distributed along circumference of the cylinder.

6. The linear compressor according to claim 1 , wherein the plurality of nozzle comprises a plurality of sets of nozzles distributed along a length of the cylinder.

7. The linear compressor according to claim 6 , wherein a larger number of nozzles is provided on a discharge side with respect to a central portion of the cylinder than on a suction side.

Assignees

• Lg Electronics Inc

Inventors

• Ahn Kwangwoon
• Kim Donghan
• Ha Seongho

Classifications

• F04B53/008

  Spacing or clearance between cylinder and piston · CPC title

• F04B53/20

  Filtering · CPC title

• F04B39/0292

  Lubrication of pistons or cylinders · CPC title

• F04B39/122

  Cylinder block · CPC title

• F04B39/041

  sealing for a reciprocating rod (sealing in general F16J) · CPC title