Linear compressor

Patent metadata

Field	Value
Publication number	US-11725644-B2
Application number	US-202117381650-A
Country	US
Kind code	B2
Filing date	Jul 21, 2021
Priority date	Sep 18, 2020
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A linear compressor includes a cylinder that defines a compression space of a refrigerant and has a cylindrical shape, and a piston disposed in the cylinder and reciprocating along an axis of the cylinder. The cylinder includes a gas inlet on an outer circumferential surface and a supply port radially passing through the cylinder and communicating with the gas inlet. The gas inlet includes a first gas inlet and a second gas inlet disposed behind the first gas inlet, and the supply port includes a first supply port communicating with the first gas inlet and a second supply port disposed behind the first supply port and communicating with the second gas inlet. A flow rate passing through the first supply port is different from a flow rate passing through the second supply port.

First claim

What is claimed is:

1. A linear compressor comprising:
a cylinder that defines a compression space configured to receive refrigerant; and
a piston disposed in the cylinder and configured to reciprocate relative to the cylinder along an axial direction of the cylinder,
wherein the cylinder comprises:
a gas inlet defined at an outer circumferential surface of the cylinder and configured to supply at least a portion of the refrigerant toward the piston, the gas inlet comprising a first gas inlet, and a second gas inlet that is disposed rearward relative to the first gas inlet in the axial direction of the cylinder, and
a supply port that radially passes through the cylinder and is in fluid communication with the gas inlet, the supply port comprising a first supply port in fluid communication with the first gas inlet, and a second supply port that is spaced apart from the first supply port and in communication with the second gas inlet,

wherein the linear compressor further comprises:
a first restrictor disposed in the first gas inlet and configured to restrict flow of the refrigerant through the first gas inlet, and
a second restrictor disposed in the second gas inlet and configured to restrict flow of the refrigerant passing through the second gas inlet,

wherein a first flow rate of the refrigerant passing through the first supply port is different from a second flow rate of the refrigerant passing through the second supply port, and
wherein a height of the first restrictor in a radial direction of the cylinder is less than a height of the second restrictor in the radial direction of the cylinder.

2. The linear compressor of claim 1 , wherein the first flow rate is 0.65 to 0.8 times of a total flow rate passing through the first and second supply ports.

3. The linear compressor of claim 1 , wherein a volume of the first gas inlet is less than a volume of the second gas inlet.

4. The linear compressor of claim 1 , wherein an area of a top surface of the first gas inlet is less than an area of a top surface of the second gas inlet, the top surfaces of the first and second gas inlets being disposed at the outer circumferential surface of the cylinder.

5. The linear compressor of claim 1 , wherein an area of a bottom surface of the first gas inlet is less than an area of a bottom surface of the second gas inlet, the bottom surfaces of the first and second gas inlets being recessed relative to the outer circumferential surface of the cylinder.

6. The linear compressor of claim 1 , wherein a depth of the first gas inlet from the outer circumferential surface of the cylinder is less than a depth of the second gas inlet from the outer circumferential surface of the cylinder.

7. The linear compressor of claim 1 , wherein a height of the first supply port in a radial direction of the cylinder is less than a height of the second supply port in the radial direction of the cylinder.

8. The linear compressor of claim 1 , wherein a diameter of the first supply port is greater than a diameter of the second supply port.

9. A linear compressor comprising:
a cylinder that defines a compression space configured to receive refrigerant; and
a piston disposed in the cylinder and configured to reciprocate relative to the cylinder along an axial direction of the cylinder,
wherein the cylinder comprises:
a gas inlet defined at an outer circumferential surface of the cylinder and configured to supply at least a portion of the refrigerant toward the piston, the gas inlet comprising a first gas inlet, and a second gas inlet that is disposed rearward relative to the first gas inlet in the axial direction of the cylinder, and
a supply port that radially passes through the cylinder and is in fluid communication with the gas inlet, the supply port comprising a first supply port in fluid communication with the first gas inlet, and a second supply port that is spaced apart from the first supply port and in communication with the second gas inlet,

wherein the linear compressor further comprises:
a first restrictor disposed in the first gas inlet and configured to restrict flow of the refrigerant passing through the first gas inlet, and
a second restrictor disposed in the second gas inlet and configured to restrict flow of the refrigerant passing through the second gas inlet,

wherein a first flow rate of the refrigerant passing through the first supply port is different from a second flow rate of the refrigerant passing through the second supply port, and
wherein a density of the first restrictor is less than a density of the second restrictor.

10. The linear compressor of claim 1 , wherein a flow resistance of the first gas inlet is less than a flow resistance of the second gas inlet.

11. A linear compressor comprising:
a cylinder that defines a compression space configured to receive refrigerant; and
a piston disposed in the cylinder and configured to reciprocate relative to the cylinder along an axial direction of the cylinder,
wherein the cylinder comprises:
a gas inlet defined at an outer circumferential surface of the cylinder and configured to supply at least a portion of the refrigerant toward the piston, the gas inlet comprising a first gas inlet, and a second gas inlet that is disposed rearward relative to the first gas inlet in the axial direction of the cylinder, and
a supply port that radially passes through the cylinder and is in fluid communication with the gas inlet,

wherein a flow resistance of the first gas inlet is different from a flow resistance of the second gas inlet, and
wherein a volume of the first gas inlet is less than a volume of the second gas inlet.

12. The linear compressor of claim 11 , wherein the flow resistance of the first gas inlet is less than the flow resistance of the second gas inlet.

13. A linear compressor comprising:
a cylinder that defines a compression space configured to receive refrigerant; and
a piston disposed in the cylinder and configured to reciprocate relative to the cylinder along an axial direction of the cylinder,
wherein the cylinder comprises:
a gas inlet defined at an outer circumferential surface of the cylinder and configured to supply at least a portion of the refrigerant toward the piston, the gas inlet comprising a first gas inlet, and a second gas inlet that is disposed rearward relative to the first gas inlet in the axial direction of the cylinder, and
a supply port that radially passes through the cylinder and is in fluid communication with the gas inlet,

wherein a flow resistance of the first gas inlet is different from a flow resistance of the second gas inlet, and
wherein an area of a top surface of the first gas inlet is less than an area of a top surface of the second gas inlet, the top surfaces of the first and second gas inlets being disposed at the outer circumferential surface of the cylinder.

14. A linear compressor comprising:
a cylinder that defines a compression space configured to receive refrigerant; and
a piston disposed in the cylinder and configured to reciprocate relative to the cylinder along an axial direction of the cylinder,
wherein the cylinder comprises:
a gas inlet defined at an outer circumferential surface of the cylinder and configured to supply at least a portion of the refrigerant toward the piston, the gas inlet comprising a first gas inlet, and a second gas inlet that is disposed rearward relative to the first gas inlet in the axial direction of the cylinder, and
a supply port that radially passes through the cylinder and is in fluid communication with the gas inlet,

wherein a flow resistance of the first gas inlet is di

Assignees

• Lg Electronics Inc

Inventors

• Son Sangik
• Jeon Wooju
• Kim Donghan

Classifications

• F04B37/00 Primary

  Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 · CPC title

• F04B53/14

  Pistons, piston-rods or piston-rod connections · CPC title

• F04B53/16

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

• F04B39/123 Primary

  Fluid connections · CPC title

• F04B35/04 Primary

  the means being electric · CPC title