Rotary compressor

Patent metadata

Field	Value
Publication number	US-11746783-B2
Application number	US-202117181076-A
Country	US
Kind code	B2
Filing date	Feb 22, 2021
Priority date	Jul 3, 2020
Publication date	Sep 5, 2023
Grant date	Sep 5, 2023

Abstract

A rotary compressor is provided that may include a rotational shaft, first and second bearings configured to support the rotational shaft in a radial direction, a cylinder disposed between the first and second bearings to form a compression space, a rotor disposed in the compression space and coupled to the rotational shaft to compress a refrigerant as the rotor rotates, and at least one vane slidably inserted into the rotor, the at least one vane coming into contact with an inner peripheral surface of the cylinder to separate the compression space into a plurality of regions. The at least one vane may include a pin that extends in an axial direction, and at least one of the first bearing and the second bearing may include a rail groove into which the pin may be inserted.

First claim

What is claimed is:

1. A rotary compressor, comprising:
a rotational shaft;
first and second bearings configured to support the rotational shaft in a radial direction;
a cylinder disposed between the first and second bearings to form a compression space;
a rotor disposed in the compression space and coupled to the rotational shaft to compress a refrigerant as the rotor rotates; and
at least one vane slidably inserted into the rotor, the at least one vane coming into contact with an inner peripheral surface of the cylinder to separate the compression space into a plurality of regions, wherein the at least one vane comprises a pin that extends in an axial direction, wherein at least one of the first bearing or the second bearing comprises a rail groove into which the pin is inserted, wherein a distal end surface of the at least one vane comprises a chamfer formed on an edge, the chamfer being a cut-away straight sloping surface, and wherein an angle between the chamfer and a longitudinal virtual line of the at least one vane is 70° to 90°.

2. The rotary compressor of claim 1 , wherein the distal end surface of the at least one vane is coaxial with the inner peripheral surface of the cylinder in an angle range from 40° to 160° in a rotational direction based on a suction completion point.

3. The rotary compressor of claim 1 , wherein an angle between the longitudinal virtual line of the at least one vane and a straight line that passes through a center of the distal end surface of the at least one vane and a center of the rotor is 5° to 20°.

4. The rotary compressor of claim 1 , wherein a radius of curvature of the distal end surface of the at least one vane facing the inner peripheral surface of the cylinder is smaller than an inner diameter of the cylinder in an angle range from 40° to 160° in a rotational direction based on a suction completion point.

5. The rotary compressor of claim 1 , wherein the edge on which the chamfer is formed is an edge in a direction opposite to the rotational direction of edges of the distal end surface of the at least one vane.

6. The rotary compressor of claim 1 , wherein a length of the chamfer in a direction perpendicular to the longitudinal virtual line is equal to or less than half of a width of the at least one vane.

7. The rotary compressor of claim 1 , wherein at least one of the rail groove or the inner peripheral surface of the cylinder is formed in a circular shape.

Assignees

• Lg Electronics Inc

Inventors

• Seol Seseok
• Kang Seoungmin
• Sa Bumdong

Classifications

• F04C18/344 Primary

  with vanes reciprocating with respect to the inner member · CPC title

• F04C29/0028

  Internal leakage control · CPC title

• F01C21/0809 Primary

  Construction of vanes or vane holders · CPC title

• F04C23/008

  Hermetic pumps · CPC title

• F01C21/102

  Adjustment of the interstices between moving and fixed parts of the machine by means other than fluid pressure · CPC title