Hermetic compressor with cylinder having elliptical inner circumferential surface, roller, and at least one vane

Patent metadata

Field	Value
Publication number	US-RE50855-E
Application number	US-202217723766-A
Country	US
Kind code	E1
Filing date	Apr 19, 2022
Priority date	Dec 29, 2016
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

A hermetic compressor may include a cylinder having an elliptical inner circumferential surface; a roller eccentric from the inner circumferential surface; and at least one vane withdrawn towards the inner circumferential surface when the roller is rotated to divide a compression chamber space into compression chambers. On the basis of A first center line passes through a contact reference point where the inner circumferential surface of the cylinder and an outer circumferential surface of the roller are closest, a first center line passes and through a lateral center of an inner space of the cylinder, an . A first pair of ellipse segments are positioned at a first side of the first center line and forming form portions of the inner circumferential surfaceis a first ellipse, a . A center point of the first pair of ellipse segments is a first center point, an . A second pair of ellipse segments are positioned at a second side of the first center line and forming form portions of the inner circumferential surface is a second ellipse, a . A center point of the second pair of ellipse segments is a second center point, and the first center point and the second center point are spaced apart from the lateral center of the inner space of the cylinder.

First claim

What is claimed is:

1 . A hermetic compressor, comprising:
a cylinder having an inner circumferential surface, which forms bounds a compression chamber, formed in an elliptical shape space within the cylinder; a roller provided to be eccentric from the inner circumferential surface of the cylinder, and configured to change a volume of the compression chamber by being rotated; and at least one vane formed to be withdrawn towards the inner circumferential surface of the cylinder when the roller is rotated, and configured to divide the compression chamber space into a plurality of spaces compression chambers, wherein rotation of the roller and the at least one vane causes volumes of the plurality of compression chambers to change, wherein on the basis of with respect to a contact reference point where the inner circumferential surface of the cylinder and an outer circumferential surface of the roller are closest to each other, and a first center line passing through a lateral center of an inner space of the cylinder and the reference point, an a first pair of ellipse segments are positioned at a first side of the first center line and forming form respective portions of the inner circumferential surface of the cylinder is defined as a first ellipse, a center point of the first pair of ellipse segments is defined as a first center point, an a second pair of ellipse segments are positioned at a second side of the first center line and forming form respective portions of the inner circumferential surface of the cylinder is defined as a second ellipse, and a center point of the second pair of ellipse segments is defined as a second center point, the first center point and the second center point are spaced apart from the lateral center of the inner space of the cylinder, wherein the first center point and the second center point are positioned on the first center line, at different separation distances from the lateral center of the inner space of the cylinder, and wherein the first center point and the second center point are positioned on a same side, on the basis of a second center line passing through the lateral center of the inner space of the cylinder and perpendicular to the first center line.

2 . The hermetic compressor of claim 1 , wherein the first center point is farther from the lateral center of the inner space of the cylinder than the second center point.

3 . The hermetic compressor of claim 1 , wherein the first pair of ellipse segments is formed as two ellipses having a same sum of distances to two focal points for every point thereonellipse segments , and wherein an ellipse segment of the two ellipsesellipse segments positioned at a relatively short distance from the contactreference point thancompared to an ellipse segment of the two ellipsesellipse segments positioned at a relatively long distance from the contactreference point is formed such that a distance between two focal points thereon ishas a relatively largelarger eccentricity.

4 . The hermetic compressor of claim 1 , wherein the second pair of ellipse segments is formed as two ellipses having a same sum of distances to two focal points for every point thereonellipse segments, and wherein an ellipse segment of the two ellipsesellipse segments positioned at a relatively short distance from the contactreference point thancompared to an ellipse segment of the two ellipses ellipse segments positioned at a relatively long distance from the contact reference point is formed such that a distance between two focal points thereon is has a relatively large larger eccentricity.

5 . The hermetic compressor of claim 1 , wherein each of the first pair of ellipse segments and the second pair of ellipse segments is formed as two ellipses having a same sum of distances to two focal points for every point thereonellipse segments, wherein one of the ellipse segments of the first pair of ellipse segments positioned at a relatively short distance from the contactreference point thancompared to another of the ellipse segments of the first pair of ellipse segments positioned at a relatively long distance from the contactreference point is formed such that a distance between two focal points thereon ishas a relatively largelarger eccentricity, and wherein one of the ellipse segments of the second pair of ellipse segments positioned at a relatively short distance from the contactreference point thancompared to another of the ellipse segments of the second pair of ellipse segments positioned at a relatively long distance from the contactreference point is formed such that a distance between two focal points thereon ishas a relatively largelarger eccentricity.

6 . The hermetic compressor of claim 1 , wherein a line passing through the first center point in a direction perpendicular to the first center line is defined as a third center line, and a line passing through the second center point in a direction perpendicular to the first center line is defined as a fourth center line, a region of the first pair of ellipse segments is divided into first and second quadrants in a rotational direction of the roller by the first and third center lines such that the first pair of ellipse segments includes a first ellipse segment in the first quadrant and a second ellipse segment in the second quadrant, and a region of the second pair ellipse segments is divided into third and fourth quadrants by the first and fourth center lines such that the first pair of ellipse segments includes a first ellipse segment in the first quadrant and a second ellipse segment in the second quadrant, and wherein each ellipse segment of the ellipsesellipse segments in the four quadrants are formed to havehas a different distances between two focal points thereofeccentricity.

7 . The hermetic compressor of claim 6 , wherein the contactreference point is included in the first quadrant on the basis of the third center line, and wherein a distance between two focal pointsan eccentricity of anthe first ellipse segment in the first quadrant including the contact point is formed to be larger than a distance between two focal points an eccentricity of an the third ellipse segment in the second quadrant.

8 . The hermetic compressor of claim 6 , wherein the contactreference point is included in the fourth quadrant on the basis of the fourth center line, and wherein a distance between two focal pointsan eccentricity of anthe fourth ellipse segment in the fourth quadrant including the contact point is formed to be larger than a distance between two focal points of an ellipse in the third quadrant.

9 . The hermetic compressor of claim 1 , wherein a section having a same curvature radius as the roller is formed at a sealing section including the contactreference point along the inner circumferential surface of the cylinder.

10 . A hermetic compressor, comprising:
a cylinder having an inner circumferential surface, which forms bounds a compression chamber formed in an elliptical shape space within the cylinder; a roller provided to be eccentric from the inner circumferential surface of the cylinder, and configured to change a volume of the compression chamber by being be rotated; and at least one vane formed to be withdrawn towards the inner circumferential surface of the cylinder when the roller is rotated, and configured to divide the compression chamber space into a plurality of spaces compression chambers, wherein rotation of the roller and the at least one vane causes volumes of the plurality of compression chambers to changeswherein a position where the inner circumferential surface of the cylinder and an outer circumferential surface of the roller are closest to each other is at a contact reference point, a line pa

Assignees

• Lg Electronics Inc

Inventors

• Moon Seokhwan
• Kang Seoungmin
• Lee Byeongchul

Classifications

• F04C29/128

  of the elastic type, e.g. reed valves · CPC title

• F04C27/002

  of rigid material · CPC title

• F04C18/3441

  the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation · CPC title

• F04C2250/301

  compression chamber profile defined by a mathematical expression or by parameters · CPC title

• F01C21/106

  with a radial surface, e.g. cam rings · CPC title