Scroll compressor

Patent metadata

Field	Value
Publication number	US-9371832-B2
Application number	US-201213401402-A
Country	US
Kind code	B2
Filing date	Feb 21, 2012
Priority date	Jul 1, 2011
Publication date	Jun 21, 2016
Grant date	Jun 21, 2016

Abstract

A scroll compressor including a fixed scroll having a fixed wrap; and an orbiting scroll having an orbiting wrap engaged with the fixed wrap to form compression chambers, and performing an orbital motion with respect to the fixed scroll, wherein at least one of the fixed wrap and the orbiting wrap has a first constant section, a variable section, and a second constant section consecutively formed in a direction from a wrap final end to a wrap initial end.

First claim

The invention claimed is:

1. A scroll compressor, comprising:
a fixed scroll having a fixed wrap; and
an orbiting scroll having an orbiting wrap engaged with the fixed wrap to form compression chambers, and the orbiting scroll performing an orbital motion with respect to the fixed scroll,
wherein the fixed wrap and the orbiting wrap comprise a plurality of sections including a first constant section formed as an involute curve and with a wrap thickness that is constant in a lengthwise direction, a second constant section formed as an involute curve and with a wrap thickness that is constant in the lengthwise direction, and a variable section formed as a smooth transition curve between the first constant section and the second constant section and with a wrap thickness that increases in the lengthwise direction,
wherein the first constant section, the variable section and the second constant section are consecutively formed in a direction from a wrap final end to a wrap initial end,
wherein the first constant section is formed from the wrap final end to a predetermined crank angle, the variable section is formed from an end of the first constant section to a predetermined crank angle, and the second constant section is formed from an end of the variable section to the wrap initial end,
wherein the wrap thickness of the first constant section is smaller than that of the second constant section, and
wherein the wrap thickness of the variable section is continuously increased along an entire length of the variable section between the first constant section and the second constant section.

2. The scroll compressor of claim 1 , wherein the fixed wrap and the orbiting wrap are formed by combining a plurality of curves originating at a center of a circle but extending out to different positions along the radius of the circle with respect to one another.

3. The scroll compressor of claim 1 , wherein each of the fixed wrap and the orbiting wrap is formed as an involute curve originating at a center of a circle but extending out to different positions along the radius of the circle.

4. A scroll compressor, comprising:
a fixed scroll having a fixed wrap; and
an orbiting scroll having an orbiting wrap engaged with the fixed wrap to form compression chambers, and configured to perform an orbital motion with respect to the fixed scroll,
wherein each of the fixed wrap and the orbiting wrap has at least two constant sections with respective constant wrap thicknesses, including:
a first constant section positioned at a suction side, and
a second constant section positioned at a discharge side,
wherein a variable section, with a wrap thickness that is increased toward the second constant section, is disposed between the first constant section and the second constant section,
wherein an outside surface of the variable section is formed as a first involute curve and an inside surface of the variable section is formed as a second involute curve, and
wherein each of the first involute curve and the second involute curve is formed by separate respective involute curves originating at a center of a circle but extending out to different positions along the radius of the circle with respect to one another.

5. The scroll compressor of claim 4 , wherein each of the fixed wrap and the orbiting wrap is formed by combining a plurality of curves originating at the center of the circle but extending out to different positions along the radius of the circle with respect to one another.

6. The scroll compressor of claim 4 , wherein a minimum wrap thickness at the variable section is equal to the wrap thickness at the first constant section, and a maximum wrap thickness at the variable section is equal to the wrap thickness at the second constant section.

7. The scroll compressor of claim 4 , wherein the fixed wrap and the orbiting wrap are formed as an involute curve originating at the center of the circle but extending out to different positions along the radius of the circle.

8. A scroll compressor, comprising:
a fixed scroll having a fixed wrap which forms an outside fixed scroll surface curve and an inside fixed scroll surface curve, at least one curve formed as two curves originating at a center of a circle but extending out to different positions along the radius of the circle with respect to one another; and
an orbiting scroll having an orbiting wrap which forms an outside orbiting scroll surface curve and an inside orbiting scroll surface curve, at least one curve formed as two curves extending to different positions along the radius of the circle are combined to each other, the orbiting wrap engaged with the fixed wrap to form compression chambers, and the orbiting scroll performing an orbital motion with respect to the fixed scroll,
wherein the fixed wrap and the orbiting wrap comprise:
an outside surface first curve at a suction side of an outside surface curve, and
an outside surface second curve at a discharge port side of the outside surface curve,
wherein the outside surface first curve is formed from a wrap terminal angle (Φe) to one point A, wherein the outside surface second curve is formed from the one point A to 0°, and wherein the one point A is in a crank angle of Φe−(540±180)°, and
wherein the fixed wrap and the orbiting wrap further comprise:
an inside surface first curve at a suction side of an inside surface curve, and
an inside surface second curve at a discharge port side of an inside surface curve, and
wherein the inner surface first curve is formed from a wrap terminal angle (Φe) to another point B, wherein the inner side surface second curve is formed from the another point B to 0°, and wherein the another point B is in a crank angle of (Φe−(360±180°),
wherein the fixed wrap and the orbiting wrap have a first constant section, a variable section, and a second constant section consecutively formed in a direction from a wrap final end to a wrap initial end, a wrap thickness of the first constant section is smaller than that of the second constant section, and a wrap thickness of the variable section is continuously increased along an entire length of the variable section between the first constant section and the second constant section, and
wherein an outside surface curve of the variable section is formed as the same involute curve which forms an outside surface of the first constant section, and an inside surface curve of the variable section is formed as the same involute curve as the involute curve which forms an inside surface of the second constant section.

9. The scroll compressor of claim 8 , wherein
a radius position of the outside surface first curve is smaller than that of the outside surface second curve,
a radius position of the outside surface first curve is equal to that of the inside surface first curve, and
a radius position of the outside surface second curve is equal to that of the inside surface second curve.

10. The scroll compressor of claim 8 , wherein the outside surface first curve is longer than the inside surface first curve.

11. The scroll compressor of claim 8 , wherein the outside surface second curve is longer than the inside surface second curve.

12. The scroll compressor of claim 8 , wherein the starting point of the outside surface first curve has a crank angle difference of 180° from the starting point of the inside surface first curve.

13. The scroll compressor of claim 8 , wherein the starting point of the outside surface second curve has a crank angle difference of 180° from the starting point of the inside surface second curve.

14. The scroll compressor of claim 8 , wherein

Assignees

• Kiem Myungkyun
• Kim Kyunghwan
• Park Ikseo
• Lg Electronics Inc

Inventors

• Kiem Myungkyun
• Kim Kyunghwan
• Park Ikseo

Classifications

• F04C18/0284

  Details of the wrap tips · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C2250/20

  of the rotor · CPC title

• F04C2250/301

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

• F04C29/00

  Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00 · CPC title