Scroll compressor with an arcuate and a logarithmic spiral sections

Patent metadata

Field	Value
Publication number	US-9605675-B2
Application number	US-201414299077-A
Country	US
Kind code	B2
Filing date	Jun 9, 2014
Priority date	Jun 10, 2013
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

A scroll compressor is provided which is configured such that an arcuate section may be formed from a suction end of a wrap to a first point to increase a suction volume, and a logarithmic spiral section in which a wrap thickness increases may be formed from a second point to a discharge end of the wrap. This may increase a volume ratio of the compressor so as to increase a capacity of the compressor and prevent damage to the wrap due to a high compression ratio operation, thereby enhancing reliability of the compressor.

First claim

What is 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, the orbiting scroll orbiting with respect to the fixed scroll to form compression chambers therebetween, wherein each of the fixed wrap and the orbiting wrap is formed with an arcuate section from a suction end to a first point along a rotational angle in a direction toward a discharge end, and a logarithmic spiral section from a second point to the discharge end along the rotational angle, wherein the second point is closer to the discharge end than the first point, and wherein a maximum wrap thickness of the logarithmic spiral section is 1.5 to 1.8 times a maximum wrap thickness of the arcuate section.

2. The scroll compressor of claim 1 , wherein the arcuate section of each wrap has a same radius from the discharge end along a length of the arcuate section.

3. The scroll compressor of claim 2 , wherein the arcuate section is formed in a section from the suction end up to a range of 180° to 360° in a direction toward the discharge end.

4. The scroll compressor of claim 1 , wherein the logarithmic spiral section of each wrap is formed such that a wrap thickness thereof increases toward the discharge end.

5. The scroll compressor of claim 1 , wherein a bypass hole is formed near the discharge end of the fixed wrap, and wherein a diameter of the bypass hole is smaller than the wrap thickness of the logarithmic spiral section.

6. The scroll compressor of claim 5 , wherein the diameter of the bypass hole is 0.6 to 0.8 times the wrap thickness of the logarithmic spiral section.

7. The scroll compressor of claim 1 , wherein a multi-curve section is formed between the arcuate section and the logarithmic spiral section comprising a plurality of consecutively connected curves.

8. A scroll compressor, comprising:
a fixed scroll having a fixed wrap; and
an orbiting scroll having an orbiting wrap engaged with the fixed wrap, the orbiting scroll orbiting with respect to the fixed scroll to form compression chambers therebetween, wherein an outer surface and an inner surface of each of the fixed wrap and the orbiting wrap are formed with an arcurate section having a same radius, with respect to a discharge end of the respective wrap, from a suction end to a first point along a rotational angle, and with a logarithmic section having a wrap thickness of each of the fixed wrap and the orbiting wrap gradually increasing from a second point to the discharge end along the rotational angle, wherein the second point is closer to the discharge end than the first point, and wherein a maximum wrap thickness of the logarithmic spiral section is 1.5 to 1.8 times a maximum wrap thickness of the arcuate section.

9. The scroll compressor of claim 8 , wherein a multi-curve section is formed between the first point and the second point comprising a plurality of consecutively connected curves.

10. The scroll compressor of claim 8 , wherein the arcuate section is formed from the suction end of each wrap up to a range of 180° to 300° based on the rotational angle.

11. The scroll compressor of claim 8 , wherein a discharge opening to discharge compressed refrigerant therethrough is formed in the fixed scroll or the orbiting scroll, and a bypass hole to bypass a portion of refrigerant, which is being compressed, before the refrigerant reaches the discharge opening is formed in the fixed scroll or the orbiting scroll, and wherein a diameter of the bypass hole is 0.6 to 0.8 times of a wrap thickness of the logarithmic spiral section.

Assignees

• Lg Electronics Inc

Inventors

• Park Inwon
• Choi Seheon
• Lee Byeongchul
• Yoo Byungkil

Classifications

• F04C2250/20

  of the rotor · CPC title

• F04C2250/301

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

• F04C18/04 Primary

  of internal-axis type · CPC title

• F01C1/0246 Primary

  Details concerning the involute wraps or their base, e.g. geometry · CPC title

• F04C18/0215

  where only one member is moving · CPC title