Scroll compressor with bypass portions

Patent metadata

Field	Value
Publication number	US-10125767-B2
Application number	US-201715624841-A
Country	US
Kind code	B2
Filing date	Jun 16, 2017
Priority date	May 21, 2013
Publication date	Nov 13, 2018
Grant date	Nov 13, 2018

Abstract

There is disclosed a scroll compressor according to the present disclosure in which a discharge port is formed at a central portion thereof, and a pair of two compression chambers continuously moving toward the discharge port are formed, and a plurality of bypass portions are formed at each interval along a movement path of each compression chamber in the both compression chambers, and compression gradients of the both compression chambers are formed to be different from each other, wherein when an interval between a bypass portion closest to the discharge port and another bypass portion adjacent to the bypass portion among the bypass portions of each compression chamber is defined as a first interval, respectively, a first interval of a second bypass portion belonging to a compression chamber having a relatively larger compression gradient is formed to be smaller than that of a first bypass portion belonging to the other compression chamber between the both compressor chambers.

First claim

What is claimed is:

1. A scroll compressor in which a discharge port is provided, and a pair of two compression chambers continuously moving toward the discharge port are formed, and a plurality of bypass portions are formed at each interval along a movement path of each compression chamber in the both compression chambers, and compression gradients of the both compression chambers are formed to be different from each other, wherein when a compression chamber having a relatively smaller compression gradient and a compression chamber having a relatively larger compression gradient between the both compression chambers are defined as a first compression chamber and a second compression chamber, respectively, and bypass portions belonging to the first compression chamber and bypass portions belonging to the second compression chamber are defined as first bypass portions and second bypass portions, respectively, the bypass portions closest to the discharge port, among the second bypass portions, have a narrowest interval.

2. The scroll compressor of claim 1 , wherein an overall cross-sectional area of the first bypass portion and an overall cross-sectional area of the second bypass portion are formed to be the same as each other.

3. The scroll compressor of claim 1 , wherein the first bypass portion and the second bypass portion are configured with a plurality of bypass holes, respectively, and the each bypass portion is configured with the same number of bypass holes.

4. The scroll compressor of claim 1 , wherein a number of the first bypass portions and a number of the second bypass portions are configured with a plurality of bypass holes, respectively, and the cross-sectional areas of the respective bypass holes are all formed to be the same.

5. The scroll compressor of claim 1 , wherein an overall cross-sectional area of the second bypass portion is formed to be larger than that of the first bypass portion.

6. The scroll compressor of claim 1 , wherein the first bypass portion and the second bypass portion comprise a plurality of bypass holes, respectively, and the second bypass portion is formed with a larger number of bypass holes than the first bypass portion.

7. The scroll compressor of claim 1 , wherein a plurality of discharge ports are provided and formed to communicate independently with the each compression chamber.

8. A scroll compressor, comprising:
a first scroll in which a first wrap is formed on one lateral surface of a first plate portion, and a discharge port penetrated in a thickness direction of the first plate portion is eccentrically formed with respect to a center of the first plate portion in the vicinity of an inner end portion of the first wrap, and a plurality of first bypass holes are formed at a predetermined intervals at a plurality of positions, respectively, along an inner surface of the first wrap, and a plurality of second bypass holes are formed at a predetermined intervals at a plurality of positions, respectively, along an outer surface of the first wrap, in a penetrating manner in the thickness direction of the first plate portion between the inner surface and the outer surface of the first wrap;
a second scroll in which a second wrap engaged with the first wrap is formed on one lateral surface of a second plate portion, and the inner surface of the first wrap forms a first compression chamber between the inner surface of the first wrap and an outer surface of the second wrap, and the outer surface of the first wrap forms a second compression chamber between the outer surface of the first wrap and an inner surface of the second wrap while performing an orbiting movement with respect to the first scroll; and
a rotating shaft having an eccentric portion to be coupled through a central portion of the second scroll to overlap with the second wrap in a radial direction, wherein when bypass holes belonging to the first compression chamber and bypass holes belonging to the second compression chamber are defined as first bypass portions and second bypass portions, respectively, an interval between a bypass portion closest to the discharge port and a next bypass portion adjacent to the bypass portion among the first bypass portions and an interval between a bypass portion closest to the discharge port and a next bypass portion adjacent to the bypass portion among the second bypass portions are defined as a first inner interval, and a first outer interval, respectively, the first outer interval is formed to be smaller than the first inner interval.

9. The scroll compressor of claim 8 , wherein the bypass holes are formed by successively forming at least two or more bypass holes to constitute a plurality of bypass portions, and wherein a number of bypass holes belonging to the one bypass portion is formed to be the same for each group.

10. The scroll compressor of claim 8 , wherein the bypass holes are formed by successively forming at least two or more bypass holes to constitute a plurality of bypass portions, and wherein each cross-sectional area of bypass holes belonging to the one bypass portion is formed to be the same.

11. The scroll compressor of claim 8 , wherein a number of bypass holes belonging to the second compression chamber is formed to be larger than that belonging to the first compression chamber.

12. The scroll compressor of claim 8 , wherein a cross-sectional area of the entire bypass holes belonging to the second compression chamber is formed to be larger than that of the entire bypass holes belonging to the first compression chamber.

13. The scroll compressor of claim 8 , wherein the discharge port comprises:
a first discharge port communicating with the first compression chamber; and
a second discharge port communicating with the second compression chamber.

14. A scroll compressor, comprising:
a casing in which oil is stored in an inner space thereof;
a drive motor provided in an inner space of the casing;
a rotating shaft coupled to the drive motor;
a frame provided below the drive motor;
a first scroll provided below the frame in which a first wrap is formed one lateral surface a first plate portion, and a discharge port is formed adjacent to a central side end portion of the first wrap, and at least one first bypass hole and at least one second bypass hole are formed around an inner surface of the first wrap and around an outer surface of the first wrap, respectively, and first bypass holes and second bypass holes are formed at intervals along the formation direction of the first wrap; and
a second scroll provided between the frame and the first scroll in which a second wrap engaged with the first wrap is formed on one lateral surface of the second plate portion, and the rotating shaft is eccentrically coupled to the second wrap to overlap with the second wrap in a radial direction, and a pair of two compression chambers are formed between the second scroll and the first scroll while performing an orbiting movement with respect to the first scroll, wherein an overall cross-sectional area of the second bypass holes is formed to be larger than an overall cross-sectional area of the first bypass holes within a range of a rotation angle of 180 degrees along the first wrap from an inner end of the first wrap.

15. The scroll compressor of claim 14 , wherein an overall cross-sectional area of the first bypass holes is formed to be the same as that of the second bypass holes.

16. The scroll compressor of claim 14 , wherein an overall cross-sectional area of the second bypass holes is formed to be larger than an overall cross-sectional area of the first bypass ho

Assignees

• Lg Electronics Inc

Inventors

• Choi Yongkyu
• Won Inho
• Kim Cheolhwan

Classifications

• F04C18/0261 Primary

  Details of the ports, e.g. location, number, geometry · CPC title

• F04C18/0215

  where only one member is moving · CPC title

• F04C18/0246

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

• F04C23/008

  Hermetic pumps · CPC title

• F04C2240/40

  Electric motor · CPC title