Scroll compressor having an area of bypass holes formed at a compression chamber with a larger volume reduction gradient larger than an area of bypass holes at the other compression chamber

Patent metadata

Field	Value
Publication number	US-9683568-B2
Application number	US-201414782080-A
Country	US
Kind code	B2
Filing date	May 19, 2014
Priority date	May 21, 2013
Publication date	Jun 20, 2017
Grant date	Jun 20, 2017

Abstract

A scroll compressor is provided. The scroll compressor may include a fixed scroll including a fixed wrap, and an orbiting scroll including an orbiting wrap coupled to the fixed wrap to form a pair of compression chambers. An entire cross-sectional area of bypass holes formed at a compression chamber with a larger volume reduction gradient between the compression chambers may be formed to be larger than an entire cross-sectional area of bypass holes formed at the other compression chamber to prevent over-compression at the compression chamber with the larger volume reduction gradient, thereby enhancing an entire efficiency of the compressor.

First claim

The invention claimed is:

1. A scroll compressor having compression chambers with different volume reduction gradients, wherein an entire cross-sectional area of bypass holes formed at a compression chamber with a larger volume reduction gradient between the compression chambers is formed to be larger than an entire cross-sectional area of bypass holes formed at the other compression chamber.

2. The scroll compressor of claim 1 , wherein a number of the bypass holes formed at the compression chamber with the larger volume reduction gradient between the compression chambers is formed to be greater than a number of the bypass holes formed at the other compression chamber.

3. The scroll compressor of claim 1 , wherein an individual cross-sectional area of the bypass holes formed at the compression chamber with the larger volume reduction gradient between the compression chambers is formed to be larger than an individual cross-sectional area of the bypass holes formed at the other compression chamber.

4. A scroll compressor, comprising:
a fixed scroll having a fixed wrap;
an orbiting scroll coupled to the fixed scroll, and having an orbiting wrap forming a first compression chamber and a second compression chamber on an outer and an inner surface of the orbiting wrap and a rotational shaft coupling portion formed at a central portion of the orbiting wrap to perform orbiting movement with respect to the fixed scroll, wherein a volume reduction gradient of the first compression chamber is larger than a volume reduction gradient of the second compression chamber;
a rotational shaft having an eccentric portion which is coupled to the rotational shaft coupling portion of the orbiting scroll to be overlapped with the orbiting wrap in a radial direction; and
a drive configured to drive the rotational shaft, wherein bypass holes passing from the first compression chamber and the second compression chamber to an outside are formed at the fixed scroll, and wherein an entire cross-sectional area of the bypass holes passing from the first compression chamber to the outside is formed to be larger than an entire cross-sectional area of the bypass holes passing from the second compression chamber to the outside.

5. The scroll compressor of claim 4 , wherein a number of the bypass holes passing from the first compression chamber to the outside is formed to be greater than a number of the bypass holes passing from the second compression chamber to the outside.

6. The scroll compressor of claim 4 , wherein an individual cross-sectional area of the bypass holes passing from the first compression chamber to the outside is formed to be larger than an individual cross-sectional area of the bypass holes passing from the second compression chamber to the outside.

7. The scroll compressor of claim 4 , wherein a protrusion is formed on an inner circumferential surface at an inner end portion of the axed wrap, and wherein a recess which is brought into contact with the protrusion to form a compression chamber is formed on an outer circumferential surface of the rotational shaft coupling portion.

8. The scroll compressor of claim 4 , wherein the fixed scroll includes an end plate, and wherein the fixed wrap is formed on a bottom surface of the end plate of the fixed scroll.

9. The scroll compressor of claim 8 , wherein the bypass holes passing through the first compression chamber and the second compression chamber to the outside are formed at the end plate of the fixed scroll.

10. The scroll compressor of claim 8 , wherein the orbiting scroll includes an end plate, wherein the orbiting wrap is formed on an upper surface of the end plate of the orbiting scroll, and wherein the fixed wrap is coupled to the orbiting wrap.

11. The scroll compressor of claim 4 , further including:
a sealed container including a cylindrical shaped casing, an upper shell coupled to an upper portion of the casing, and a lower shell coupled to a lower portion of the casing;
a suction pipe penetratingly installed on a lateral surface of the casing; and
a discharge pipe penetratingly installed at an upper portion of the upper shell.

12. The scroll compressor of claim 11 , further including a main frame installed in the casing at an upper side of the drive, wherein the fixed scroll is installed at an upper side of the main frame.

13. The scroll compressor of claim 12 , wherein the orbiting scroll is installed between the fixed scroll and the main frame, and wherein the orbiting scroll is supported by an upper surface of the main frame.

14. The scroll compressor of claim 11 , wherein the drive includes a drive motor installed in the sealed container, wherein the drive motor includes:
a stator fixed on an inner surface of the casing; and
a rotor rotated by an interaction with the stator positioned within the stator, and wherein the rotational shaft is coupled to the rotor to drive the rotational shaft.

15. A scroll compressor formed with a pair of compression chambers, wherein a refrigerant being discharged from the pair of compression chambers is discharged through one discharge port, wherein volume reduction gradients of the pair of compression chambers are different from each other, wherein bypass holes bypassing a portion of the refrigerant prior to discharging the refrigerant compressed in each of the pair of compression chambers through the discharge port are formed at each of the pair of compression chambers, wherein an entire cross-sectional areas of the bypass holes formed at the pair of compression chambers, respectively, are different from each other, and wherein the entire cross-sectional area of the bypass holes formed at a compression chamber of the pair of the compression chambers with a larger volume reduction gradient between the pair of compression chambers is formed to be larger than an entire cross-sectional area of the bypass holes formed at the other compression chamber of the pair of compression chambers.

16. The scroll compressor of claim 15 , wherein a number of the bypass holes formed at the compression chamber of the pair of compression chambers with the larger volume reduction gradient between the pair of compression chambers is formed to be greater than a number of the bypass holes formed at the other compression chamber of the pair of compression chambers.

17. The scroll compressor of claim 15 , wherein an individual cross-sectional area of the bypass holes formed at the compression chamber of the pair of compression chambers with the larger volume reduction gradient between the both the pair of compression chambers is formed to be larger than an individual cross-sectional area of the bypass holes formed at the other compression chamber of the pair of compression chambers.

Assignees

• Lg Electronics Inc

Inventors

• Choi Yongkyu
• Won Inho
• Kim Cheolhwan

Classifications

• F01C1/0215

  where only one member is moving · CPC title

• F04C15/06

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title

• F04C18/0215

  where only one member is moving · CPC title

• F04C28/26

  using bypass channels · CPC title

• F04C2270/80

  Diagnostics · CPC title