Scroll compressor
A scroll compressor includes fixed and movable scrolls including fixed and movable side end plates and fixed and movable side wraps. The fixed-side end plate includes a first fixed-side passage that communicates with a high-pressure space, and a second fixed-side passage to supply lubricating oil from the high-pressure space to a compression chamber formed between the scrolls. The movable-side end plate includes a movable-side groove that intermittently allows communication between the first fixed-side passage and the second fixed-side passage. The compression chamber includes a first compression chamber, and a second compression chamber located inside the first compression chamber. The second fixed-side passage includes a first fixed-side hole that intermittently communicates with the movable-side groove, and a second fixed-side hole that communicates with the first fixed-side hole and intermittently communicates with the second compression chamber.
1. A scroll compressor comprising:
a fixed scroll including a fixed-side end plate and a fixed-side wrap; and
a movable scroll including a movable-side end plate and a movable-side wrap,
the fixed-side end plate including
a first fixed-side passage that communicates with a high-pressure space, and
a second fixed-side passage configured to supply lubricating oil from the high-pressure space to a compression chamber formed between the fixed scroll and the movable scroll,
the movable-side end plate including a movable-side groove that intermittently allows communication between the first fixed-side passage and the second fixed-side passage while the movable scroll revolves relative to the fixed scroll,
the compression chamber including
a first compression chamber located on an outermost side, and
a second compression chamber located inside the first compression chamber and located between an outermost side surface of the fixed-side wrap and an inner side surface of the movable-side wrap, and
the second fixed-side passage including
a first fixed-side hole that intermittently communicates with the movable-side groove while the movable scroll revolves relative to the fixed scroll, and
a second fixed-side hole that communicates with the first fixed-side hole and intermittently communicates with the second compression chamber while the movable scroll revolves relative to the fixed scroll.
2. The scroll compressor according to claim 1 , wherein
the second fixed-side hole has a fixed-side opening that is open to a surface of the fixed-side end plate, the surface sliding on the movable-side wrap.
3. The scroll compressor according to claim 2 , wherein
the fixed-side opening has a diameter smaller than a thickness of the movable-side wrap.
4. The scroll compressor according to claim 2 , wherein
the fixed-side end plate further includes a fixed-side groove that communicates with the second fixed-side passage, and
the fixed-side groove intermittently communicates with the movable-side groove while the movable scroll revolves relative to the fixed scroll.
5. The scroll compressor according to claim 2 , wherein
the second fixed-side hole further intermittently communicates with the first compression chamber while the movable scroll revolves relative to the fixed scroll.
6. The scroll compressor according to claim 2 , wherein
the first fixed-side passage, the movable-side groove, and the second fixed-side passage are configured to supply lubricating oil from the high-pressure space to the compression chamber by differential pressure while the movable scroll revolves relative to the fixed scroll.
7. The scroll compressor according to claim 2 , wherein
the first fixed-side passage, the second fixed-side passage, and the movable-side groove are provided at positions such that transition is sequentially and repeatedly made from a first state to a fourth state while the movable scroll revolves relative to the fixed scroll,
in the first state,
the movable-side groove communicates with the first fixed-side passage and the second fixed-side passage, and
the second fixed-side passage does not communicate with the second compression chamber,
in the second state
the movable-side groove communicates with the first fixed-side passage and the second fixed-side passage, and
the second fixed-side passage communicates with the second compression chamber,
in the third state
the movable-side groove communicates with the first fixed-side passage,
the movable-side groove does not communicate with the second fixed-side passage, and
the second fixed-side passage communicates with the second compression chamber, and
in the fourth state
the movable-side groove communicates with the first fixed-side passage,
the movable-side groove does not communicate with the second fixed-side passage, and
the second fixed-side passage does not communicate with the second compression chamber.
8. The scroll compressor according to claim 1 , wherein
the fixed-side end plate further includes a fixed-side groove that communicates with the second fixed-side passage, and
the fixed-side groove intermittently communicates with the movable-side groove while the movable scroll revolves relative to the fixed scroll.
9. The scroll compressor according to claim 8 , wherein
the second fixed-side hole further intermittently communicates with the first compression chamber while the movable scroll revolves relative to the fixed scroll.
10. The scroll compressor according to claim 8 , wherein
the first fixed-side passage, the movable-side groove, and the second fixed-side passage are configured to supply lubricating oil from the high-pressure space to the compression chamber by differential pressure while the movable scroll revolves relative to the fixed scroll.
11. The scroll compressor according to claim 8 , wherein
the first fixed-side passage, the second fixed-side passage, and the movable-side groove are provided at positions such that transition is sequentially and repeatedly made from a first state to a fourth state while the movable scroll revolves relative to the fixed scroll,
in the first state,
the movable-side groove communicates with the first fixed-side passage and the second fixed-side passage, and
the second fixed-side passage does not communicate with the second compression chamber,
in the second state
the movable-side groove communicates with the first fixed-side passage and the second fixed-side passage, and
the second fixed-side passage communicates with the second compression chamber,
in the third state
the movable-side groove communicates with the first fixed-side passage,
the movable-side groove does not communicate with the second fixed-side passage, and
the second fixed-side passage communicates with the second compression chamber, and
in the fourth state
the movable-side groove communicates with the first fixed-side passage,
the movable-side groove does not communicate with the second fixed-side passage, and
the second fixed-side passage does not communicate with the second compression chamber.
12. The scroll compressor according to claim 1 , wherein
the second fixed-side hole further intermittently communicates with the first compression chamber while the movable scroll revolves relative to the fixed scroll.
13. The scroll compressor according to claim 12 , wherein
the first fixed-side passage, the movable-side groove, and the second fixed-side passage are configured to supply lubricating oil from the high-pressure space to the compression chamber by differential pressure while the movable scroll revolves relative to the fixed scroll.
14. The scroll compressor according to claim 12 , wherein
the first fixed-side passage, the second fixed-side passage, and the movable-side groove are provided at positions such that transition is sequentially and repeatedly made from a first state to a fourth state while the movable scroll revolves relative to the fixed scroll,
in the first state,
the movable-side groove communicates with the first fixed-side passage and the second fixed-side passage, and
the second fixed-side passage does not communicate with the second compression chamber,
in the second state
the movable-side groove communicates with the first fixed-side passage and the second fixed-side passage, and
the second fixed-side passage communicates with the second compression chamber,
in the third state
the movable-side groove communicates with the first fixed-side passage,
the movable-side groove does not communicate with the second fixed-side passage, and
the second fixed-side passage communicates with the second compression chamber, and
in the fourth state
the movable-side groove communicates with the first fixed-side passage,
the movable-side groove does not communicate with the second fixed-side passage, and
the second fixed-side passage does not communicate with the second compression chamber.
15. The scroll compressor according to claim 1 , wherein
the first fixed-side passage, the movable-side groove, and the second fixed-side passage are configured to supply lubricating oil from the high-pressure space to the compression chamber by differential pressure while the movable scroll revolves relative to the fixed scroll.
16. The scroll compressor according to claim 15 , wherein
the first fixed-side passage, the second fixed-side passage, and the movable-side groove are provided at positions such that transition is sequentially and repeatedly made from a first state to a fourth state while the movable scroll revolves relative to the fixed scroll,
in the first state,
the movable-side groove communicates with the first fixed-side passage and the second fixed-side passage, and
the second fixed-side passage does not communicate with the second compression chamber,
in the second state
the movable-side groove communicates with the first fixed-side passage and the second fixed-side passage, and
the second fixed-side passage communicates with the second compression chamber,
in the third state
the movable-side groove communicates with the first fixed-side passage,
the movable-side groove does not communicate with the second fixed-side passage, and
the second fixed-side passage communicates with the second compression chamber, and
in the fourth state
the movable-side groove communicates with the first fixed-side passage,
the movable-side groove does not communicate with the second fixed-side passage, and
the second fixed-side passage does not communicate with the second compression chamber.
17. The scroll compressor according to claim 1 , wherein
the first fixed-side passage, the second fixed-side passage, and the movable-side groove are provided at positions such that transition is sequentially and repeatedly made from a first state to a fourth state while the movable scroll revolves relative to the fixed scroll,
in the first state,
the movable-side groove communicates with the first fixed-side passage and the second fixed-side passage, and
the second fixed-side passage does not communicate with the second compression chamber,
in the second state
the movable-side groove communicates with the first fixed-side passage and the second fixed-side passage, and
the second fixed-side passage communicates with the second compression chamber,
in the third state
the movable-side groove communicates with the first fixed-side passage,
the movable-side groove does not communicate with the second fixed-side passage, and
the second fixed-side passage communicates with the second compression chamber, and
in the fourth state
the movable-side groove communicates with the first fixed-side passage,
the movable-side groove does not communicate with the second fixed-side passage, and
the second fixed-side passage does not communicate with the second compression chamber.