IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0387908
(2006-03-24)
|
등록번호 |
US-7438539
(2008-10-21)
|
우선권정보 |
JP-2005-085416(2005-03-24) |
발명자
/ 주소 |
- Kohsokabe,Hirokatsu
- Higa,Kazuto
- Tojo,Kenji
- Kuboi,Daisuke
|
출원인 / 주소 |
- Hitachi Air Conditioning Systems Co., Ltd
- The Tokyo Electric Power Company, Incorporated
|
대리인 / 주소 |
Antonelli, Terry, Stout & Kraus, LLP.
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
11 |
초록
▼
A hermetic type scroll compressor according to the invention includes a scroll compressor element in which an end plate of a orbiting scroll and an end plate of a fixed scroll are assembled such that they slide against each other, an electric motor element which drives the scroll compressor element,
A hermetic type scroll compressor according to the invention includes a scroll compressor element in which an end plate of a orbiting scroll and an end plate of a fixed scroll are assembled such that they slide against each other, an electric motor element which drives the scroll compressor element, a hermetic casing housing the scroll compressor element and the electric motor element and holding lubricating oil collected at a bottom thereof, and an oil separator disposed on a discharge side of the scroll compressor element. An interior of the hermetic casing is kept at an intermediate pressure between a suction pressure and a discharge pressure. An oil return mechanism is provided, which intermittently returns lubricating oil from the oil separator to sliding parts of the orbiting scroll end plate and the fixed scroll end plate. The hermetic type scroll compressor 31 can be improved in performance and reliability while promoting cost reduction.
대표청구항
▼
What is claimed is: 1. A hermetic type scroll compressor comprising: a scroll compressor element in which an end plate of a orbiting scroll and an end plate of a fixed scroll are assembled such that a sliding surface of the end plate of the orbiting scroll and a sliding surface of the end plate of
What is claimed is: 1. A hermetic type scroll compressor comprising: a scroll compressor element in which an end plate of a orbiting scroll and an end plate of a fixed scroll are assembled such that a sliding surface of the end plate of the orbiting scroll and a sliding surface of the end plate of the fixed scroll slide against each other, an electric motor element which drives the scroll compressor element, a hermetic casing, an interior space of which houses the scroll compressor element and the electric motor element and holds lubricating oil collected at a bottom thereof, wherein the interior space of the hermetic casing is kept at an intermediate pressure between a suction pressure and a discharge pressure an oil separator disposed on a discharge side of the scroll compressor element, and an oil return mechanism, which intermittently returns lubricating oil from the oil separator into the hermetic casing, comprising an oil return passage that communicates with the oil separator and has an opening in the sliding surface of the end plate of the fixed scroll, and an oil pocket that is formed on a sliding surface of the end plate of the orbiting scroll and communicates alternately with the opening of the oil return passage and the interior space of the hermetic casing as the orbiting scroll revolves. 2. The hermetic type scroll compressor according to claim 1; wherein an annular groove constantly communicating with the interior space of the hermetic casing is formed on the sliding surface of the end plate of the fixed scroll, and wherein the oil pocket communicates alternately with the oil return passage and the annular groove. 3. The hermetic type scroll compressor according to claim 1, wherein the oil return passage includes a vertical hole having an opening in the sliding surface of the end plate of the fixed scroll and a horizontal hole having an opening in a side of the end plate of the fixed scroll, and the oil return mechanism further comprises an oil return pipe which extends from the oil separator disposed outside the hermetic casing and penetrates through the hermetic casing and communicates with the horizontal hole formed in the oil return passage. 4. The hermetic type scroll compressor according to claim 1, wherein carbon dioxide is used as working fluid. 5. A hermetic type scroll compressor comprising: a scroll compressor element in which an end plate of a orbiting scroll and an end plate of a fixed scroll are assembled such that a sliding surface of the end plate of the orbiting scroll and a sliding surface of the end plate of the fixed scroll slide against each other, an electric motor element which drives the scroll compressor element, a hermetic casing, an interior space of which houses the scroll compressor element and the electric motor element and which holds lubricating oil collected at a bottom thereof, an oil separator disposed on a discharge side of the scroll compressor, an oil return mechanism is provided, which intermittently returns lubricating oil from the oil separator into the hermetic casing, comprising an oil return passage that communicates with the oil separator and has an opening in the sliding surface of the end plate of the fixed scroll, and an oil pocket that is formed on a sliding surface of the end plate of the orbiting scroll and communicates alternately with the opening of the oil return passage and the interior space of the hermetic casing, as the orbiting, scroll revolves, and wherein the oil pocket provides lubricating oil from around a circumference of the end plate of the orbiting scroll to the sliding parts of the end plate of the orbiting scroll and the end plate of the fixed scroll; wherein the interior space of the hermetic casing is kept at an intermediate pressure between a suction pressure and a discharge pressure, and wherein carbon dioxide is used as working fluid. 6. The hermetic type scroll compressor according to claim 5, wherein the oil pocket comprises of a plurality of oiling grooves which are formed on the sliding part of the end plate of the orbiting scroll and which intermittently communicate with the interior space of the hermetic casing around the circumference of the end plate of the orbiting scroll and the opening in the fixed scroll. 7. The hermetic type scroll compressor according to claim 6, wherein the oiling grooves are formed along the entire circumference of the sliding part of the end plate of the orbiting scroll, and wherein the opening of the oil return passage is formed on a sliding part of the end plate of the fixed scroll comprises of an annular groove such that the annular groove intermittently communicates with the oiling grooves as the orbiting scroll revolves. 8. A refrigerating and air-conditioning apparatus having a refrigeration cycle system in which a hermetic type scroll compressor, a gas cooler, an expansion valve and an evaporator are connected with refrigerant piping: wherein carbon dioxide is used as a refrigerant for the refrigeration cycle system; wherein an interior space of a hermetic casing of the hermetic type scroll compressor is kept at an intermediate pressure between a suction pressure and a discharge pressure; and wherein the hermetic type scroll compressor includes; a scroll compressor element in which an end plate of a orbiting scroll and an end plate of a fixed scroll are assembled such that they slide against each other, an electric motor element which drives the scroll compressor element, the interior space of the hermetic casing housing the scroll compressor element and the electric motor element and holding lubricating oil collected at a bottom thereof, an oil separator disposed on a discharge side of the scroll compressor element, and an oil return mechanism, which intermittently returns lubricating oil from the oil separator into the hermetic casing, comprising an oil return passage that communicates with the oil separator and has an opening in the sliding surface of the end plate of the fixed scroll, and an oil pocket that is formed on a sliding surface of the end plate of the orbiting scroll and communicates alternately with the opening of the oil return passage and the interior space of the hermetic casing as the orbiting scroll revolves. 9. The refrigerating and air-conditioning apparatus according to claim 8, wherein the oil return mechanism intermittently introduces lubricating oil from around a circumference of the end plate of the orbiting scroll to the sliding parts of the end plate of the orbiting scroll and the end plate of the fixed scroll.
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