Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Reexamination Certificate
1999-11-12
2001-03-06
Denion, Thomas (Department: 3748)
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
C418S083000, C417S410500, C184S006160
Reexamination Certificate
active
06196817
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATION
This application is based upon and claims priority from Japanese Patent Application No. H. 10-356482 filed Dec. 15, 1998, the contents of which are incorporated herein by reference.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a compressor which is preferably applicable to an electric compressor for a refrigeration cycle.
2. Description of Prior Art
According to an invention disclosed in JP-A-7-71388, for example, lubricating oil flowed into a motor housing with refrigerant from a compressing mechanism is led to the compressing mechanism (sliding portion of a compressor) via a lubricating oil passage formed on a middle housing.
Generally, the lubricating oil passage is formed by drilling a hole in a housing. Thus, if the passage length is long compared to the passage bore, a drill may be easily broken, and machining may be difficult. On the other hand, if the passage bore is too large, highly pressurized refrigerant returns to low pressure side (suction side of the compressing mechanism) together with the lubricating oil, thereby reducing the efficiency of the compressor.
Then, according to the above prior art, after forming a lubricating oil passage having a comparatively large bore, a pin-shaped contraction means is inserted and installed in the lubricating oil passage to reduce cross sectional area of the lubricating oil passage, and the highly pressurized refrigerant is prevented from returning to the low pressure side (suction side of the compressing mechanism) with the lubricating oil.
According to the above prior art, however, it is necessary to install the contraction means (contraction pin) in the lubricating oil passage. Accordingly, the prior art has a disadvantage as to reducing the manufacturing cost because it requires the contraction means and certain manufacturing processes for the contraction means.
Furthermore, it is necessary to machine a counter boring at a place of the lubricating oil passage in which the contraction pin is inserted. Accordingly, the passage structure is complicated, and it may be difficult to reduce the machining processes (time) for the counter boring.
SUMMARY OF THE INVENTION
The present invention is made in light of the foregoing problems, and it is an object of the present invention to provide a compressor which can control lubricating oil supply quantity with a simple structure.
According to a compressor of the present invention, it has a first housing having a first lubricating oil passage and a second lubricating oil passage, and has a second housing attached to the first housing for forming a contacting surface between the first housing and the second housing. The second housing includes a recess formed on the contacting surface for communicating the first lubricating oil passage with the second lubricating oil passage.
Accordingly, the lubricating oil amount between the first lubricating oil passage and the second lubricating oil passage is easily controlled by adjusting the size of the recess.
Furthermore, since there is no necessity to enlarge the bore of the first and second lubricating oil passages and to install the contraction means (contraction pin) in the lubricating oil passage, the lubricating oil passage structure is simplified, and number of parts and manufacturing processes are reduced.
REFERENCES:
patent: 4470778 (1984-09-01), Mabe
patent: 4538975 (1985-09-01), Tsukagoshi
patent: 4568253 (1986-02-01), Wood
patent: 4624629 (1986-11-01), Murayama et al.
patent: 4626181 (1986-12-01), Dantigraber
patent: 4737088 (1988-04-01), Taniguchi et al.
patent: 4818198 (1989-04-01), Tamura et al.
patent: 4875835 (1989-10-01), Nakajima et al.
patent: 5421709 (1995-06-01), Hill et al.
patent: 5591018 (1997-01-01), Takeuchi et al.
patent: 5616018 (1997-04-01), Ma
patent: 5645408 (1997-07-01), Fujio et al.
patent: 5720602 (1998-02-01), Hill et al.
patent: 5772407 (1998-06-01), Kato et al.
patent: 59-029791 (1984-02-01), None
patent: 62-075091 (1987-04-01), None
patent: 64-032091 (1989-02-01), None
patent: 01-301972 (1989-12-01), None
patent: 02-030994 (1990-02-01), None
patent: 03-11181 (1991-01-01), None
patent: 04-121481 (1992-04-01), None
patent: 05-126066 (1993-05-01), None
patent: 06-033890 (1994-02-01), None
patent: 06-249166 (1994-09-01), None
patent: 7-71388 (1995-03-01), None
Gennami Hiroyuki
Kuroki Kazuhiro
Sanuki Masami
Tsumagari Yuichi
Denion Thomas
Denso Corporation
Pillsbury & Winthrop LLP
Trieu Theresa
LandOfFree
Compresser with lubricating oil control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compresser with lubricating oil control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compresser with lubricating oil control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2545759