Refrigeration – Processes – Lubricant handling
Reexamination Certificate
2007-05-29
2007-05-29
Ali, Mohammad M. (Department: 3744)
Refrigeration
Processes
Lubricant handling
C062S117000, C062S192000, C062S468000, C062S470000
Reexamination Certificate
active
11139987
ABSTRACT:
An air conditioner including an outdoor unit including a first compressor and a second compressor connected in parallel to the first compressor, an outdoor unit connected in parallel to the outdoor unit, the outdoor unit including a first compressor and a second compressor connected in parallel to the first compressor, the outdoor units being connected in parallel to indoor units, the compressors being connected by first-compressor oil equalizing tubes and second-compressor oil equalizing tubes to feed surplus oil in the compressors, the oil equalizing tubes being connected by an external oil equalizing tube, wherein oil equalization is performed by collecting lubricant oil in the first compressor of the outdoor unit, pressurizing the collected lubricant oil by a discharge pressure of another compressor connected in parallel to the first compressor in the same outdoor unit, that is, the second compressor, and feeding the pressurized lubricant oil into the first compressor or second compressor of the other outdoor unit. Accordingly, it is possible to reduce the oil equalizing operation time. Also, there is no restriction on the length of oil equalizing tubes. Accordingly, an enhancement in reliability is achieved.
REFERENCES:
patent: 3581519 (1971-06-01), Garrett et al.
patent: 3633377 (1972-01-01), Quick
patent: 4478050 (1984-10-01), DiCarlo et al.
patent: 4589263 (1986-05-01), DiCarlo et al.
patent: 5279131 (1994-01-01), Urushihata et al.
patent: 5490399 (1996-02-01), Sada
patent: 5548968 (1996-08-01), Sada
patent: 5553460 (1996-09-01), Isaacs
patent: 5673570 (1997-10-01), Sada
patent: 5996363 (1999-12-01), Kurachi et al.
patent: 6604371 (2003-08-01), Ueno
patent: 6941767 (2005-09-01), Matsuoka et al.
patent: 6986259 (2006-01-01), Takegami et al.
patent: 2000-337726 (2000-12-01), None
patent: 2001-336840 (2001-12-01), None
patent: 1996-001602 (1996-01-01), None
LandOfFree
Air conditioner and method for performing oil equalizing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Air conditioner and method for performing oil equalizing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Air conditioner and method for performing oil equalizing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3778413