Refrigeration – Processes – Lubricant handling
Reexamination Certificate
2004-08-19
2009-12-01
Norman, Marc E (Department: 3744)
Refrigeration
Processes
Lubricant handling
C062S192000, C062S228500, C062S470000
Reexamination Certificate
active
07624583
ABSTRACT:
A refrigeration system comprises a refrigerant circuit (10) in which a compressor (21), an outdoor heat exchanger (24) and an indoor heat exchanger (33) are connected to operate on a refrigeration cycle, and an oil recovery container (40) connected to the suction side of the compressor (21), and carries out a recovery operation for circulating refrigerant through the refrigerant circuit (10) to recover oil into the recovery container (40). The refrigeration system further comprises: a compressor control section (50) for stepwise increasing the operating capacity of the compressor (21) in an initial stage of the recovery operation so that the refrigerant temperature in the low pressure side of the refrigerant circuit (10) reaches or exceeds a predetermined value; and a fan control section (70) for continuously driving an indoor fan (33a) at least during a time period when the compressor (21) is driven. This suppresses an abrupt start-up of the compressor (21) and ensures that refrigerant in the indoor heat exchanger (33) evaporates. Thus, a temperature drop of refrigerant in the low pressure side can be prevented.
REFERENCES:
patent: 5884497 (1999-03-01), Kishita et al.
patent: 6185955 (2001-02-01), Yamamoto
patent: 61-110834 (1986-05-01), None
patent: 7-84971 (1995-09-01), None
patent: 63-73052 (1998-04-01), None
patent: 10-170108 (1998-06-01), None
patent: 2000-337717 (2000-12-01), None
patent: 2001-041613 (2001-02-01), None
Yoshimi Atsushi
Yoshimi Manabu
Birch Stewart Kolasch & Birch, LLP.
Daikin Industries Ltd.
Norman Marc E
LandOfFree
Freezer device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Freezer device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Freezer device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4079289