Refrigeration – Processes – Lubricant handling
Reexamination Certificate
2007-02-20
2007-02-20
Doerrler, William C. (Department: 3744)
Refrigeration
Processes
Lubricant handling
C062S085000, C062S474000, C062S475000, C062S468000
Reexamination Certificate
active
10258793
ABSTRACT:
A method for refrigerant and oil collecting operation capable of assuring the cleanliness of the inside of an existing communication pipe at a low cost and installing, at a low cost, a new air conditioner, comprising a compressor (1), a heat source side heat exchanger (3), a decompressing mechanism (4), and a user side heat exchanger (5), comprising the steps of performing a pipe heating operation in a heating operation mode and performing a refrigerant and oil collecting operation to collect refrigerant to a heat source side heat exchanger (3), namely, with the refrigerant heated to a temperature higher than that where contaminants such as refrigerator oil inside a refrigerant circuit is dissolved into the refrigerant, performing the refrigerant and oil collecting operation so as to assure the cleanliness of the inside of the existing communication pipes (7, 8).
REFERENCES:
patent: 3948679 (1976-04-01), Lewis
patent: 4175614 (1979-11-01), Huggins
patent: 4474034 (1984-10-01), Avery, Jr.
patent: 4505758 (1985-03-01), Carson
patent: 5638690 (1997-06-01), Berglöf
patent: 5689962 (1997-11-01), Rafalovich
patent: 5727396 (1998-03-01), Boyd et al.
patent: 5806329 (1998-09-01), Taira et al.
patent: 6164080 (2000-12-01), Mika et al.
patent: 0 787 958 (1997-08-01), None
patent: 0 852 324 (1998-07-01), None
patent: 0 952 407 (1999-10-01), None
patent: 2-140574 (1990-05-01), None
patent: 9-152233 (1997-06-01), None
patent: 9-250850 (1997-09-01), None
patent: 2000-55514 (2000-02-01), None
Taira Shigeharu
Tanaka Jun-ichirou
Birch, Stewart, Kolasch and Birch LLP
Daikin Industries Ltd.
Doerrler William C.
LandOfFree
Method for refrigerant and oil collecting operation and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for refrigerant and oil collecting operation and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for refrigerant and oil collecting operation and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3813447