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Title:
METHOD FOR REFRIGERANT AND OIL COLLECTING OPERATION AND REFRIGERANT AND OIL COLLECTION CONTROLLER
Document Type and Number:
WIPO Patent Application WO/2001/084064
Kind Code:
A1
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).

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Inventors:
Taira, Shigeharu c/o Shiga-seisakusho of DAIKIN INDUSTRIES (LTD. 1000-2 Aza Ootan, Okamoto-cho Kusatsu-shi Shiga, 525-0044, JP)
Tanaka, Junichirou c/o Shiga-seisakusho of DAIKIN INDUSTRIES (LTD. 1000-2 Aza Ootan, Okamoto-cho Kusatsu-shi Shiga, 525-0044, JP)
Application Number:
PCT/JP2001/003550
Publication Date:
November 08, 2001
Filing Date:
April 25, 2001
Export Citation:
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Assignee:
DAIKIN INDUSTRIES, LTD. (Umeda Center Building, 4-12 Nakazaki-nishi 2-chom, Kita-ku Osaka-shi Osaka, 530-8323, JP)
Taira, Shigeharu c/o Shiga-seisakusho of DAIKIN INDUSTRIES (LTD. 1000-2 Aza Ootan, Okamoto-cho Kusatsu-shi Shiga, 525-0044, JP)
Tanaka, Junichirou c/o Shiga-seisakusho of DAIKIN INDUSTRIES (LTD. 1000-2 Aza Ootan, Okamoto-cho Kusatsu-shi Shiga, 525-0044, JP)
International Classes:
F25B13/00; F25B45/00; F25B43/02; (IPC1-7): F25B45/00; F25B1/00
Foreign References:
JPH09152233A
JPH09250850A
Other References:
See also references of EP 1278032A1
Attorney, Agent or Firm:
Aoyama, Tamotsu (AOYAMA & PARTNERS IMP Building, 3-7 Shiromi 1-chom, Chuo-ku Osaka-shi Osaka, 540-0001, JP)
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