Title:
FREEZE CYCLING DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/021137
Kind Code:
A1
Abstract:
The freeze cycling device (100A) is provided with a first compressor (101) that is an integrated expander compressor, a second compressor (102) and a control device (300). When the oil surface (S1) of the first oil bank (13) becomes lower than a prescribed level (L), the control device (300) reduces the rotation speed of the first electric motor (11) by a prescribed amount and increases the rotation speed of the second electric motor (12) by a prescribed amount. It also switches to oil-leveling operation that increases the opening of the bypass valve (70) so that the pressure or temperature of the discharged refrigerant that is led to the radiator (4) through the first tubing (3a) is kept approximately-constant and after a prescribed period elapses after the oil-leveling operation is started, it returns the rotation speeds of the first electric motor (11) and second electric motor (12) and the opening of the bypass valve (70) to the states before the oil-leveling operation was started.
Inventors:
OGATA, Takeshi (())
尾形雄司 (())
TAKAHASHI, Yasufumi (())
高橋康文 (())
MATSUI, Masaru (())
尾形雄司 (())
TAKAHASHI, Yasufumi (())
高橋康文 (())
MATSUI, Masaru (())
Application Number:
JP2009/003978
Publication Date:
February 25, 2010
Filing Date:
August 20, 2009
Export Citation:
Assignee:
PANASONIC CORPORATION (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
OGATA, Takeshi (())
尾形雄司 (())
TAKAHASHI, Yasufumi (())
高橋康文 (())
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
OGATA, Takeshi (())
尾形雄司 (())
TAKAHASHI, Yasufumi (())
高橋康文 (())
International Classes:
F25B1/00; F25B11/02
Attorney, Agent or Firm:
KAMADA, Koichi et al. (8th Fl, UMEDA PLAZA BLDG. ANNEX 4-3-25, Nishitenma, Kita-ku, Osaka-sh, Osaka 47, 〒5300047, JP)
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