Title:
REFRIGERATION UNIT
Document Type and Number:
WIPO Patent Application WO/2013/073064
Kind Code:
A1
Abstract:
Provided is a refrigeration unit that is capable of ensuring oil separation efficiency and a quantity of stored oil, and of preventing poor lubrication in compressors, without increasing the volume of an oil separator. The refrigeration unit is configured in such a manner that: an oil tank (61) having a prescribed volume, which stores oil that has been separated by the oil separator (22), is provided, and the oil stored in the oil tank (61) passes through oil return tubes (28, 28A) and returns to the inside of cases (12) of the compressors (11); and motor-operated valves (30) that adjust the openings of the oil return tubes (28A) are provided, and the degree to which the motor-operated valves (30) open is adjusted in response to the operating frequency of the compressors (11).
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Inventors:
SASAKI HIDETAKA (JP)
OTAKE MASAHISA (JP)
HASEGAWA SETSU (JP)
KOYAMA KIYOSHI (JP)
KOBAYASHI TAKAHIRO (JP)
NISHIKAWA HIROSHI (JP)
MIHARA KAZUHIKO (JP)
KAWAKUBO KEN (JP)
TADANO MASAYA (JP)
OTAKE MASAHISA (JP)
HASEGAWA SETSU (JP)
KOYAMA KIYOSHI (JP)
KOBAYASHI TAKAHIRO (JP)
NISHIKAWA HIROSHI (JP)
MIHARA KAZUHIKO (JP)
KAWAKUBO KEN (JP)
TADANO MASAYA (JP)
Application Number:
PCT/JP2011/078403
Publication Date:
May 23, 2013
Filing Date:
December 08, 2011
Export Citation:
Assignee:
SANYO ELECTRIC CO (JP)
SASAKI HIDETAKA (JP)
OTAKE MASAHISA (JP)
HASEGAWA SETSU (JP)
KOYAMA KIYOSHI (JP)
KOBAYASHI TAKAHIRO (JP)
NISHIKAWA HIROSHI (JP)
MIHARA KAZUHIKO (JP)
KAWAKUBO KEN (JP)
TADANO MASAYA (JP)
SASAKI HIDETAKA (JP)
OTAKE MASAHISA (JP)
HASEGAWA SETSU (JP)
KOYAMA KIYOSHI (JP)
KOBAYASHI TAKAHIRO (JP)
NISHIKAWA HIROSHI (JP)
MIHARA KAZUHIKO (JP)
KAWAKUBO KEN (JP)
TADANO MASAYA (JP)
International Classes:
F25B1/00; F25B43/02
Domestic Patent References:
WO2007039951A1 | 2007-04-12 |
Foreign References:
JP2011007351A | 2011-01-13 | |||
JPH0439574A | 1992-02-10 | |||
JP2011117626A | 2011-06-16 |
Attorney, Agent or Firm:
KUSHIBUCHI & ASSOCIATES (JP)
Patent business corporation クシブチ international patent firm (JP)
Patent business corporation クシブチ international patent firm (JP)
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Claims: