Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2002/010655
Kind Code:
A1
Abstract:
A refrigeration cycle device which prevents refrigerating machine oil delivered during cycle from obstructing heat transfer and from increasing pressure loss, which is small in size and highly efficient, and which uses carbon dioxide gas (CO¿2?). A refrigeration cycle device at least having piping which successively connects a compressor (1), a radiator (2), a pressure reducer (3), and an evaporator (4), and also having a refrigerant circuit for circulating a refrigerant through the compressor (1), radiator (2), pressure reducer (3), evaporator (4) and piping, wherein carbon dioxide gas (CO¿2?) is sealed as the refrigerant, and the amount of oil sealed in the refrigerant circuit is 0 or not more than 40% by weight of the sealed amount of carbon dioxide gas (CO¿2?), whereby a decrease in heat transfer rate and an increase in pressure loss in the heat exchanger can be minimized and influences on the upsizing of heat exchanges, efficiency lowering, etc., almost disappear.
Inventors:
OKAZA NORIHO (JP)
NISHIWAKI FUMITOSHI (JP)
YOSHIDA YUJI (JP)
IKOMA MITSUHIRO (JP)
HASEGAWA HIROSHI (JP)
SHINTAKU HIDENOBU (JP)
NISHIWAKI FUMITOSHI (JP)
YOSHIDA YUJI (JP)
IKOMA MITSUHIRO (JP)
HASEGAWA HIROSHI (JP)
SHINTAKU HIDENOBU (JP)
Application Number:
PCT/JP2001/006521
Publication Date:
February 07, 2002
Filing Date:
July 30, 2001
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
OKAZA NORIHO (JP)
NISHIWAKI FUMITOSHI (JP)
YOSHIDA YUJI (JP)
IKOMA MITSUHIRO (JP)
HASEGAWA HIROSHI (JP)
SHINTAKU HIDENOBU (JP)
OKAZA NORIHO (JP)
NISHIWAKI FUMITOSHI (JP)
YOSHIDA YUJI (JP)
IKOMA MITSUHIRO (JP)
HASEGAWA HIROSHI (JP)
SHINTAKU HIDENOBU (JP)
International Classes:
F25B1/00; C09K5/04; F25B1/02; F25B9/00; F25B31/00; F25B39/02; F25B40/00; F28D1/053; F28D7/00; (IPC1-7): F25B1/00; C10M125/00; F25B39/02
Domestic Patent References:
| WO2000032934A1 | 2000-06-08 |
Foreign References:
| JPH11173688A | 1999-07-02 | |||
| JP2000046421A | 2000-02-18 | |||
| JP2000179959A | 2000-06-30 | |||
| JP2000055488A | 2000-02-25 | |||
| JPS5999079A | 1984-06-07 | |||
| JP2000046420A | 2000-02-18 | |||
| JP2001221580A | 2001-08-17 | |||
| JP2001194081A | 2001-07-17 | |||
| JP2001133075A | 2001-05-18 |
Other References:
PETTERSEN J. ET AL.: "Development of compact heat exchangers for CO2 air-conditioning systems", INTERNATIONAL JOURNAL OF REFRIGERATION, vol. 21, no. 3, 1998, pages 180 - 193, XP002949704
See also references of EP 1306629A4
See also references of EP 1306629A4
Attorney, Agent or Firm:
Matsuda, Masamichi (Miyahara 5-chome Yodogawa-ku Osaka-shi Osaka, JP)
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