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Patent Searching and Data


Title:
REFRIGERATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2008/032581
Kind Code:
A1
Abstract:
A refrigeration device having a refrigerant circuit formed by sequentially connecting a compressor, a radiator, a first expansion valve, a liquid receiver, a second expansion valve, and an evaporator, in which the level of refrigerant liquid in the liquid receiver can be stably controlled even if a high-pressure side refrigerant is in a subcritical state. The refrigeration device (1, 101) has a compression mechanism (11), a radiator (13), a first expansion mechanism (15), a liquid receiver (16), a second expansion mechanism (17, 33a, 33b), an evaporator (31, 31a, 31b), a temperature detection section (22), a first pressure storage section (23a), a second pressure decision section (23b), a pressure detection section (21), and a control section (23c). The first pressure storage section stores upper and lower limit values of a first pressure range. The second pressure decision section decides upper and lower limit values of a high-pressure range based on upper and lower limit values of an intermediate-pressure range and on temperature in the vicinity of the exit of the radiator. The control section controls the first expansion mechanism and the second expansion mechanism so that pressure detected by the pressure detection section is not more than the upper limit value of and not less than the lower limit value of the high-pressure range.

Inventors:
KURIHARA TOSHIYUKI (JP)
KASAHARA SHINICHI (JP)
Application Number:
PCT/JP2007/066861
Publication Date:
March 20, 2008
Filing Date:
August 30, 2007
Export Citation:
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Assignee:
DAIKIN IND LTD (JP)
KURIHARA TOSHIYUKI (JP)
KASAHARA SHINICHI (JP)
International Classes:
F25B1/00; F25B43/00
Foreign References:
JP2001133058A2001-05-18
JP2005351537A2005-12-22
JP2000337722A2000-12-08
JP2006343017A2006-12-21
JPH10115470A1998-05-06
Other References:
See also references of EP 2068095A4
Attorney, Agent or Firm:
ONO, Yukio et al. (South Forest Bldg. 1-4-19, Minamimori-machi, Kita-ku, Osaka-sh, Osaka 54, JP)
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