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)
KASAHARA SHINICHI (JP)
Application Number:
PCT/JP2007/066861
Publication Date:
March 20, 2008
Filing Date:
August 30, 2007
Export Citation:
Assignee:
DAIKIN IND LTD (JP)
KURIHARA TOSHIYUKI (JP)
KASAHARA SHINICHI (JP)
KURIHARA TOSHIYUKI (JP)
KASAHARA SHINICHI (JP)
International Classes:
F25B1/00; F25B43/00
Foreign References:
JP2001133058A | 2001-05-18 | |||
JP2005351537A | 2005-12-22 | |||
JP2000337722A | 2000-12-08 | |||
JP2006343017A | 2006-12-21 | |||
JPH10115470A | 1998-05-06 |
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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