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Title:
MULTILEVEL REFRIGERATING DEVICE
Document Type and Number:
Japanese Patent JP2006349279
Kind Code:
A
Abstract:

To provide a multilevel refrigerating device of high reliability that is operated stably as it is capable of preventing a liquid refrigerant from accumulating in a low-level liquid receiving container even if the volume of the low-level liquid receiving container is small.

In a multilevel refrigerating device having a liquid-filled-type cooler 11 in a low-level refrigerating cycle 2, an on-off valve 17 is provided in a portion of a low-pressure branch pipe 16 connected to a portion of the low-pressure refrigerant pipe 12 of the low-level refrigerating cycle 2 at one end and to a pressure protection container 14 at the other end, the on-off valve 17 being open normally, being closed when the amount of liquid refrigerant retained in the low-level liquid receiving container 9 is equal to or greater than a set value, and being open again when the amount of liquid refrigerant retained in the low-level liquid receiving container 9 drops to less than the preset value because of the feed of the liquid refrigerant into the cooler 11.


Inventors:
NISHIHARA MASAHIRO
TANAKA SADAHIRO
TASHIRO HIDEFUMI
Application Number:
JP2005000177188
Publication Date:
December 28, 2006
Filing Date:
June 17, 2005
Export Citation:
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Assignee:
TOYO SEISAKUSHO KK
International Classes:
F25B7/00
Domestic Patent References:
JP2002277069A2002-09-25
JP2003161551A2003-06-06
JPS5073963U1975-06-28
JPH05340619A1993-12-21
JP2005077042A2005-03-24
JP2002364954A2002-12-18
JPS5073965U1975-06-28
JPH05302763A1993-11-16
Attorney, Agent or Firm:
Kato Tsunehisa