Title:
REFRIGERATING CYCLE
Document Type and Number:
WIPO Patent Application WO/1999/034156
Kind Code:
A1
Abstract:
A refrigerating cycle, wherein supercritical fluid is used as refrigerant and an internal heat exchanger is installed for heat-exchanging refrigerant between the outlet side of a gas cooler and the inlet side of a compressor, having a regulating means which regulates the amount of heat exchange of the internal heat exchanger (4) and comprises a bypass passage (9) to bypass the internal heat exchanger (4) and a flow control valve (10) to control the flow rate of refrigerant through the bypass passage (9). The flow control valve (10) uses a solenoid valve which determines the opening based on the information on cycle conditions and a bellows type control valve which responds to a pressure on the high pressure side, and the regulating means may change the length of the passage used for heat exchange in the internal heat exchanger (4). A cycle balance is controlled to maintain an optimum high pressure and attain a satisfactory cycle efficiency. The refrigerating cycle can be protected temporarily against the excessive rise of high pressure and delivery side temperature of a compressor.
Inventors:
FURUYA SHUNICHI (JP)
KANAI HIROSHI (JP)
KANAI HIROSHI (JP)
Application Number:
PCT/JP1998/005678
Publication Date:
July 08, 1999
Filing Date:
December 16, 1998
Export Citation:
Assignee:
ZEXEL CORP (JP)
FURUYA SHUNICHI (JP)
KANAI HIROSHI (JP)
FURUYA SHUNICHI (JP)
KANAI HIROSHI (JP)
International Classes:
F25B9/00; F25B40/00; F25B1/00; F25B41/04; (IPC1-7): F25B1/00; F25B9/00
Foreign References:
| JPH0949662A | 1997-02-18 | |||
| JPH08110104A | 1996-04-30 | |||
| JPH0718602A | 1995-01-20 |
Other References:
See also references of EP 1043550A4
Attorney, Agent or Firm:
Onuki, Kazuyasu (Shibuya 1-chome Shibuya-ku Tokyo, JP)
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