Title:
REFRIGERATION CYCLE
Document Type and Number:
WIPO Patent Application WO/2004/109198
Kind Code:
A1
Abstract:
A refrigeration cycle using HFC-152a as a refrigerant ensures stabilized operation without occurrence of the hunting of superheat (SH). The amount of charge of refrigerant is increased so that the refrigerant at the entrance to an expansion device is secured by at least 5 degrees without supercooling (SC) becoming zero even if there is a pressure variation. This suppresses a variation in superheat (SH) of the refrigerant at the exit from an evaporator, stabilizing the system. In order to increase the efficiency of a compressor in this state, the set value for the expansion device is lowered, whereby superheat (SH) can be increased.
Inventors:
KOMATSU SYUNJI (JP)
YAMAMOTO KIYOKAZU (JP)
YAMAMOTO KIYOKAZU (JP)
Application Number:
PCT/JP2004/002329
Publication Date:
December 16, 2004
Filing Date:
February 26, 2004
Export Citation:
Assignee:
SANDEN CORP (JP)
KOMATSU SYUNJI (JP)
YAMAMOTO KIYOKAZU (JP)
KOMATSU SYUNJI (JP)
YAMAMOTO KIYOKAZU (JP)
International Classes:
F25B1/00; F25B9/00; F25B40/02; (IPC1-7): F25B1/00
Foreign References:
| JP2002327969A | 2002-11-15 | |||
| JP2003050061A | 2003-02-21 | |||
| JPH11108511A | 1999-04-23 | |||
| JPH0373866U | 1991-07-25 | |||
| JPH0835745A | 1996-02-06 |
Attorney, Agent or Firm:
Hattori, Kiyoshi (Ge Edison Bldg. Hachioji 9-8, Azuma-cho, Hachioji-sh, Tokyo 82, JP)
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