Title:
冷凍装置
Document Type and Number:
Japanese Patent JP4622193
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To assure smooth operation and reliability even in the case of using a fluid machine having a constant internal capacity ratio as an expansion machine, in a refrigerating unit recovering power from a high pressure refrigerant by the expansion machine. SOLUTION: Carbon dioxide is filled in a refrigerant circuit (10) of the refrigerating unit as a refrigerant. In the refrigerating unit, high pressure of a refrigeration cycle is set at a pressure not lower than the critical pressure of carbon dioxide. The circuit (10) has the expansion machine (22) and a motor driven expansion valve (23) provided in series. The expansion machine (22) is constituted of a scroll type fluid machine having a constant internal capacity ratio. The expansion ratio of the machine (22) is constant and does not change, but high pressure of the refrigeration cycle can be set at a value suitable for operation by controlling the opening of the valve (23).
Inventors:
Katsumi Hokoya
Moriwaki Michio
Moriwaki Michio
Application Number:
JP2001262749A
Publication Date:
February 02, 2011
Filing Date:
August 31, 2001
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
F25B1/00; F25B11/02; F25B1/10; F25B9/00; F25B9/06; F25B13/00; F25B41/06; F25B43/00
Domestic Patent References:
| JP59069661A | ||||
| JP57179544A | ||||
| JP2000234814A | ||||
| JP2001066006A | ||||
| JP54116760A | ||||
| JP61110849A | ||||
| JP2001108257A | ||||
| JP2001116371A | ||||
| JP50033369U |
Attorney, Agent or Firm:
Hiroshi Maeda
Hiroshi Koyama
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Teshima Masaru
Atsushi Fujita
Hiroshi Koyama
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Teshima Masaru
Atsushi Fujita