Title:
冷凍装置
Document Type and Number:
Japanese Patent JP4363483
Kind Code:
B2
Abstract:
During a coolant feeding operation for feeding a coolant to a coolant circuit (20) while a freezing cycle is performed so that a use side heat exchanger (37) operates as an evaporator in the coolant circuit (20), valve control means (53) for controlling an open degree of an expansion valve (18) judges whether the expansion valve (18) is in a closed state according to a state of a low-pressure side coolant between the expansion valve (18) and a compressor (30) when the open degree instruction value is equal to a lower limit instruction value. If the judgment indicates that the expansion valve (18) is in the closed state, the valve control means (53) corrects the lower limit instruction value to a greater value.
Inventors:
Mikio Kagawa
Atsushi Okamoto
Takuya Kotani
Atsushi Okamoto
Takuya Kotani
Application Number:
JP2007311303A
Publication Date:
November 11, 2009
Filing Date:
November 30, 2007
Export Citation:
Assignee:
Daikin Industries, Ltd.
International Classes:
F25B45/00; F25B1/00; F25B5/02
Domestic Patent References:
| JP2007292428A | ||||
| JP5118670A | ||||
| JP11159893A | ||||
| JP2001194029A | ||||
| JP9243137A | ||||
| JP2003329698A |
Attorney, Agent or Firm:
Hiroshi Maeda
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Atsushi Fujita
Kazunari Ninomiya
Tomoo Harada
Iseki Katsumori
Seki Kei
Yasuya Sugiura
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Atsushi Fujita
Kazunari Ninomiya
Tomoo Harada
Iseki Katsumori
Seki Kei
Yasuya Sugiura