To provide a binary refrigeration device that, for example, prevents abnormal pressure rise during stop of a low-temperature refrigeration cycle, and can improve reliability.
A binary refrigeration device includes: a high-temperature refrigeration cycle 20 that connects a high-temperature side compressor 21, a high-temperature side condenser 22, a high-temperature side expansion valve 23 and a high-temperature side evaporator 24 with pipe, and constitutes a high-temperature side refrigeration circuit; a low-temperature refrigeration cycle 10 that connects a low-temperature side compressor 11, a low-temperature side condenser 12, a low-temperature side liquid receiver 13, a low-temperature expansion valve 14 and a low-temperature side evaporator 15 with pipe, and constitutes a low-temperature side refrigeration circuit; a cascade condenser 30 having the high-temperature side evaporator 24 and the low-temperature side condenser 12; a liquid receiver heat exchange part 25 that cools the low-temperature side liquid receiver 13; and a high-temperature refrigeration cycle controller 32 that on the basis of the pressure of a low-temperature side refrigerant, when it is estimated that the low-temperature side refrigerant becomes a supercritical state during stop of the low-temperature side compressor 11, performs control so as to activate the high-temperature side compressor 21.
ISHIKAWA TOMOTAKA
SUGIMOTO TAKESHI
YAMASHITA TETSUYA
IKEDA TAKASHI
| JP2003004321A | 2003-01-08 | |||
| JP2012087978A | 2012-05-10 | |||
| JP2005077042A | 2005-03-24 | |||
| JP2009174802A | 2009-08-06 | |||
| JP2007155316A | 2007-06-21 | |||
| JP2004190917A | 2004-07-08 | |||
| JP2008267621A | 2008-11-06 | |||
| JP2003004321A | 2003-01-08 |
Kiyoshi Yasushima
Takanashi Norio
Motoki Shandong
Taku Ogawa
Murata Kensei
Moto Otani