To provide an inexpensive refrigerating device preventing outflow of lubricating oil to a halt side compressor during operation of a main compressor and reducing a suction pressure loss so as to improve a refrigerating capacity.
In the refrigerating device 1, a first compressor 2 and a second compressor 3 operated separately one by one via an accumulator 9 having a plurality of refrigerant outflow pipes 15, 16 are connected to a refrigerating cycle in parallel, and the first compressor 2 and the second compressor 3 serve as the main compressor with high use frequency and a stand-by compressor with low use frequency, respectively. The first refrigerant outflow pipe 15 out of the plurality of refrigerant outflow pipes 15, 16 is structured of a U-tube having an oil return hole 17 formed in a lower portion, and is connected to suction piping 10A of the first compressor 2. The second refrigerant outflow pipe 16 is structured of an outflow pipe connected to the upper part of the accumulator 9 and having no liquid trap part, and is connected to suction piping 10B of the second compressor 3.
| JPH03105160 | SCREW TYPE FREEZER |
| JP3983517 | Cooling system with phase separation |
| WO/2015/009323 | HYBRID POWERED COOLING UNIT |
KAI MASAKAZU
OSADA KAZUMI
| JP2009008361A | 2009-01-15 | |||
| JP2003130474A | 2003-05-08 | |||
| JPH10170078A | 1998-06-26 | |||
| JPH08110127A | 1996-04-30 | |||
| JP2003028523A | 2003-01-29 | |||
| JPH1073330A | 1998-03-17 | |||
| JPH0182465U | 1989-06-01 | |||
| JP2002081801A | 2002-03-22 | |||
| JP2006010175A | 2006-01-12 |
Kunio Ueda