To secure lubrication of an expander of a refrigeration cycle and to achieve improvement in reliability and improvement in efficiency.
Pressure in a sealed container of a compressor and a pressure in a sealed container of the expander 22 are kept substantially equal to the pressure of a refrigerant compressed by the compressor 21, and lubricant reservoirs 21d, 22d are respectively mounted in the sealed container 21c of the compressor 21 and in the sealed container 22c of the expander 22, and connected to each other by a communicating pipe 23. Thus, the proper amounts of lubricants can be secured in the compressor 21 and the expander 22, respectively, thereby lubricating the sliding portions, and increase in thermal transfer due to circulation of a refrigerant can be prevented to heighten the performance of the refrigerating cycle.
MORIMOTO TAKASHI
IWASHIDA AKIRA
SAWAI KIYOSHI
SHIOTANI MASARU
| JP2007113815A | 2007-05-10 | |||
| JPH0735425A | 1995-02-07 | |||
| JPH0819912B2 | 1996-03-04 |
Hiroki Naito
Daisuke Nagano