Refrigeration – Automatic control – Refrigeration producer
Patent
1997-08-04
1999-12-07
Bennett, Henry
Refrigeration
Automatic control
Refrigeration producer
62469, 62510, 417372, F25B 3100
Patent
active
059963638
ABSTRACT:
An air conditioning equipment is provided with an oil level equalizing system, which includes a plurality of low-pressure shell-type compressors communicating with a suction line through a plurality of branch portions, a plurality of connecting lines each communicating with a corresponding compressor shell at a location adjacent to a normal oil level in the shell, and an oil level equalizing line communicating with the plurality of connecting lines. The oil level equalizing system also includes a communication line, through which the suction line communicates with the oil level equalizing line at a location upstream of the plurality of branch portions with respect to a direction of flow of a refrigerant. This arrangement functions to increase the pressure within the oil level equalizing line to a value higher than that within the shell of each compressor. A gas/liquid separator for separating a gas refrigerant and a liquid refrigerant or an oil/gas separator for separating oil from the gas refrigerant may be provided in the suction line upstream of the plurality of branch portions. Alternatively, an accumulator may be provided.
REFERENCES:
patent: 4478050 (1984-10-01), DiCarlo et al.
patent: 4621505 (1986-11-01), Ares et al.
patent: 4672822 (1987-06-01), Iijima et al.
patent: 5321956 (1994-06-01), Kemp et al.
patent: 5327997 (1994-07-01), Nash, Jr. et al.
Kaneko Takashi
Kurachi Masao
Kusaka Michiyoshi
Nakatani Kazuo
Bennett Henry
Masushita Refrigeration Company
Tinker Susanne C.
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