Matsushita Refrigeration Company

Masao Kurachi

Kazuo Nakatani

Michiyoshi Kusaka

Takashi Kaneko

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.

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Ikoma-gun, Japan

Masao Kurachi