Patents Assigned to Masushita Refrigeration Company
  • Patent number: 5996363
    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.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: December 7, 1999
    Assignee: Masushita Refrigeration Company
    Inventors: Masao Kurachi, Takashi Kaneko, Michiyoshi Kusaka, Kazuo Nakatani