| CPC F25B 31/004 (2013.01) [F25B 7/00 (2013.01)] | 8 Claims |
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1. A refrigeration apparatus, comprising:
a plurality of refrigeration units each including a compressor, an oil separator, an oil return pipe that returns oil separated from a refrigerant by the oil separator to the compressor, and a heat dissipation heat exchanger that cools the refrigerant from which the oil has been separated;
a pressure reducing valve connected to the heat dissipation heat exchangers of the plurality of refrigeration units; and
an oil return control mechanism that controls a return destination of the oil separated by at least one of the oil separators of the plurality of refrigeration units, wherein
the oil return control mechanism includes:
an oil supply pipe that connects the oil return pipes of the plurality of refrigeration units to each other,
a flow control mechanism disposed in the oil supply pipe, the flow control mechanism controlling a flowing condition of oil in the oil supply pipe, and ejection control mechanisms each disposed in a corresponding one of the oil return pipes at a position closer to a corresponding one of the oil separators than a connection position is, each of the ejection control mechanisms controlling an ejection condition of oil ejected from the corresponding oil separator, the connection position being a position where the corresponding oil return pipe connects to the oil supply pipe,
wherein oil valves, each being configured to control an amount of the oil returned from the oil separator to the compressor by adjusting an opening degree, are provided in the respective oil return pipes.
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