CPC F25B 43/02 (2013.01) [F25B 5/02 (2013.01); F25B 41/20 (2021.01)] | 7 Claims |
1. A refrigeration cycle device comprising:
a compressor configured to compress a refrigerant containing lubricating oil;
a radiator configured to radiate heat from the refrigerant compressed by the compressor;
an exterior heat exchanger configured to exchange heat between outside air and the refrigerant;
an interior heat exchanger configured to exchange heat between inside air and the refrigerant;
a battery heat exchanger configured to exchange heat between a battery device and the refrigerant;
a refrigerant pipe connecting the compressor, the radiator, the exterior heat exchanger, the interior heat exchanger, and the battery heat exchanger to form a refrigerant flow path;
a switching valve configured to switch between a battery mode in which the refrigerant flows to the battery heat exchanger and a non-battery mode in which the refrigerant bypasses the battery heat exchanger;
a controller configured to control the compressor and the switching valve, wherein
the controller includes
an estimation unit configured to estimate an oil stagnation amount, the oil stagnation amount being an amount of lubricating oil accumulated in the battery heat exchanger in accordance with execution of the non-battery mode,
a determination unit configured to determine whether lubricating oil in the battery heat exchanger needs to be recovered based on the oil stagnation amount, and
an execution unit configured to execute an oil recovery mode for recovery of the lubricating oil in the battery heat exchanger when the determination unit determines that lubricating oil needs to be recovered, and
a counter configured to measure an oil stagnation time, the oil stagnation time being a drive time for which the compressor is driven in the non-battery mode, wherein
the estimation unit estimates that the oil stagnation amount becomes larger as the oil stagnation time becomes longer.
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