| 摘要 |
PROBLEM TO BE SOLVED: To provide an oil temperature control method and an oil temperature control device therefor capable of improving the warming-up property of a machine to be lubricated. SOLUTION: In this oil temperature control method in which the oil circulated in the machine 1 to be lubricated is heat-exchanged by a heat exchanger with a refrigerant, the refrigerant temperature is compared with the oil temperature, the oil is allowed to flow in the heat exchanger 2 if the refrigerant temperature is higher, or the oil is allowed to flow in a bypass passage bypassing the heat exchanger 2 if the oil temperature is higher. The oil temperature control device comprises a bypass passage 4 bypassing the heat exchanger 2, a comparing means 101 for comparing the refrigerant temperature with the oil temperature, and an oil control means 6 in which oil is allowed to flow in the heat exchanger 2 if the refrigerant temperature is higher and oil is allowed to flow in the bypass passage bypassing the heat exchanger 2 if the oil temperature is higher based on the comparing means.
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