| 摘要 |
<p>A hydraulic circuit for an oil cooler is provided to prevent overpressure from being applied to the oil cooler by combing working oil, which is returned from a steering device through a bypass line in an operation of a bypass valve, with working oil, which is returned from a working device. A hydraulic circuit for an oil cooler comprises an oil tank(400), a return line(510) through which working oil passes from a working device to the oil tank, and an oil cooler(300). The oil cooler receives and cools working oil provided through a first cooling line(110) connected to a steering device(100) and a second cooling line(210) connected to a fan motor(200), and thus discharges the working oil into the oil tank. A bypass line(600) connects the first cooling line to the return line. A bypass valve(610) is disposed on the bypass line to open a flow path, which is formed along the bypass line, when a pressure of the first cooling line exceeds a predetermined value and is larger than a pressure of the return line.</p> |
