Water supply system of refrigeration device of roll-on-roll-off ship

The utility model discloses a water supply system for a refrigeration device of a roll-on-roll-off ship, which comprises a low-temperature expansion water tank, a low-temperature cooling water delivery pump set, a central cooler unit, a refrigeration device cooling water booster pump and a refrigeration device which are sequentially connected through pipelines along the flowing direction of low-temperature cooling water, a cooling water inlet of the refrigeration device is connected with a refrigeration device cooling water booster pump through a refrigeration device inlet pipeline, and a cooling water outlet of the refrigeration device is communicated with a pipeline located between the low-temperature expansion water tank and the low-temperature cooling water conveying pump set through a refrigeration device outlet pipeline. A first electromagnetic valve and a second electromagnetic valve are respectively arranged on the refrigerating device inlet pipeline and the refrigerating device outlet pipe, and the f