Circulative cooling system and method for controlling circulation in the cooling system

A circulative cooling system, comprising an internal cooling circulative device, a plate heat exchanger and an external cooling circulative device, wherein the external cooling cirulative device comprises an external cooling primary circulation pump and a cold-accumulation water pool, a water-air plate wing heat exchanger, a cold-accumulation air cooler, and a first valve and a second valve, wherein:

• the internal cooling circulative device is adapted to circulatingly cool a heat-generating device;
• the plate heat exchanger is adapted to perform heat exchange between external cooling water from the external cooling circulating device and internal cooling water from the internal cooling circulative device;
• the external cooling circulative device is adapted to cool the external cooling water, wherein in the external cooling circulative device;
• the external cooling primary circulation pump is adapted to drive the external cooling water to circulate in the external cooling circulation device;
• the cold accumulation water pool is adapted to store and cool the external cooling water,
• and receive the external cooling water from the plate heat exchanger;
• the water-air plate-wing heat exchanger is adapted to cool the external cooling water from the cold accumulation water pool, and supply the external cooling water to the cold accumulation air cooler;
• the cold accumulation air cooler is adapted to cool the external cooling water from the water-air plate-wing heat exchanger, and supply the external cooling water to the plate heat exchanger;
• the first valve is adapted to control the supplying of the external cooling water stored in the cold accumulation water pool to the plate heat exchanger;
• the second valve is adapted to control the supplying of the external cooling water stored in the cold accumulation water pool to the water-air plate-wing heat exchanger.