Refrigerant distribution device, cooling system, and refrigerant distribution method in refrigerant distribution

1. A refrigerant distribution method for a refrigerant distribution device including a distribution vessel in which a refrigerant liquid flows, a refrigerant inflow pipe that is connected to a top portion of the distribution vessel and is configured to be supplied with a refrigerant liquid, a first refrigerant outflow pipe that is connected to a bottom portion of the distribution vessel and is configured to discharge the refrigerant liquid to one heat receiver, a second refrigerant outflow pipe that is connected to the bottom portion of the distribution vessel and is configured to discharge the refrigerant liquid to another heat receiver, and a flow channel switching valve that is disposed in the distribution vessel and is configured to switch a passage of the refrigerant liquid to one of the first and second refrigerant outflow pipes, the refrigerant distribution method comprising:

using the flow channel switching valve to cause the refrigerant liquid to exit the distribution vessel through the first refrigerant outflow pipe if an amount of the refrigerant liquid in the one heat receiver does not reach a reference amount of liquid; and

cutting off the passage communicating with the first refrigerant outflow pipe and using the flow channel switching valve to cause the refrigerant liquid to exit the distribution vessel through the second refrigerant outflow pipe if the amount of the refrigerant liquid in the one heat receiver reaches the reference amount of liquid,

wherein the flow channel switching valve includes a partition plate that is disposed in the distribution vessel to vertically partition an inside of the distribution vessel and a float that is located below the partition plate and has a buoyant force generated by the refrigerant liquid, and

wherein, in the cutting off the passage communicating and the using the flow channel switching valve if the amount of the refrigerant liquid in the one heat receiver reaches the reference amount of liquid, the float contacts the partition plate located above and the passage communicating with the first refrigerant outflow pipe is switched to the second refrigerant outflow pipe.

2. The refrigerant distribution method according to claim 1 , wherein the distribution vessel is formed as a cylindrical body centered on an axis along a vertical direction,

wherein the second refrigerant outflow pipe is internally fitted to the distribution vessel and is disposed to have a gap portion from an inner wall of the distribution vessel, and

wherein the float is disposed in the gap portion between the inner wall of the distribution vessel and the second refrigerant outflow pipe.

3. The refrigerant distribution method according to claim 2 , wherein the partition plate is disposed to close a top portion of the second refrigerant outflow pipe located in the distribution vessel,

wherein a first flow channel opening is formed in the partition plate, a second flow channel opening is formed in the top portion of the second refrigerant outflow pipe, and a third flow channel opening is formed in the float, and

wherein, if the amount of the refrigerant liquid in the one heat receiver reaches the reference amount of liquid and the float comes in contact with the partition plate, then the float cuts off the passage communicating with the first refrigerant outflow pipe, and the first flow channel opening, the second flow channel opening, and the third flow channel opening communicate with the second refrigerant outflow pipe.

4. The refrigerant distribution method according to claim 1 , wherein the flow channel switching valve is operated by the float, and the float floats in the refrigerant liquid in the distribution vessel.