Pressure regulator assembly for a coolant distribution unit

The pressure regulator assembly comprising:

• a cylinder having an internal volume;
• and
• a first hollow piston and a second hollow piston slidably connected to the cylinder to split the internal volume into a first volume portion having a cooling fluid, a second volume portion having a driver fluid, and a third volume portion having a compressible matter,
• wherein the first volume portion is fluidically connected to a closed fluid loop of a coolant distribution unit (CDU) to allow a continuous flow of the cooling fluid in the closed fluid loop via the first and second hollow pistons, and
• wherein the second hollow piston is driven by the driver fluid in response to a predefined pressure drop of the cooling fluid in the closed fluid loop during a predefined time period to inject an additional cooling fluid from the first volume portion into the closed fluid loop to restore a pressure level to an operating pressure of the cooling fluid in the closed fluid loop, wherein each of the cooling fluid and the driver fluid is a non-compressible fluid.

A coolant distribution unit (CDU) comprising:

• a closed fluid loop;
• a circulation pump connected to the closed fluid loop for pumping a cooling fluid in the closed fluid loop;
• and
• a pressure regulator assembly comprising:
• a cylinder having an internal volume;
• and
• a first hollow piston and a second hollow piston slidably connected to the cylinder to split the internal volume into a first volume portion having the cooling fluid, a second volume portion having a driver fluid, and a third volume portion having a compressible matter,
• wherein the first volume portion is fluidically connected to the closed fluid loop to allow a continuous flow of the cooling fluid in the closed fluid loop via the first and second hollow pistons, and
• wherein the first hollow piston is reciprocated by the compressible matter to push a portion of the cooling fluid into the closed fluid loop or pull the portion of the cooling fluid into the first volume portion to maintain an operating pressure of the cooling fluid in the closed fluid loop, wherein each of the cooling fluid and the driver fluid is a non-compressible fluid.