| CPC H05K 7/20327 (2013.01) [H05K 7/20818 (2013.01)] | 20 Claims |
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1. A cooling system for a server rack, comprising:
an internal cooler comprising an input to receive a fluid in vapor form, an output to deliver the fluid in liquid form to a plurality of server chassis within the server rack, and a liquid cooling loop that is fluidly isolated from and thermally coupled to the fluid in the internal cooler, wherein the liquid cooling loop is coupled to a liquid pump; and
a separation container, including a first separation container and a second separation container, wherein
the first separation container comprises an input that directly receives the fluid in the liquid form from the internal cooler in the liquid form, and a plurality of second inputs that are each fluidly connected to a respective output of the plurality of server chassis to receive the fluid in a mix of the liquid form and the vapor form, and
the second separation container comprises a first input that is fluidly connected to an external cooler to receive the fluid in the liquid form, a first output that is fluidly connected to the external cooler to provide the fluid to the external cooler in the vapor form, a second output that is fluidly connected to the input of the internal cooler to provide the fluid in the vapor form to the internal cooler, and a valve that is fluidly arranged in the separation container, the valve being fluidly coupled to the external cooler through the first input, to the mix of the fluid of the liquid form and the vapor form that is inside the second separation container, and to the plurality of server chassis within the server rack,
wherein a fluid line between the first separation container and the second separation container delivers the mix of the fluid in the liquid form and the vapor form from the first separation container to the second separation container; and
a controller configured to control the valve to
supply the fluid to the plurality of server chassis with the fluid only when received from the external cooler in response to a sensed level of the fluid within the second separation container being below a threshold,
supply the fluid to the plurality of server chassis with only the mix of the fluid in the liquid form and the vapor form from inside the second separation container in response to the sensed level of the fluid within the second separation container being at or above the threshold, and
control the liquid pump to increase flow of a cooling liquid through the cooling loop of the internal cooler, in response to the sensed level of the fluid in the second separation container being below the threshold, which cools the fluid in the internal cooler to the liquid form which flows from the internal cooler directly to the first separation container.
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