Liquid cooling system for cooling it racks

Abstract

A liquid cooling system includes: a supply liquid outlet and a recovery liquid inlet connected to a server rack; a radiator that receives coolant from the server rack after its temperature rises via the recovery liquid inlet and cools the coolant through multiple fans; a water tank that pumps cooled coolant from the supply liquid outlet to the server rack via a pump; and a controller that, when detecting that the coolant flow rate reaches a first preset value, records the pressure difference between the supply liquid outlet and the recovery liquid inlet as a second preset value. When the liquid cooling system operates in flow control mode and the controller determines that the coolant flow rate is abnormal, it switches to pressure differential control mode and controls the pump operation according to the second preset value.

Claims

1. A liquid cooling system for cooling a servo cabinet, comprising: A liquid supply outlet is connected to a liquid inlet of the servo cabinet; A liquid recovery inlet is connected to a liquid outlet of the servo cabinet; A radiator including multiple fans, wherein the radiator is configured to receive coolant from the server rack after its temperature rises via a recovery liquid inlet, and to operate the multiple fans to cool the coolant; a water tank including at least one pump, wherein the water tank is configured to operate the at least one pump to input the cooled coolant from the supply liquid outlet into the server rack; and a controller configured to detect a flow rate value of the coolant at the recovery liquid inlet or the supply liquid outlet, and to record a pressure difference value between the supply liquid outlet and the recovery liquid inlet as a second set value when the flow rate value reaches a first set value; wherein the liquid cooling system operates in a flow control mode, and the controller is configured to switch to a pressure difference control mode when the at least one pump is operating and the flow rate value at the recovery liquid inlet or the supply liquid outlet is determined to be abnormal, and to control the operation of the at least one pump according to the second set value.

2. The liquid cooling system as claimed in claim 1, further comprising a flow meter located near the supply liquid outlet or near the recovery liquid inlet, configured to detect the flow rate of the coolant.

3. The liquid cooling system as claimed in claim 1, further comprising at least one differential pressure gauge disposed at the supply liquid outlet and the recovery liquid inlet, configured to detect the pressure difference.

4. The liquid cooling system as claimed in claim 1, wherein the controller is configured to determine that the flow rate has reached the first set value when the flow rate falls within an error range of the first set value.

5. The liquid cooling system as claimed in claim 4, wherein the controller is configured to obtain the flow rate value according to a measurement frequency, obtain the current pressure difference value and update the second setting value when the flow rate value falls within the error range of the first setting value, and not update the second setting value when the flow rate value exceeds the error range of the first setting value.

6. The liquid cooling system as claimed in claim 1, wherein the controller is configured to determine that the flow value is abnormal when the pump is operating normally but the flow value is zero, or when the flow value exceeds a normal detection range of a flow meter.

7. A liquid cooling system for cooling a servo cabinet, comprising: A liquid supply outlet is connected to a liquid inlet of the servo cabinet; A liquid recovery inlet is connected to a liquid outlet of the servo cabinet; A radiator including multiple fans, wherein the radiator is configured to receive a coolant from the server rack after its temperature rises via the recovery liquid inlet, and to operate the multiple fans to cool the coolant; a water tank including at least one pump, wherein the water tank is configured to operate the at least one pump to input the cooled coolant from the supply liquid outlet into the server rack. A controller is configured to detect a pressure difference between the coolant at the recovery liquid inlet and the supply liquid outlet, and to record a flow rate of the coolant at the supply liquid outlet or the recovery liquid inlet as a second set value when the pressure difference reaches a first set value; wherein the liquid cooling system operates in a differential pressure control mode, and the controller is configured to switch to a flow rate control mode when the at least one pump is operating and the pressure difference is determined to be abnormal, and to control the operation of the at least one pump according to the second set value.

8. The liquid cooling system as claimed in claim 7, further comprising at least one differential pressure gauge disposed at the supply liquid outlet and the recovery liquid inlet, configured to detect the pressure difference.

9. The liquid cooling system as claimed in claim 7, further comprising a flow meter located near the supply liquid outlet or near the recovery liquid inlet, configured to detect the flow rate of the coolant.

10. The liquid cooling system of claim 7, wherein the controller is configured to determine that the pressure difference has reached the first set value when the pressure difference falls within an error range of the first set value.

11. The liquid cooling system of claim 10, wherein the controller is configured to acquire the pressure difference value according to a measurement frequency, acquire the current flow rate value and update the second setting value when the pressure difference value falls within the error range of the first setting value, and not update the second setting value when the pressure difference value exceeds the error range of the first setting value.

12. The liquid cooling system as claimed in claim 7, wherein the controller is configured to determine that the pressure difference is abnormal when the pressure difference exceeds a normal detection range of a differential pressure gauge used to detect the pressure difference.

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