Liquid cooling system and method for preventing leakage thereof

Abstract

The present invention provides a liquid cooling system and a method for preventing leakage thereof. The liquid cooling system comprises: an enclosed cooling liquid circulating assembly with cooling liquid flowing circularly and air above the cooling liquid provided therein; a vacuum pump leading to the air in the enclosed cooling liquid circulating assembly; and a vacuum gauge for measurement of a pressure of the air in the enclosed cooling liquid circulating assembly, wherein the vacuum pump is turned on when the measured pressure is higher than a predetermined pressure, and the vacuum pump is turned off when the measured pressure is not more than the predetermined pressure; wherein the predetermined pressure is set to ensure that the pressure of the cooling liquid is not higher than the atmospheric pressure.

What is claimed is: 
     
         1 . A liquid cooling system, comprising:
 an enclosed cooling liquid circulating assembly with cooling liquid flowing circularly and air above the cooling liquid provided therein;   a vacuum pump leading to the air in the enclosed cooling liquid circulating assembly; and   a vacuum gauge for measurement of a pressure of the air in the enclosed cooling liquid circulating assembly,   wherein the vacuum pump is turned on when the measured pressure is higher than a predetermined pressure, and the vacuum pump is turned off when the measured pressure is not higher than the predetermined pressure;   wherein the predetermined pressure is set to ensure that the pressure of the cooling liquid is not higher than an atmospheric pressure.   
     
     
         2 . The liquid cooling system according to  claim 1 , wherein the predetermined pressure is set to ensure that a highest pressure of the cooling liquid is not higher than the atmospheric pressure. 
     
     
         3 . The liquid cooling system according to  claim 2 , wherein the highest pressure of the cooling liquid is a pressure at a lowest point of the cooling liquid. 
     
     
         4 . The liquid cooling system according to  claim 1 , wherein the liquid cooling system further comprises a controller, wherein:
 an input terminal of the controller is connected to a signal output terminal of the vacuum gauge and a first output terminal of the controller is connected to a controlling terminal of the vacuum pump; and   the controller controls a controlling signal of the first output terminal according to an output signal from the signal output terminal so as to control the turning on and the turning off of the vacuum pump.   
     
     
         5 . The liquid cooling system according to  claim 4 , wherein the output signal is an analog signal corresponding to the measured pressure. 
     
     
         6 . The liquid cooling system according to  claim 4 , wherein the output signal is an on-off signal which switches depending on whether the measured pressure is higher or not higher than the predetermined pressure. 
     
     
         7 . The liquid cooling system according to  claim 4 , wherein the liquid cooling system further comprises an alarm device connected to a second output terminal of the controller, and when a frequency with which the vacuum pump is turned on is higher than a predetermined frequency, the controller controls the alarm device to raise an alarm via the second output terminal. 
     
     
         8 . The liquid cooling system according to  claim 7 , wherein the predetermined frequency is set to be higher than once per minute. 
     
     
         9 . The liquid cooling system according to  claim 1 , wherein the enclosed cooling liquid circulating assembly comprises:
 an enclosed cooling liquid circulating passage including a plurality of cooling liquid tubes connected in sequence;   a cooling liquid box connected in the enclosed cooling liquid circulating passage and located on a top part of the enclosed cooling liquid circulating assembly; and   a cooling liquid pump connected in the enclosed cooling liquid circulating passage, wherein a cooling liquid inlet of the cooling liquid pump is connected to a cooling liquid outlet of the cooling liquid box.   
     
     
         10 . The liquid cooling system according to  claim 9 , wherein the enclosed cooling liquid circulating assembly further comprises a heat-exchanging device, wherein
 the heat-exchanging device is connected in the enclosed cooling liquid circulating passage and a cooling liquid inlet of the heat-exchanging device is connected to a cooling liquid outlet of the cooling liquid pump.   
     
     
         11 . The liquid cooling system according to  claim 10 , wherein the enclosed cooling liquid circulating assembly further comprises a radiator, wherein
 the radiator is connected in the enclosed cooling liquid circulating passage and a cooling liquid inlet of the radiator is connected to a cooling liquid outlet of the heat-exchanging device.   
     
     
         12 . The liquid cooling system according to  claim 1 , wherein an air inlet of the vacuum pump leads to the air and a measurement gauge head of the vacuum gauge is connected to the air inlet of the vacuum pump. 
     
     
         13 . The liquid cooling system according to  claim 1 , wherein the cooling liquid is water. 
     
     
         14 . A method for preventing leakage of a liquid cooling system, comprising:
 measuring a pressure of air above a cooling liquid in a liquid cooling system;   judging whether the measured pressure is higher than a predetermined pressure, and when the measured pressure is higher than the predetermined pressure, vacuumizing the liquid cooling system until the pressure of the air is not higher than the predetermined pressure,   wherein the predetermined pressure is set to ensure that the pressure of the cooling liquid is not higher than an atmospheric pressure.   
     
     
         15 . The method according to  claim 14 , wherein the predetermined pressure is set to ensure that a highest pressure of the cooling liquid is not higher than the atmospheric pressure. 
     
     
         16 . The method according to  claim 14 , wherein the highest pressure of the cooling liquid is a pressure at a lowest point of the cooling liquid. 
     
     
         17 . The method according to  claim 14 , wherein an alarm is raised when a frequency with which the vacuumizing is performed is higher than a predetermined frequency. 
     
     
         18 . The method according to  claim 17 , wherein the predetermined frequency is set to be higher than once per minute.