Cooling system

Abstract

A cooling system is used for cooling a plurality of electronic components received in a casing. The casing defines an air outlet. The cooling system includes at least one fan received in the casing, an air tachometer, and a controller. The air tachometer is arranged adjacent to the air outlet, and is used for measuring an airflow speed of the air outlet. The controller is electrically connected to the at least one fan and the air tachometer, and used for comparing a threshold value with the airflow speed detected by the air tachometer, and controlling a rotating speed of the at least one fan based on the comparing result.

What is claimed is: 
     
         1 . A cooling system for cooling a plurality of electronic components received in a casing, the casing defining a first air outlet, the cooling system comprising:
 at least one fan received in the casing;   a first air tachometer arranged adjacent to the first air outlet, and configured for measuring an airflow speed of the first air outlet; and   a controller electrically connected to the at least one fan and the first air tachometer, the controller configured for comparing a first threshold value with the airflow speed detected by the first air tachometer, and the controller also configured for controlling a rotating speed of the at least one fan based on the comparing result.   
     
     
         2 . The cooling system of  claim 1 , wherein the cooling system further comprises a first shielding plate and a first driver, the first shielding plate slidably covers the first air outlet, the first driver is configured for driving the first shielding plate to slide to change an opening size of the first air outlet, the controller is electrically connected to the first driver, and is configured for controlling the first driver to drive the first shielding plate to change the opening size of the first air outlet based on the comparing result. 
     
     
         3 . The cooling system of  claim 2 , wherein the casing comprises a first sidewall, a second sidewall opposite to the first sidewall, a third sidewall connecting between the first sidewall and a second sidewall, a fourth sidewall opposite to the third sidewall and connecting between the first sidewall and the second sidewall, and a bottom plate connecting to the first sidewall, the second sidewall, the third sidewall, and the fourth sidewall, the first sidewall defines a plurality of first through holes, the at least one fan is arranged adjacent to the first sidewall and faces the first through holes, the first air outlet is defined on the second sidewall, the bottom plate is configured for fixing the electronic components. 
     
     
         4 . The cooling system of  claim 3 , wherein the cooling system further comprises a sliding device arranged on the second sidewall, the first sliding device comprises a first sliding rail and a second sliding rail parallel to the first sliding rail, the first sliding rail is on a side of the first air outlet away from the bottom plate, and the second sliding rail is one another side of the first air outlet adjacent to the bottom plate, the first shielding plate is slidably positioned between the first sliding rail and the second sliding rail, the first driver is configured for driving the first shielding plate to slide along an extending direction of the first sliding rail and the second sliding rail. 
     
     
         5 . The cooling system of  claim 4 , wherein the first sliding rail defines a U-shaped first sliding slot facing the bottom plate, and has two parallel sidewalls and a stopper connected between the two sidewalls, the stopper is positioned on one end of the first sliding rail, the stopper and the two sidewalls cooperatively define the first sliding slot, one end of the first shielding plate is received in the first sliding slot; the second sliding rail defines a U-shaped second sliding slot, the second sliding slot extends through the second sliding rail; another end of the first shielding plate passes through the second sliding slot and connects to the first driver. 
     
     
         6 . The cooling system of  claim 5 , wherein the first driver comprises a first motor, two wheels, a transmitting loop, and a connecting element, the first motor has a rotating shaft extending through a center of one of the two wheels, the another end of the first shielding plate extends through the second sliding slot and is fixed on the transmitting loop, the connecting element fixes the first shielding plate on the transmitting loop, the first motor is configured for driving the one of the two wheels to rotate, and thus the transmitting loop is capable of driving the first shielding plate to slide along the first sliding rail and the second sliding rail. 
     
     
         7 . The cooling system of  claim 3 , wherein the casing further defines a second air outlet on the third sidewall, the cooling system further comprises a second air tachometer adjacent to the second air outlet and configured for measuring an airflow speed of the second air outlet, the controller is configured for comparing a second threshold value with an airflow speed detected by the second air tachometer, and controlling the rotating speed of the at least one fan based on the comparing result of the second threshold to the airflow speed detected by the second air tachometer, and the comparing result of the first threshold to the airflow speed detected by the first air tachometer; when both of the airflow speeds detected by the first air tachometer and the second air tachometer are respectively larger than the first threshold and the second threshold, the controller reduces the rotating speed of the at least one fan; when both of the airflow speeds detected by the first air tachometer and the second air tachometer are respectively less than the first threshold and the second threshold, the controller increases the rotating speed of the at least one fan. 
     
     
         8 . The cooling system of  claim 7 , wherein the cooling system further comprises a second shielding plate slidably covering the second air outlet for controlling an opening size of the second air outlet, and a second driver for driving the second shielding plate to slide, the controller is electrically connected to the second driver, and is configured for controlling the second driver to drive the second shielding plate to change the opening size of the second air outlet based on the comparing result of the second threshold to the airflow speed detected by the second air tachometer. 
     
     
         9 . The cooling system of  claim 8 , wherein the casing further defines a third air outlet on the fourth sidewall, the cooling system further comprises a third air tachometer adjacent to the third air outlet and configured for measuring an airflow speed of the third air outlet, the controller is configured for comparing a third threshold value with the airflow speed detected by the third air tachometer, and controlling the rotating speed of the at least one fan, based on the comparing result of the third threshold to the airflow speed detected by the third air tachometer, the comparing result of the second threshold to the airflow speed detected by the second air tachometer, and the comparing result of the first threshold to the airflow speed o detected by the first air tachometer; when all of the airflow speeds detected by the first air tachometer, the second air tachometer, and the third air tachometer are respectively larger than the first threshold, the second threshold, and the third threshold, the controller reduces the rotating speed of the at least one fan; when all of the airflow speeds detected by the first air tachometer, the second air tachometer, and the third air tachometer are respectively less than the first threshold, the second threshold, and the third threshold, the controller increases the rotating speed of the at least one fan. 
     
     
         10 . The cooling system of  claim 9 , wherein the cooling system further comprises a third shielding plate slidably covering the third air outlet for controlling an opening size of the third air outlet, and a third driver for driving the third shielding plate to slide, the controller is configured for controlling the third driving device to drive the third shielding plate to slide to change the opening size of the third air outlet, based on the comparing result of the third threshold to the airflow speed detected by the third air tachometer. 
     
     
         11 . The cooling system of  claim 3 , wherein each of the at least one fan has an air inlet surface facing the first through holes and an air outlet surface facing the second sidewall. 
     
     
         12 . The cooling system of  claim 3 , wherein the second sidewall defines a plurality of second through holes adjacent to the third sidewall. 
     
     
         13 . The cooling system of  claim 3 , wherein the third sidewall defines a plurality of third through holes adjacent to the at least one fan. 
     
     
         14 . The cooling system of  claim 3 , wherein the fourth sidewall defines a plurality of fourth through holes adjacent to the at least one fan.