Heat disspation device and control method

Abstract

A heat dissipation device for cooling a heat generating component, includes a fins module, a heat pipe, a fan, at least two temperature sensors, and a control system. The heat pipe includes an evaporation section absorbing heat from the heat generating component, and a condensation section thermally connected to the fins module. The fan is for driving airflow towards the fins module. The at least two temperature sensors are arranged on the evaporation section of the heat pipe, for continuously sensing temperatures of their respective positions on the heat pipe. The control system adjusts the speed of the fan and/or the operating power of the heat generating component according to the sensed temperatures of the at least two temperature sensors. A method for controlling the heat dissipation device is also provided.

1 . A heat dissipation device for cooling a heat generating component, comprising:
 a fins module;   a heat pipe comprising an evaporation section for absorbing heat of the heat generating component, and a condensation section thermally connected to the fins module;   a fan for driving airflows to flow towards the fins module;   at least two temperature sensors arranged on the evaporation section of the heat pipe, the at least two temperature sensors being for continuously sensing temperatures of their respective positions on the heat pipe to get sensed temperatures; and   a controlling system for adjusting a speed of the fan and/or an operating power of the heat generating component according to the sensed temperatures of the at least two temperature sensors.   
     
     
         2 . The heat dissipation device of  claim 1 , wherein the controlling system compares the sensed temperatures with a first predetermined temperature, and adjust the speed of the fan and/or an operating power of the heat generating component according to the comparison. 
     
     
         3 . The heat dissipation device of  claim 2 , wherein the controlling system increases the speed of the fan in condition that anyone the sensed temperatures is higher than the first predetermined temperature. 
     
     
         4 . The heat dissipation device of  claim 3 , wherein the controlling system compares a difference between the sensed temperatures from the at least two temperature sensors with a first predetermined temperature difference, and decreases the speed of the fan in condition that the difference between the sensed temperatures is larger than the first predetermined temperature difference. 
     
     
         5 . The heat dissipation device of  claim 4 , wherein the controlling system compares the sensed temperatures with a second predetermined temperature, and decreases the operating power of the heat generating component in condition that anyone of the sensed temperatures is higher than the second predetermined temperature. 
     
     
         6 . A method for cooling a heat generating component, comprising:
 providing a heat dissipation device with a heat pipe and a fan, and attaching an evaporation section of the heat pipe to the heat generating component;   getting sensed temperatures of different positions on the evaporation section of the heat pipe;   adjusting a speed of the fan and/or an operating power of the heat generating component according to the sensed temperatures.   
     
     
         7 . The method of  claim 6 , wherein the sensed temperatures are compared with a first predetermined temperature, and the speed of the fan and/or an operating power of the heat generating component is/are adjusted according to the comparison. 
     
     
         8 . The method of  claim 7 , wherein the speed of the fan is increased in condition that anyone the sensed temperatures are higher than the first predetermined temperature. 
     
     
         9 . The method of  claim 8 , wherein a difference between the sensed temperatures from the at least two temperature sensors is compared with a first predetermined temperature difference, and the speed of the fan is decreased in condition that the difference between the sensed temperatures is larger than the first predetermined temperature difference. 
     
     
         10 . The method of  claim 9 , wherein the sensed temperatures are compared with a second predetermined temperature, and the operating power of the heat generating component is decreased in condition that anyone of the sensed temperatures is higher than the second predetermined temperature.