Rotation speed control system and control method

Abstract

A rotation speed control system of a fan includes a blade group, a motor driving the blade group to rotate, a temperature sensing unit and a controlling unit. The temperature sensing unit is configured to sense a temperature of a local environment of the fan. The controlling unit is configured to control the motor to rotate at a speed according to the sensed temperature of the local environment and a relationship between the temperature and a motor speed. The disclosure also provides a rotation speed control method of a fan.

What is claimed is: 
     
         1 . A rotation speed control system of a fan comprising:
 a storage unit storing a relationship between a temperature and a motor speed;   a temperature sensing unit sensing a temperature of a local environment of the fan when the fan is activated;   a motor;   a controlling unit controlling the motor to rotate at a speed according to the sensed temperature of the local environment and the relationship between the temperature and the motor speed; and   a blade group driven to rotate by the motor.   
     
     
         2 . The rotation speed control system of a fan as claimed in  claim 1 , wherein the temperature sensing unit periodically senses the temperature of the environment according to a preset period. 
     
     
         3 . The rotation speed control system of a fan as claimed in  claim 2 , wherein the preset period is two hours. 
     
     
         4 . The rotation speed control system of a fan as claimed in  claim 1 , wherein the temperature sensing unit senses the temperature of the environment in real time. 
     
     
         5 . The rotation speed control system of a fan as claimed in  claim 1 , wherein the temperature in the relationship comprises a preset critical temperature, the controlling unit further controls the fan to turn off when the temperature of the environment is below the preset critical temperature. 
     
     
         6 . The rotation speed control system of a fan as claimed in  claim 5 , wherein the preset critical temperature is 25. 
     
     
         7 . The rotation speed control system of a fan as claimed in  claim 1 , further comprising a display unit, the display unit displaying the sensed temperature of the environment. 
     
     
         8 . The rotation speed control system of a fan as claimed in  claim 1 , wherein the temperature in the relationship is from 28-36. 
     
     
         9 . The rotation speed control system of a fan as claimed in  claim 1 , wherein the motor speed in the relationship is from 500 revolutions per minute to 1500 revolutions per minute. 
     
     
         10 . The rotation speed control system of a fan as claimed in  claim 1 , wherein high temperature is corresponding to high motor speed. 
     
     
         11 . A rotation speed control method of a fan comprising:
 sensing a temperature of the environment where the fan is located when the fan is activated;   controlling a motor of the fan to rotate at a speed according to the sensed temperature of the local environment and a relationship between a temperature and a motor speed; and   driving the blade group to rotate by the motor.   
     
     
         12 . The rotation speed control method of a fan as claimed in  claim 11 , wherein periodically senses the temperature of the environment according to a preset period. 
     
     
         13 . The rotation speed control method of a fan as claimed in  claim 12 , wherein the preset period is two hours. 
     
     
         14 . The rotation speed control method of a fan as claimed in  claim 11 , wherein senses the temperature of the environment in real time. 
     
     
         15 . The rotation speed control method of a fan as claimed in  claim 11 , wherein the temperature in the relationship comprises a preset critical temperature. 
     
     
         16 . The rotation speed control method of a fan as claimed in  claim 15 , further comprising:
 controlling the fan to turn off when the temperature of the environment is below the preset critical temperature.   
     
     
         17 . The rotation speed control method of a fan as claimed in  claim 15 , wherein the preset critical temperature is 25. 
     
     
         18 . The rotation speed control method of a fan as claimed in  claim 11 , further comprising:
 displaying the sensed temperature of the environment.   
     
     
         19 . The rotation speed control method of a fan as claimed in  claim 11 , wherein in the relationship, high temperature is corresponding to high motor speed. 
     
     
         20 . The rotation speed control method of a fan as claimed in  claim 11 , wherein the temperature in the relationship is from 28 to 36.