Fan system and temperature-sensing module

Abstract

A fan system, which receives an input voltage from exterior, includes a first fan module, a second fan module, a first starting module, a second starting module, a temperature-sensing element and a first controlling module. The first starting module receives the input voltage and starts the first fan module. The second starting module, which is electrically connected to the second fan module, receives the input voltage. The temperature-sensing element produces a sensing signal in accordance with an ambient temperature. The first controlling module controls the second starting module in accordance with the sensing signal so as to start the second fan module.

1 . A fan system for receiving an input voltage from exterior, the fan system comprising: 
 a first fan module;    a second fan module;    a first starting module for receiving the input voltage so as to start the first fan module;    a second starting module electrically connected with the second fan module for receiving the input voltage;    a temperature-sensing element for producing a sensing signal in accordance with an ambient temperature; and    a first controlling module for controlling the second starting module to start the second fan module in accordance with the sensing signal.    
   
   
       2 . The fan system according to  claim 1 , wherein both the first starting module and the second starting module comprise: 
 a first switch element having a terminal for receiving the input voltage to start the corresponding one of the first fan module and the second fan module; and    a second switch element electrically connected with the first switch element for controlling the first switch element.    
   
   
       3 . The fan system according to  claim 2 , wherein both the first starting module and the second starting module further comprises a capacitor having a terminal for electrically connected with the first switch element.  
   
   
       4 . The fan system according to  claim 2 , wherein both the first starting module and the second starting module further comprise at least one diode having a first terminal for receiving the input voltage and a second terminal for electrically connecting with the first switch element.  
   
   
       5 . The fan system according to  claim 2 , wherein both the first switch element and the second switch element are a transistor.  
   
   
       6 . The fan system according to  claim 1 , wherein the first controlling module further comprises a first comparator having a first input terminal for receiving a first reference signal, a second input terminal for receiving the sensing signal, and an output terminal electrically connected with the second starting module for controlling the second starting module to start the second fan module.  
   
   
       7 . The fan system according to  claim 6 , wherein the output terminal and the second input terminal of the first comparator are connected with each other through a resistor.  
   
   
       8 . The fan system according to  claim 1 , wherein the temperature-sensing element is a thermistor or a negative temperature coefficient (NTC) thermistor.  
   
   
       9 . The fan system according to  claim 1 , further comprising: 
 a third fan module;    a third starting module electrically connected with the third fan module and receiving the input voltage; and    a second controlling module for controlling the third starting module to start the third fan module in accordance with the sensing signal.    
   
   
       10 . The fan system according to  claim 9 , wherein the second controlling module comprises a second comparator having a first input terminal for receiving a second reference signal, a second input terminal for receiving the sensing signal, and an output terminal electrically connected with the third starting module for controlling the third starting module to start the third fan module.  
   
   
       11 . The fan system according to  claim 10 , wherein the output terminal and the second input terminal of the second comparator are connected with each other through a resistor.  
   
   
       12 . A temperature-sensing module for receiving an input voltage from exterior and cooperating with a fan module, the temperature-sensing module comprising: 
 a starting unit electrically connected with the fan module and receiving the input voltage;    a temperature-sensing element for producing a sensing signal in accordance with an ambient temperature; and    a controlling unit for controlling the starting unit to start the fan module in accordance with the sensing signal.    
   
   
       13 . The temperature-sensing module according to  claim 12 , wherein the starting unit comprises: 
 a first switch element having a terminal for receiving the input voltage to start the fan module; and    a second switch element electrically connected with the first switch element for controlling the first switch element.    
   
   
       14 . The temperature-sensing module according to  claim 13 , wherein the starting unit further comprises a capacitor having a terminal for electrically connected with the first switch element.  
   
   
       15 . The temperature-sensing module according to  claim 13 , wherein the starting unit further comprises at least one diode having a first terminal for receiving the input voltage and a second terminal for electrically connecting with the first switch element.  
   
   
       16 . The temperature-sensing module according to  claim 13 , wherein both the first switch element and the second switch element are a transistor.  
   
   
       17 . The temperature-sensing module according to  claim 12 , wherein the controlling unit comprises a comparator having a first input terminal for receiving a reference signal, a second input terminal for receiving the sensing signal, and an output terminal electrically connected with the starting unit for controlling the starting unit to start the fan module.  
   
   
       18 . The temperature-sensing module according to  claim 17 , wherein the output terminal and the second input terminal of the comparator are connected with each other through a resistor.  
   
   
       19 . The temperature-sensing module according to  claim 12 , wherein the temperature-sensing element is a thermistor or a negative temperature coefficient (NTC) thermistor.