Power supply test system

Abstract

A power supply test system for testing reliability of a power supply includes a test chamber, a temperature detecting unit, a control unit, a heating module, and a refrigerating module. The test chamber accommodates the power supply. The temperature detecting unit detects temperature signals in the test chamber. The control unit presets a predetermined temperature value and receives the temperature signals. The heating module receives a first control signal from the control unit when a value of the temperature signal is less than the predetermined temperature value. The heating module heats the test chamber. The refrigerating module receives a second control signal from the control unit when a value of the temperature signal is greater than the predetermined temperature value. The refrigerating module refrigerates the test chamber until the value of the temperature signal is equal to the predetermined temperature value.

What is claimed is: 
     
         1 . A power supply test system for testing reliability of a power supply, the power supply test system comprising:
 a test chamber adapted to accommodate the power supply;   a temperature detecting unit adapted to detect temperature signals in the test chamber;   a control unit adapted to preset a predetermined temperature value and receive the temperature signals;   a heating module adapted to receive a first control signal from the control unit when a value of the temperature signal is less than the predetermined temperature value; the heating module is adapted to heat the test chamber; and   a refrigerating module adapted to receive a second control signal from the control unit when a value of the temperature signal is greater than the predetermined temperature value; the refrigerating module is adapted to refrigerate the test chamber until the value of the temperature signal is equal to the predetermined temperature value.   
     
     
         2 . The power supply test system of  claim 1 , wherein the control unit comprises a micro controller comprising a first control signal output terminal; the refrigerating module comprises a first relay and a first refrigerating unit; the first relay comprises a first winding unit, a first switch unit, and a second switch unit; a first terminal of the first winding unit is electrically connected to the first control signal output terminal to receive the first control signal; a second terminal of the first winding unit receives a first DC voltage; first terminals of the first switch unit and the second switch unit receive a second DC voltage; and second terminals of the first switch unit and the second switch unit are electrically connected to the first refrigerating unit. 
     
     
         3 . The power supply test system of  claim 2 , wherein the micro controller further comprises at least one second control signal output terminal; the heating module comprises at least one second relay and one first heating unit; the second relay comprises a second winding unit and a third switch unit; a first terminal of the second winding unit is electrically connected to the second control signal output terminal to receive the second control signal; a second terminal of the second winding unit is grounded; a first terminal of the third switch unit receives the second DC voltage; and a second terminal of the third switch unit is grounded via the first heating unit. 
     
     
         4 . The power supply test system of  claim 3 , wherein the first heating unit comprises a plurality of thermal resistors connected to each other in parallel. 
     
     
         5 . The power supply test system of  claim 1 , further comprising a decoding module electrically connected to the temperature detecting unit and the control unit, and a display module electrically connected to the decoding module; and the decoding module decodes the temperature signals to temperature values which are displayed on the display module. 
     
     
         6 . The power supply test system of  claim 5 , wherein the micro controller further comprises a serial data signal output terminal; the decoding module comprises at least one first register and one second register; each of the first register and the second register comprises two serial data input terminals and a plurality of digital signal output terminals; the serial data signal output terminal is electrically connected to the two serial data input terminals of the first register; and the two serial data input terminals of the second register are electrically connected to one of the digital signal output terminals of the first register. 
     
     
         7 . The power supply test system of  claim 6 , wherein the display module comprises at least one first numeral tube and one second numeral tube; each of the first numeral tube and the second numeral tube comprises a plurality of digital signal input terminals; the plurality of digital signal output terminals of the first register are electrically connected to the plurality of digital signal input terminals of the first numeral tube; and the plurality of digital signal output terminals of the second register are electrically connected to the plurality of digital signal input terminals of the second numeral tube. 
     
     
         8 . The power supply test system of  claim 1 , further comprising an alarm module; the micro controller further comprises a power good signal input terminal and an alarm signal output terminal; the power supply comprises a power good signal output terminal electrically connected to the power good signal input terminal; and when the power good signal input terminal fails to receive a power good signal from the power supply, the alarm signal output terminal outputs an alarm signal to the alarm module and the alarm module triggers alarms. 
     
     
         9 . The power supply test system of  claim 8 , wherein the alarm module comprises a transistor and buzzer; a base of the transistor is electrically connected to the alarm signal output terminal of the micro controller; an emitter of the transistor is electrically connected to an anode of the buzzer; a collector of the transistor receives the first DC voltage; and a cathode of the buzzer is grounded. 
     
     
         10 . The power supply test system of  claim 1 , further comprising a power module adapted to convert an AC voltage to the second DC voltage. 
     
     
         11 . A power supply test system for testing reliability of a power supply, the power supply test system comprising:
 a temperature detecting unit adapted to detect temperature signals of the power supply;   a control unit adapted to preset a predetermined temperature value and receive the temperature signals;   a heating module adapted to receive a first control signal from the control unit when a value of the temperature signal is less than the predetermined temperature value; the heating module is adapted to heat the power supply; and   a refrigerating module adapted to receive a second control signal from the control unit when a value of the temperature signal is greater than the predetermined temperature value; the refrigerating module is adapted to refrigerate the power supply until the value of the temperature signal is equal to the predetermined temperature value.   
     
     
         12 . The power supply test system of  claim 11 , wherein the control unit comprises a micro controller comprising a first control signal output terminal; the refrigerating module comprises a first relay and a first refrigerating unit; the first relay comprises a first winding unit, a first switch unit, and a second switch unit; a first terminal of the first winding unit is electrically connected to the first control signal output terminal to receive the first control signal; a second terminal of the first winding unit receives a first DC voltage; first terminals of the first switch unit and the second switch unit receive a second DC voltage; and second terminals of the first switch unit and the second switch unit are electrically connected to the first refrigerating unit. 
     
     
         13 . The power supply test system of  claim 12 , wherein the micro controller further comprises at least one second control signal output terminal; the heating module comprises at least one second relay and one first heating unit; the second relay comprises a second winding unit and a third switch unit; a first terminal of the second winding unit is electrically connected to the second control signal output terminal to receive the second control signal; a second terminal of the second winding unit is grounded; a first terminal of the third switch unit receives the second DC voltage; and a second terminal of the third switch unit is grounded via the first heating unit. 
     
     
         14 . The power supply test system of  claim 13 , wherein the first heating unit comprises a plurality of thermal resistors connected to each other in parallel; and the power supply is positioned in a test chamber. 
     
     
         15 . The power supply test system of  claim 11 , further comprising a decoding module electrically connected to the temperature detecting unit and the control unit, and a display module electrically connected to the decoding module; and the decoding module decodes the temperature signals to temperature values which are displayed on the display module. 
     
     
         16 . The power supply test system of  claim 15 , wherein the micro controller further comprises a serial data signal output terminal; the decoding module comprises at least one first register and one second register; each of the first register and the second register comprises two serial data input terminals and a plurality of digital signal output terminals; the serial data signal output terminal is electrically connected to the two serial data input terminals of the first register; and the two serial data input terminals of the second register are electrically connected to one of the digital signal output terminals of the first register. 
     
     
         17 . The power supply test system of  claim 16 , wherein the display module comprises at least one first numeral tube and one second numeral tube; each of the first numeral tube and the second numeral tube comprises a plurality of digital signal input terminals; the plurality of digital signal output terminals of the first register are electrically connected to the plurality of digital signal input terminals of the first numeral tube; and the plurality of digital signal output terminals of the second register are electrically connected to the plurality of digital signal input terminals of the second numeral tube. 
     
     
         18 . The power supply test system of  claim 11 , further comprising an alarm module; the micro controller further comprises a power good signal input terminal and an alarm signal output terminal; the power supply comprises a power good signal output terminal electrically connected to the power good signal input terminal; and when the power good signal input terminal fails to receive a power good signal from the power supply, the alarm signal output terminal outputs an alarm signal to the alarm module and the alarm module triggers alarms. 
     
     
         19 . The power supply test system of  claim 18 , wherein the alarm module comprises a transistor and buzzer; a base of the transistor is electrically connected to the alarm signal output terminal of the micro controller; an emitter of the transistor is electrically connected to an anode of the buzzer; a collector of the transistor receives the first DC voltage; and a cathode of the buzzer is grounded. 
     
     
         20 . The power supply test system of  claim 11 , further comprising a power module adapted to convert an AC voltage to the second DC voltage.