Surge protection device

1. A surge protection device, comprising:

a surge protection circuit which has a plurality of surge protection elements, receives a power source and correspondingly generates a sampling signal according to the power source;

a controller which is coupled to the surge protection circuit and compares a representative voltage value of the power source corresponding to the sampling signal with a first reference value to determine a using state of the surge protection circuit;

a wireless module which is coupled to the controller and correspondingly transmits the using state to a remote server;

a surge absorbing circuit which has the plurality of surge protection elements and performs a surge protection operation on the power source; and

a sampling circuit which is coupled to the surge absorbing circuit and performs a step-down operation and a full-wave rectification operation on the power source on which the surge protection operation is performed, so as to generate the sampling signal.

2. The surge protection device according to claim 1 , wherein the using state of the surge protection circuit comprises a normal state and a damaged state, and when the controller determines that the surge protection circuit is in the damaged state, the controller generates a damage signal to the wireless module and causes the wireless module to upload the damage signal to the remote server.

3. The surge protection device according to claim 2 , wherein when a voltage value of the power source corresponding to the sampling signal is less than the first reference value, the controller determines that the surge protection circuit is in the damaged state, and the controller generates the damage signal for recording the damaged state to the wireless module, so as to cause the wireless module to upload the damage signal to the remote server.

4. The surge protection device according to claim 3 , wherein when the voltage value of the power source corresponding to the sampling signal is greater than the first reference value, the controller determines that the surge protection circuit is in the normal state.

5. The surge protection device according to claim 4 , wherein the surge protection device further comprises:

a switch circuit coupled to the controller to be turned on or off according to the damaged state of the surge protection circuit; and

an indication circuit coupled to the switch circuit to indicate the using state of the surge protection circuit,

wherein when the surge protection circuit is in the normal state, the controller generates a control signal, and the switch circuit is turned on according to the control signal to cause the indication circuit to perform an indication operation.

6. The surge protection device according to claim 5 , wherein the controller further has a second reference value, a third reference value, a fourth reference value, and a fifth reference value,

wherein the first reference value to the fifth reference value in descending order are the fourth reference value, the fifth reference voltage, the second reference value, the third reference value, and the first reference value.

7. The surge protection device according to claim 6 , wherein when the voltage value of the power source corresponding to the sampling signal is less than the third reference value and greater than the first reference value, the surge protection device is operated in a low voltage off mode, and the controller provides the control signal with a disable voltage level to the switch circuit, so that the switch circuit is turned off according to the control signal.

8. The surge protection device according to claim 6 , wherein when the voltage value of the power source corresponding to the sampling signal is greater than or equal to the second reference value, the surge protection device is operated in a low voltage start mode, and the controller provides the control signal with an enable voltage level to the switch circuit, so that the switch circuit is turned on according to the control signal to cause the indication circuit to perform the indication operation.

9. The surge protection device according to claim 6 , wherein when the voltage value of the power source corresponding to the sampling signal is greater than or equal to the fourth reference value, the surge protection device is operated in an overvoltage off mode, and the controller provides the control signal with a disable voltage level to the switch circuit, so that the switch circuit is turned off according to the control signal.

10. The surge protection device according to claim 6 , wherein when the voltage value of the power source corresponding to the sampling signal is reduced from greater than the fifth reference value to less than the fifth reference value, the surge protection device is operated in an overvoltage recovery mode, and the controller provides the control signal with an enable voltage level to the switch circuit, so that the switch circuit is turned on according to the control signal to cause the indication circuit to perform the indication operation.

11. The surge protection device according to claim 1 , wherein the surge protection circuit further has a plurality of fuse elements, the plurality of fuse elements being coupled to the plurality of surge protection elements,

and when the plurality of surge protection elements are damaged by a surge of the power source and are in the damaged state, the plurality of fuse elements are blown according to the surge of the power source to disconnect current paths of the plurality of surge protection elements.

12. The surge protection device according to claim 11 , wherein the power source is a single-phase AC power source supplied by a mains system.

13. The surge protection device according to claim 12 , wherein

the surge absorbing circuit receives a live wire voltage, a neutral wire voltage and a ground wire voltage of the single-phase AC power source to generate a first live wire voltage and a first neutral wire voltage, and performs the surge protection operation for the single-phase AC power source with the plurality of surge protection elements,

wherein the sampling circuit performs a step-down operation and a full-wave rectification operation for the first live wire voltage and the first neutral wire voltage to generate the sampling signal.

14. The surge protection device according to claim 13 , wherein the surge absorbing circuit comprises:

a live wire end for receiving the live wire voltage;

a neutral wire end for receiving the neutral wire voltage;

a ground wire end for receiving the ground wire voltage;

a first fuse element having a first end coupled to the live wire end;

a first surge protection element coupled between a second end of the first fuse element and the neutral wire end;

a second surge protection element coupled between the second end of the first fuse element and the ground wire end;

a second fuse element having a first end coupled to the neutral wire end; and

a third surge protection element coupled between a second end of the second fuse element and the ground wire end.

15. The surge protection device according to claim 13 , wherein the surge protection device further comprises:

a power conversion circuit which is coupled to the surge protection circuit, receives the live wire voltage and the neutral wire voltage, and converts the live wire voltage and the neutral wire voltage into a first power source voltage and a second power source voltage to supply the first power source voltage to the controller and the wireless module and to supply the second power source voltage to the switch circuit,

wherein the first power source voltage is less than the second power source voltage.

16. The surge protection device according to claim 1 , wherein the plurality of fuse elements are thermal fuses.

17. The surge protection device according to claim 1 , wherein the surge protection elements are varistors.