THERMOSTAT WITH GFCI

• US 20100163635A1
• Filed: 12/22/2009
• Published: 07/01/2010
• Est. Priority Date: 12/25/2008
• Status: Abandoned Application

• Current Assignee: Shanghai Okonoff Electrical Company Limited
• Original Assignee: Shanghai Okonoff Electrical Company Limited
• Inventors: YE, Leo
• Application Number:
  US12/644,636
• Publication Number:
  US 20100163635A1
• Time in Patent Office: Days
• US Class Current: 236/94
• CPC Class Codes: F24F 11/30 for purposes related to the operation of the system, e.g. for safety or monitoring
• CPC Class Codes: F24F 11/36 to leakage of heat-exchange fluid
• CPC Class Codes: F24F 11/38 Failure diagnosis
• CPC Class Codes: F24F 11/52 Indication arrangements, e.g. displays
• CPC Class Codes: F24F 11/88 Electrical aspects, e.g. circuits
• CPC Class Codes: F24F 2110/10 Temperature
• CPC Class Codes: G05D 23/1917 using digital means

Abstract

The present invention provides a thermostat with GFCI which includes control module, keyboard module, communication module and display module, and it further includes a leakage detection module, and the control module includes the temperature sensor, and the leakage detection module is connected with the control module, keyboard module and display module respectively. The control module is connected with the controlled device by the leakage detection module. The thermostat monitors current status of output circuit while adjusting the temperature of room, so that it can ensure the safety of the output circuit in use. If leakage occurs to the controlled device, the thermostat can cut off the power and stop power supplying at once, and the alarm light illuminates in the meantime. After manual reset, the alarm light goes out. It works with a wide input voltage range and makes the thermostat normally work at multistage voltage, and it can detect the leakage current accurately, and cut off power in time and report to the system.

Claims

1. A thermostat with GFCI for maintaining the temperature to a default value and includes control module, keyboard module and display module, which is characterized in that it further includes a leakage detection module, and the control module includes the temperature sensor, which is used to collect the external temperature, and the leakage detection module is connected with the control module, keyboard module and display module respectively, and the control module is connected with the controlled device by the leakage detection module.

2. The thermostat according to claim 1, characterized in that the leakage detection module includes a leakage fault protection chip, a detection circuit, an output circuit and a signal reset circuit.

3. The thermostat according to claim 2, characterized in that the output circuit includes two optical couplers which are used for separating input signal and output signal.

4. The thermostat according to claim 2, characterized in that the detection circuit includes a circuit which is used for deciding whether leakage exists in the circuit or not by detecting whether the current of L line and N line of the current transformer is equal.

5. The thermostat according to claim 4, characterized in that the current transformer is located near AC power source to detect whether leakage exists or not in the controlled device and the thermostat simultaneously.

6. The thermostat according to claim 2, characterized in that the leakage detection module includes the indicator which is used for indicating circuit leakage.

7. The thermostat according to claim 6, characterized in that the display module includes the display symbol which is used for indicating circuit leakage. (show points:

turned into sign, symbol and feature code)

8. The thermostat according to claim 1, characterized in that the control module is connected with and controls the controlled device by relay.

9. The thermostat according to claim 1, characterized in that the control module reports the status of the thermostat by communication circuit.

10. The thermostat according to claim 3, characterized in that the detection circuit includes a circuit which is used for deciding whether leakage exists in the circuit or not by detecting whether the current of L line and N line of the current transformer is equal.

11. The thermostat according to claim 3, characterized in that the leakage detection module includes the indicator which is used for indicating circuit leakage.

12. The thermostat according to claim 5, characterized in that the leakage detection module includes the indicator which is used for indicating circuit leakage.

13. The thermostat according to claim 2, characterized in that the control module reports the status of the thermostat by communication circuit.

14. The thermostat according to claim 3, characterized in that the control module reports the status of the thermostat by communication circuit.

15. The thermostat according to claim 4, characterized in that the control module reports the status of the thermostat by communication circuit.

16. The thermostat according to claim 5, characterized in that the control module reports the status of the thermostat by communication circuit.

17. The thermostat according to claim 7, characterized in that the control module reports the status of the thermostat by communication circuit.

18. The thermostat according to claim 8, characterized in that the control module reports the status of the thermostat by communication circuit.